WO2018021186A1 - Signal control device, signal control system, signal control method, and program - Google Patents

Signal control device, signal control system, signal control method, and program Download PDF

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Publication number
WO2018021186A1
WO2018021186A1 PCT/JP2017/026477 JP2017026477W WO2018021186A1 WO 2018021186 A1 WO2018021186 A1 WO 2018021186A1 JP 2017026477 W JP2017026477 W JP 2017026477W WO 2018021186 A1 WO2018021186 A1 WO 2018021186A1
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WO
WIPO (PCT)
Prior art keywords
traffic
information
emergency vehicle
road section
change amount
Prior art date
Application number
PCT/JP2017/026477
Other languages
French (fr)
Japanese (ja)
Inventor
幸一郎 岡田
健司 ▲高▼尾
浩和 柴田
加藤　聖樹
Original Assignee
三菱重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Priority to SG11201900639UA priority Critical patent/SG11201900639UA/en
Publication of WO2018021186A1 publication Critical patent/WO2018021186A1/en

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/07—Controlling traffic signals
    • G08G1/087—Override of traffic control, e.g. by signal transmitted by an emergency vehicle
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
    • G08G1/127—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station
    • G08G1/13—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station the indicator being in the form of a map

Definitions

  • the present invention relates to a signal control device, a signal control system, a signal control method, and a program.
  • Patent Document 1 As a system that supports the emergency vehicle to reach the destination quickly, the current position of the emergency vehicle is transmitted to the command center server, and the command center server controls the traffic light before passing through the travel route of the emergency vehicle.
  • Patent Document 1 a system that allows the emergency vehicle to travel quickly has been proposed (for example, Patent Document 1).
  • control such as changing to a green signal or maintaining a green signal is uniformly performed on the traffic light provided on the travel route of the emergency vehicle.
  • the road section There is a possibility that traffic conditions such as traffic flow will not improve. That is, in such a road section, there is a possibility that control such as changing the traffic light to a green light may be performed even though the effect that the emergency vehicle can travel quickly cannot be obtained. This increases the time during which traffic lights on other road sections that are not included in the travel route of the emergency vehicle turn red, thus adversely affecting traffic flow on other road sections and causing traffic jams. there is a possibility.
  • the present invention has been made in view of such a problem, and improves the traffic situation of a road section on which an emergency vehicle travels and suppresses the influence on the traffic situation of a road section on which the emergency vehicle does not travel.
  • a signal control device, a signal control system, a signal control method, and a program are provided.
  • the signal control device includes an emergency vehicle information acquisition unit that acquires emergency vehicle information including position information of an emergency vehicle, and a traffic state change amount according to a lighting state of the traffic light for each road section.
  • a traffic condition change amount information acquisition unit for acquiring the traffic condition change amount information shown, the emergency vehicle information, and the traffic condition change amount information of the traffic light provided in the road section on which the emergency vehicle travels.
  • a signal control unit that performs control.
  • the signal control part can improve the traffic condition of the road area where an emergency vehicle drive
  • traffic on other road sections where emergency vehicles do not travel may be restricted and traffic conditions may deteriorate.
  • the signal control unit does not control the traffic signal for the road segment in which the traffic situation is expected not to be improved even if the traffic signal of the road segment on which the emergency vehicle travels is controlled. The influence on the situation can be suppressed.
  • the emergency vehicle information further includes a planned travel route of the emergency vehicle
  • the traffic state change amount information acquisition unit includes the planned travel route.
  • the traffic condition change amount information of each road section included is acquired, the signal control unit based on the emergency vehicle information and the traffic condition change amount information of each road section included in the planned travel route, Before the emergency vehicle reaches each road section, the traffic light provided in each road section is controlled.
  • the signal control part can improve the traffic condition of the road section included in the driving planned route of an emergency vehicle, before an emergency vehicle drive
  • the signal control device can cause the emergency vehicle to travel quickly and smoothly.
  • the signal control device includes a signal switching information acquisition unit that acquires signal switching information indicating that the lighting state of the traffic signal has been switched, and a road section in which the traffic signal is provided.
  • a traffic condition index acquisition unit for acquiring the traffic condition index, the traffic condition index when the signal switching information is acquired from the traffic light, and the traffic condition index when the previous signal switching information is acquired from the traffic light,
  • a traffic condition change amount information generation unit that generates traffic condition change amount information of the road section where the traffic signal is provided.
  • the restriction information on the restriction target road section in which traffic restriction is performed when the signal control unit controls the traffic light is transmitted to the restriction target road section.
  • It further includes a regulation information transmission unit that transmits to at least one of the vehicle-mounted device mounted on the vehicle located in the vehicle and the regulation information notification unit provided in the road section.
  • the regulation information transmission unit may cause a driver of a general vehicle to recognize a road section where an emergency vehicle is scheduled to travel and a road section subject to regulation, and induce an action such as traveling while avoiding these road sections. it can.
  • the restriction information transmission unit can make emergency vehicles run smoothly with priority, and can reduce the possibility that traffic conditions will deteriorate due to traffic jams or the like in the restriction target road section.
  • a signal control system collects probe data including position information of the signal control device according to any one of the above aspects and an on-vehicle device mounted on each of a plurality of vehicles.
  • generation part can produce
  • the traffic condition index generation unit can improve the accuracy of the traffic condition index.
  • the signal control device can accurately select and control a traffic light having a large effect of improving the road condition based on the highly accurate traffic condition index.
  • a signal control method includes an emergency vehicle information acquisition step of acquiring emergency vehicle information including position information of an emergency vehicle, and a traffic state change amount according to a lighting state of a traffic light for each road section.
  • a traffic situation change amount information acquisition step for obtaining the traffic situation change amount information shown, the emergency vehicle information, and the traffic situation change amount information;
  • a program uses a computer of a signal control device, an emergency vehicle information acquisition unit that acquires emergency vehicle information including position information of an emergency vehicle, and a change amount of a traffic situation according to a lighting state of a traffic light.
  • the traffic situation change amount information acquisition unit for obtaining traffic situation change amount information indicating the road section, the emergency vehicle information, and the traffic situation change amount information, provided in the road section on which the emergency vehicle travels It functions as a signal control unit that controls the traffic light.
  • the traffic situation of the road section where the emergency vehicle travels is improved and the influence on the traffic situation of the road section where the emergency vehicle does not travel is suppressed. It is possible.
  • FIG. 1 is a diagram showing an overall configuration of a signal control system according to an embodiment of the present invention.
  • the signal control system 1 of the present embodiment includes a probe data collection unit 10, a traffic condition index generation unit 20, and a traffic condition database 30 that are communicably connected via a network NW such as the Internet. And a signal control device 50.
  • NW such as the Internet
  • the probe data collection unit 10, the traffic condition index generation unit 20, the traffic condition database 30, and the signal control device 50 may be communicably connected via a dedicated line such as a LAN (Local Area Network).
  • LAN Local Area Network
  • the probe data collection unit 10 collects probe data (on-vehicle device probe data) transmitted from the vehicle-mounted device A mounted on the vehicle via the network NW at every predetermined time (for example, every second).
  • the “onboard device A” includes an onboard device A1 mounted on an emergency vehicle and an onboard device A2 mounted on a general vehicle other than the emergency vehicle.
  • “Vehicle” includes emergency vehicles and general vehicles.
  • An emergency vehicle is a vehicle such as an ambulance, fire truck, police vehicle, etc. that is required to reach its destination quickly for emergency services, and must be stopped according to the lighting state of the traffic light S, etc. It is a vehicle that does not need to stop even at a point where it does not.
  • the lighting state of the traffic light S indicates, for example, any signal such as “red signal (progress inhibition signal)”, “blue signal (progress signal)”, “yellow signal (stop signal)”. Indicates whether Moreover, a general vehicle is all vehicles other than an emergency vehicle, and is a vehicle which needs to stop according to the lighting state of the traffic light S, etc.
  • the probe data includes “transmission date and time”, “device type”, “device ID”, “position information”, “movement speed”, and the like.
  • Transmission date and time is information indicating the date and time when the probe data is transmitted from the vehicle-mounted device A1 or the vehicle-mounted device A2.
  • Equipment type is information for specifying whether the transmission source of the probe data is the vehicle-mounted device A1 (emergency vehicle) or the vehicle-mounted device A2 (general vehicle).
  • the “apparatus ID” is information that can identify the in-vehicle device A1 or the in-vehicle device A2 that is the transmission source of the probe data.
  • the “device type” is omitted, and probe data is transmitted based on the “device ID”. You may make it identify whether the origin is onboard equipment A1 or onboard equipment A2.
  • “Position information” is information indicating a point (latitude, longitude, etc.) where an emergency vehicle equipped with the vehicle-mounted device A1 or a general vehicle equipped with the vehicle-mounted device A2 is located at the date and time when the probe data was transmitted.
  • “Movement speed” is information indicating the traveling speed (m / s) of an emergency vehicle equipped with the vehicle-mounted device A1 or a general vehicle equipped with the vehicle-mounted device A2 at the date and time when the probe data was transmitted.
  • FIG. 2 is a diagram illustrating an example of a road section according to an embodiment of the present invention.
  • the traffic condition index generation unit 20 generates a traffic condition index for each road section at predetermined time intervals (for example, every second) based on the probe data collected by the probe data collection unit 10.
  • the road section indicates a region between two adjacent nodes among nodes set at each of a plurality of traffic nodes (intersections and the like) on the road.
  • Each road section is given a “link ID” that can identify the road section. For example, as shown in FIG.
  • a road section indicating a lane heading to the other side has a link ID “B20a” attached to a road section indicating a lane heading to one side, which is an area between two nodes (intersections).
  • a link ID “B20b” is attached to the section.
  • a node may be set for each predetermined distance.
  • the traffic condition index generation unit 20 includes “link ID”, “road section position information” indicating the position of the road section (for example, the latitude and longitude of the start point and end point of the road section), and “road section Map data associated with “the length of the traffic light” and “the traffic light information” indicating the information of the traffic light S provided in the road section (the traffic light ID that can identify the traffic light S, the installation position of the traffic light S, etc.) in advance.
  • the traffic condition index is information indicating the traffic condition of the vehicle in the road section.
  • the traffic condition index includes “traffic volume”, “traffic density”, and “average speed”.
  • the “traffic volume” indicates the number of vehicles passing per second (units / second) in the road section.
  • Traffic density indicates the number of vehicles per meter (units / m) in a road section.
  • Average speed indicates an average moving speed (m / s) of a vehicle traveling in a road section.
  • the traffic condition index generation unit 20 based on the probe data used when calculating the traffic condition index, information on the road section (link ID) and the vehicle-mounted device A located in the road section (one of the probe data).
  • the traffic situation table of the traffic situation database 30 includes “transmission date and time” of each probe data, “device type”, “device ID” and “position information” of the onboard device A that is the transmission source of each probe data, and the onboard device A.
  • the “link ID” of the road section where the vehicle is located is recorded in association with each other.
  • the traffic situation index generated by the traffic situation index generation unit 20 and a traffic situation table are recorded.
  • the signal control device 50 controls the lighting states of the plurality of traffic lights S (S1 to Sn) provided in each road section via the network NW.
  • FIG. 3 is a diagram illustrating a functional configuration of the traffic condition index generation unit according to the embodiment of the present invention.
  • the traffic condition index generation unit 20 first acquires probe data from the probe data collection unit 10. Then, the traffic condition index generation unit 20 uses a known big data distributed processing technique, a stream data processing technique, etc., and the traffic condition index for each road section based on the probe data collected from the plurality of vehicle-mounted devices A and portable terminals T. Is generated.
  • the traffic condition index generating unit 20 records the traffic condition index in the traffic condition database 30 for each road section. Thereby, the traffic condition index generation unit 20 can generate a traffic condition index corresponding to the actual situation for each road section in real time.
  • the traffic condition index generation unit 20 based on the probe data used when calculating the traffic condition index, information on the road section (link ID) and the vehicle-mounted device A located in the road section (one of the probe data). And the traffic status data associated with the traffic status database 30 is added to the traffic status table of the traffic status database 30 and updated.
  • FIG. 4 is a first diagram illustrating a processing flow of the traffic condition index generation unit according to the embodiment of the present invention.
  • the processing flow of the traffic condition index generation unit 20 of the present embodiment will be described with reference to FIG.
  • the traffic condition index generation unit 20 acquires the probe data collected by the probe data collection unit 10 (step S200).
  • the traffic condition index generation unit 20 generates a traffic condition index for each road section based on the probe data, and updates the traffic condition table (step S201). Details of the traffic condition index generation process and the traffic condition table update process will be described later.
  • the traffic condition index generation unit 20 records and accumulates the generated traffic condition index for each road section and the traffic condition table in the traffic condition database 30 (step S202). As described above, the traffic condition index generation unit 20 repeatedly executes the above process every time the probe data is acquired.
  • FIG. 5 is a second diagram illustrating a processing flow of the traffic condition index generation unit according to the embodiment of the present invention.
  • FIG. 6 is a third diagram illustrating a processing flow of the traffic condition index generation unit according to the embodiment of the present invention.
  • the traffic condition index generation unit 20 identifies a road section where a vehicle equipped with the vehicle-mounted device A that is a transmission source of each probe data is located (hereinafter, a road section where the vehicle is located). Processing P21 to be performed is performed. In process P21, first, the traffic condition index generation unit 20 reads “position information” from each probe data (step S210).
  • the traffic condition index generation unit 20 specifies the road section where each vehicle is located based on the “position information” of each probe data (step S211). Specifically, the traffic condition index generation unit 20 searches and specifies a road section having “road section position information” including “position information” (latitude and longitude) of the probe data from the map data.
  • the traffic condition index generation unit 20 adds the “link ID” of the identified road section to each probe data (step S212).
  • the traffic condition index generating unit 20 associates the “transmission date / time”, “device type”, and “device ID” of each probe data with the “link ID” of the road section added in step S212. Is updated by adding to the traffic situation table recorded in the traffic situation database 30 (step S213). As described above, the traffic condition index generation unit 20 repeatedly executes the process P21 each time the probe data is acquired.
  • the traffic condition index generation unit 20 calculates the traffic condition index at each time of each road section based on the plurality of probe data to which the “link ID” is added by the process P21.
  • Process P22 is performed.
  • the traffic condition index generation unit 20 extracts target probe data to be calculated from among a plurality of probe data (step S220).
  • the traffic condition index generation unit 20 generates probe data indicating that it exists in an arbitrary target road section at an arbitrary target time based on the “transmission date and time” and “link ID” of each probe data. Extracted as target probe data for calculation processing.
  • the traffic condition index generation unit 20 is probe data having “transmission date and time” within a predetermined time (for example, 1 second) from an arbitrary target time, and is the same as the link ID of an arbitrary target road section. Probe data having “link ID” is extracted as target probe data for the arithmetic processing.
  • the traffic condition index generation unit 20 acquires “movement speed” (hereinafter, “movement speed” of the vehicle) of the vehicle on which each vehicle-mounted device A included in the target probe data is mounted (step S221). Specifically, the traffic condition index generation unit 20 reads and acquires the “movement speed” of the vehicle included in the probe data.
  • the “movement speed” of the probe data is recorded in meters per second (m / s) will be described, but in other embodiments, kilometers per hour (km / h), etc. It may be recorded in other units.
  • the traffic condition index generation unit 20 may acquire the “movement speed” by converting it into meters per second (m / s).
  • the traffic condition index generation unit 20 calculates “the number of vehicles” indicating the number of vehicles equipped with the vehicle-mounted device A located in the target road section based on each probe data included in the target probe data ( Step S222).
  • the traffic condition index generation unit 20 searches and acquires “the length of the target road section” from the map data using the “link ID” of the target road section as a search key (step S223).
  • the traffic condition index generation unit 20 calculates the traffic density at the target time of the target road section (step S225). Specifically, the traffic condition index generation unit 20 uses “the number of vehicles” calculated in step S222 as N and “the length of the target road section” acquired in step S223 as K, and uses the following formula (2). To determine the traffic density k (units / m).
  • the traffic condition index generation unit 20 calculates the traffic condition index at each time of each road section by repeatedly executing the process P22 each time the probe data is acquired.
  • FIG. 7 is a diagram illustrating a functional configuration of the signal control device according to the embodiment of the present invention.
  • the signal control device 50 includes a signal switching information acquisition unit 510, a traffic condition index acquisition unit 520, a traffic condition change amount information generation unit 530, an emergency vehicle information acquisition unit 540, and a traffic condition change.
  • An amount information acquisition unit 550, a signal control unit 560, a restriction information transmission unit 570, and a recording medium 580 are provided.
  • the signal switching information acquisition unit 510 acquires signal switching information indicating which lighting state has been switched from each traffic signal via the network NW every time the lighting status of each traffic signal S is switched.
  • the signal switching information includes a “traffic signal ID” that can identify a traffic signal, a “lighting state”, and the like.
  • the traffic condition index acquiring unit 520 displays the traffic condition index of the road section where the traffic signal S that is the transmission source of the signal switching information is provided via the network NW. Obtained from the traffic situation database 30.
  • the traffic condition index acquisition unit 520 records and accumulates information in which the signal switching information and the traffic condition index are associated with each other in the recording medium 580.
  • FIG. 8 is a first diagram illustrating the function of the signal control device according to the embodiment of the present invention.
  • FIG. 9 is a first diagram illustrating an example of traffic state change amount information according to an embodiment of the present invention.
  • FIG. 10 is a second diagram illustrating the function of the signal control device according to the embodiment of the present invention.
  • FIG. 11 is a second diagram illustrating an example of traffic state change amount information according to an embodiment of the present invention.
  • FIG. 8 is an example of the signal switching information of the traffic light S20 and the traffic condition index of the road section B20a in a certain time zone during the day, and shows an example where the traffic volume is large and the traffic condition changes greatly according to the lighting state of the traffic light S20. Has been.
  • FIG. 8 is an example of the signal switching information of the traffic light S20 and the traffic condition index of the road section B20a in a certain time zone during the day, and shows an example where the traffic volume is large and the traffic condition changes greatly according to the lighting state of the traffic light S20. Has
  • the traffic volume is small and the change of the traffic condition is small according to the lighting state of the traffic light S20.
  • the horizontal axis represents the time when the signal switching information is acquired, and the vertical axis represents the value of the traffic condition index (traffic volume, traffic density, and average speed).
  • the traffic condition index (traffic volume, traffic density, and average speed).
  • the traffic situation change amount information generation unit 530 When the signal switching information acquisition unit 510 acquires the signal switching information from the traffic light S, the traffic situation change amount information generation unit 530 and the traffic status index at the time when the signal switching information is acquired and the previous signal switching information from the traffic light S are obtained. Based on the traffic condition index at the time when the traffic signal is acquired, a change in traffic condition according to the lighting state of the traffic light S as shown in FIGS. 8 and 10 is detected, and the traffic situation of the road section where the traffic signal S is provided Change amount information D30 (FIGS. 9 and 11) is generated. The traffic situation change amount information generation unit 530 records and accumulates the generated traffic situation change amount information D30 in the recording medium 580.
  • FIG. 9 is an example of the traffic situation change amount information D30 in the same time zone as FIG.
  • FIG. 11 shows an example of the traffic condition change amount information D30 in the same time zone as FIG. 10, and shows an example in which the traffic condition is small and the change of the traffic condition is small according to the lighting state of the traffic light S20.
  • the traffic situation change amount information D30 indicates how the traffic situation (traffic volume, traffic density, and average speed) of the road section where the traffic signal S is provided changes according to the lighting state of the traffic light S. Information. Specifically, as shown in FIGS. 9 and 11, the traffic situation change amount information D30 indicates whether the traffic situation of the road section “improves” or “deteriorates” according to the lighting state of the traffic light S.
  • the traffic state change amount information generation unit 530 determines that the degree of “improvement” or “deterioration” is large when the change amount of the traffic amount, the traffic density, and the average speed is equal to or greater than a predetermined value.
  • a predetermined value different values are set for the traffic volume, the traffic density, and the average speed.
  • the predetermined value may be set to a different value for each road section according to the characteristics of the road section such as the road width and the number of lanes.
  • the emergency vehicle information acquisition unit 540 acquires emergency vehicle information from the vehicle-mounted device A1 mounted on the emergency vehicle via the network NW.
  • the emergency vehicle information includes “transmission date and time”, “device ID”, “position information”, “movement speed”, “destination”, “scheduled travel route”, and the like.
  • “Transmission date and time” is information indicating the date and time when the emergency vehicle information is transmitted from the vehicle-mounted device A1.
  • the “device ID” is information that can identify the vehicle-mounted device A1 that is the transmission source of the emergency vehicle information, and is the same as the “device ID” included in the probe data.
  • “Position information” is information indicating a point (latitude, longitude, etc.) where the emergency vehicle equipped with the vehicle-mounted device A1 is located at the date and time when the emergency vehicle information was transmitted.
  • “Movement speed” is information indicating the traveling speed (m / s) of the emergency vehicle on which the vehicle-mounted device A1 is mounted at the date and time when the emergency vehicle information is transmitted.
  • “Destination” is information indicating a point (latitude, longitude, etc.) to which the emergency vehicle arrives.
  • the “scheduled travel route” is information in which one or more road sections (link IDs) included in the route from the point where the emergency vehicle is located to the destination are listed in the order in which the emergency vehicle travels.
  • the emergency vehicle information acquisition part 540 may acquire the probe data transmitted from onboard equipment A1 as emergency vehicle information. In this case, each piece of information on the emergency vehicle information described above is included in the probe data transmitted from the vehicle-mounted device A1.
  • the traffic state change amount information acquisition unit 550 acquires the traffic state change amount information D30 stored in the recording medium 580.
  • the traffic state change amount information acquisition unit 550 is associated with each road section included in the “scheduled travel route” of the emergency vehicle information. Traffic situation change amount information D30 is acquired from recording medium 580.
  • the signal control unit 560 determines the traffic signal S provided in each road section included in the “scheduled travel route”. Take control. Specifically, when each traffic light S is controlled based on the emergency vehicle information and traffic situation change amount information D30, the signal control unit 560 improves the traffic situation of the road section where each traffic light S is provided. Determine if the effect is significant. Then, when the signal control unit 560 controls the traffic light S to be in a certain lighting state (for example, “green light” state), the effect of improving the traffic condition of the road section where the traffic light S is provided is great. If it is determined, the traffic light S is selected as a control target.
  • a certain lighting state for example, “green light” state
  • the signal control unit 560 instructs to switch the lighting state of the traffic light S to be controlled (switch to “green light”) or extends the current lighting state of the traffic light S (extends the state of “blue light”). By transmitting signal control information including a command to the traffic light S, the traffic light S is controlled.
  • the signal control unit 560 determines that “the effect of improving the traffic situation is small” in the road section where the traffic light S is provided even if the lighting state of the traffic light S is controlled, the signal control unit 560 controls the traffic light S. Not performed.
  • “the effect of improving the traffic situation is small” means “the traffic situation is improved but the effect is small”, “the traffic situation does not change”, “the traffic situation is deteriorated”, etc. including.
  • the restriction information transmission unit 570 is a vehicle in which restriction information of a restriction target road section in which traffic restriction such as passage is prohibited is performed by the signal control unit 560 controlling the traffic light S, in the restriction target road section. Is transmitted to at least one of the vehicle-mounted device A and the regulation information notification unit G (described later). At this time, the regulation information transmission unit 570 searches the traffic situation table recorded in the traffic situation database 30, and the vehicle located in the road section having the same “link ID” as the “link ID” of the regulation target road section. The vehicle-mounted device A mounted on is extracted.
  • the signal control unit 560 controls the traffic light S to be able to specify a road section where traffic restriction such as traffic is prohibited (switched to “red light”) (“link ID”). "), Information on the traffic regulation period (start time and end time), and the like. Also, based on the “location information”, “movement speed”, and “planned travel route” of the emergency vehicle information, the time when the emergency vehicle travels in each road section is estimated, and for a general vehicle located in the road section, Information for notifying that the emergency vehicle is traveling may be included. By transmitting such restriction information, the restriction information transmission unit 570 can allow the driver of the general vehicle to recognize information related to the restriction target road section and the road section on which the emergency vehicle travels.
  • the regulation information may include the lighting state of each traffic light S on the “scheduled travel route” of the emergency vehicle, the traffic situation of the road section, and the like.
  • the restriction information transmission unit 570 can allow the driver of the emergency vehicle to recognize the lighting state of each traffic light S on the “scheduled travel route” and the traffic situation of each road section. it can.
  • Restricted road sections include road sections that are affected by traffic restrictions, such as road sections included in the “scheduled travel route” of emergency vehicle information, road sections connected to road sections included in the “scheduled travel route” of emergency vehicles, etc. Show.
  • the regulation information notification unit G is, for example, a road information board for displaying traffic information such as traffic jams and road closures provided on the road, a communication device for distributing traffic information to the vehicle-mounted device A via radio waves, etc. It is.
  • the restriction information transmission unit 570 estimates the time to reach each road section based on the “position information” and “movement speed” of the emergency vehicle information, and is more than the time at which the emergency vehicle is estimated to reach the reference position.
  • the restriction information may be transmitted at a timing before a predetermined time (for example, 10 seconds before). Further, based on the “position information” of the emergency vehicle information, the restriction information may be transmitted at a timing when the emergency vehicle reaches a position a predetermined distance before the reference position (for example, 100 meters before).
  • the reference position is a position where the signal S to be controlled is provided, a position of a start point or an end point of a road section where the signal S to be controlled is provided, and the like.
  • the recording medium 580 information relating the signal switching information and the traffic condition index recorded by the traffic condition index acquisition unit 520 and the traffic condition change amount information D30 generated by the traffic condition change amount information generation unit 530 are recorded. Yes.
  • map data in which a road section where each traffic signal S is provided and a road section where each regulation information notification unit G is associated is recorded in the recording medium 580 in advance.
  • FIG. 12 is a first diagram illustrating a processing flow of the signal control device according to the embodiment of the present invention.
  • FIG. 13 is a second diagram showing a processing flow of the signal control device according to the embodiment of the present invention.
  • the flow of processing of the signal control device 50 of the present embodiment will be described with reference to FIGS.
  • the signal control device 50 performs a process P50 for generating traffic condition change amount information D30 for each road section.
  • the signal switching information acquisition unit 510 acquires signal switching information from each traffic light S (step S500).
  • the traffic condition index acquiring unit 520 displays the traffic condition index of the road section in which the traffic light S, which is the transmission source of the signal switching information, is provided. Obtained from the database 30 (step S501). In addition, the traffic condition index acquisition unit 520 records and accumulates information in which the signal switching information and the traffic condition index are associated with each other in the recording medium 580.
  • the traffic status change amount information generation unit 530 obtains the traffic status index at the time of acquiring the signal switching information and the traffic signal S from the previous time. Based on the traffic condition index at the time when the signal switching information is acquired, the traffic condition change amount information D30 of the road section where the signal S is provided is generated (step S502). The traffic situation change amount information generation unit 530 records and accumulates the generated traffic situation change amount information D30 in the recording medium 580.
  • the traffic state change amount information generation unit 530 uses the traffic condition index of the road section B20a when the signal switching information is acquired from the traffic light S20 and the traffic condition index when the previous signal switching information is acquired from the traffic light S20. Based on the traffic light change information D30 of the road section B20a according to the lighting state of the traffic light S20. For example, as illustrated in FIG.
  • the traffic state change amount information generation unit 530 acquires a signal switching signal indicating that the lighting state has been switched to “green light” from the traffic light S20 at time “t2,” the time “ Based on the traffic condition index at time “t2” and the traffic condition index at time “t1” at which the previous signal switching signal was acquired, the traffic condition change amount information D30 from the time “t1” to “t2” is generated.
  • the traffic state change amount information generation unit 530 indicates that the lighting state of the traffic light S20 is “red signal”.
  • the traffic condition change amount information D30 is generated. In the example of FIG.
  • the traffic situation change amount information generation unit 530 determines that the traffic situation of the road section B20a during the period from time “t1” to “t2”, that is, when the lighting state of the traffic light S20 is “red light” is “deteriorating”. It is judged that the degree is large. For this reason, as shown in FIG. 9, the traffic condition change amount information generation unit 530 indicates that the traffic condition of the road section B20a when the lighting state of the traffic light S20 is “red light” is “the degree of deterioration is large”.
  • the traffic state change amount information D30 shown is generated.
  • the traffic state change amount information generation unit 530 acquires a signal switching signal indicating that the lighting state is switched to the “yellow signal” from the traffic light S20 at the time “t3”, the traffic state index at the time “t3”.
  • the traffic from the time “t2” to the time “t3” that is, traffic when the lighting state of the traffic light S20 is “green light” based on the traffic condition index at the time “t2” at which the previous signal switching signal was acquired.
  • the situation change amount information D30 is generated. In the example of FIG.
  • the traffic state change amount information generation unit 530 determines that the traffic state of the road section B20a during the period from the time “t2” to “t3”, that is, when the traffic light S20 is in the “green light” is “degree of improvement”. Is large. " Therefore, as shown in FIG. 9, the traffic condition change amount information generation unit 530 indicates that the traffic condition of the road section B20a when the lighting state of the traffic light S20 is “green light” indicates “the degree of improvement is large”. Traffic situation change amount information D30 is generated.
  • the traffic state change amount information generation unit 530 acquires a signal switching signal indicating that the lighting state has been switched to “green light” from the traffic light S20 at time “t2,” the time “ Based on the traffic condition index at “t2” and the traffic condition index at the time “t1” when the previous signal switching signal was acquired, the lighting state of the traffic light S20 is “red” during the period from the time “t1” to “t2”. Traffic condition change amount information D30 when it is “signal” is generated. In the example of FIG. 10, during the period from time “t1” to “t2”, the traffic volume is decreased, the traffic density is increased, and the average speed is decreased, but each is a change amount less than a predetermined value.
  • the traffic situation change amount information generation unit 530 determines that the traffic situation of the road section B20a during the period from time “t1” to “t2”, that is, when the lighting state of the traffic light S20 is “red light” is “deteriorating”. “Degree is small”. For this reason, as shown in FIG. 11, the traffic condition change amount information generation unit 530 indicates that the traffic condition of the road section B20a when the lighting state of the traffic light S20 is “red light” is “the degree of deterioration is small”.
  • the traffic state change amount information D30 shown is generated.
  • the traffic state change amount information generation unit 530 acquires a signal switching signal indicating that the lighting state is switched to the “yellow signal” from the traffic light S20 at the time “t3”, the traffic state index at the time “t3”. And the traffic from the time “t2” to the time “t3”, that is, traffic when the lighting state of the traffic light S20 is “green light” based on the traffic condition index at the time “t2” at which the previous signal switching signal was acquired.
  • the situation change amount information D30 is generated. In the example of FIG. 10, during the period from time “t2” to “t3”, the traffic volume increases, the traffic density decreases, and the average speed increases, but each is a change amount less than a predetermined value.
  • the traffic state change amount information generation unit 530 determines that the traffic state of the road section B20a during the period from the time “t2” to “t3”, that is, when the traffic light S20 is in the “green light” is “degree of improvement”. Is small. " Therefore, as shown in FIG. 11, the traffic condition change amount information generation unit 530 indicates that the traffic condition of the road section B20a when the lighting state of the traffic light S20 is “green light” indicates “the degree of improvement is small”. Traffic situation change amount information D30 is generated. When there is no change in the traffic condition index, the traffic condition change amount information generation unit 530 generates traffic condition change amount information D30 indicating “no change” as shown in FIG.
  • the traffic situation change amount information generation unit 530 determines that “no change” when the change amount of the traffic situation index is within a predetermined range. Each time the signal control device 50 acquires signal switching information from each traffic light S, the signal control device 50 repeatedly executes the process P50 and accumulates the traffic condition change amount information D30 in the recording medium 580.
  • the signal control device 50 performs a process P51 for controlling the traffic light S as shown in FIG.
  • the emergency vehicle information acquisition unit 540 acquires emergency vehicle information from the vehicle-mounted device A1 mounted on the emergency vehicle when the emergency vehicle travels for an emergency service (step S510).
  • the emergency vehicle information acquisition unit 540 is configured at predetermined intervals (in a period from when the emergency vehicle starts traveling for an emergency service until the service is completed (arrives at the destination)). For example, emergency vehicle information is acquired every 5 seconds.
  • the traffic state change amount information acquisition unit 550 acquires the traffic state change amount information D30 stored in the recording medium 580 (step S511). Specifically, when the emergency vehicle information acquisition unit 540 acquires emergency vehicle information in step S510, the traffic state change amount information acquisition unit 550 relates to each road section included in the “scheduled travel route” of the emergency vehicle information. The attached traffic condition change amount information D30 is acquired from the recording medium 580.
  • the signal control unit 560 selects a traffic light S that has a large effect of improving the traffic situation of the road section as a traffic signal to be controlled based on the emergency vehicle information and the traffic situation change amount information D30 (step S512). .
  • the signal control unit 560 is provided in each road section included in the “scheduled travel route” based on “location information” of emergency vehicle information and map data recorded in advance on the recording medium 580.
  • the traffic lights S to which the emergency vehicle has not reached are extracted. For example, it is assumed that the signal control unit 560 extracts the traffic light S20 (FIG. 2) provided in the road section B20a as one of the traffic lights S that the emergency vehicle has not reached.
  • the signal control unit 560 controls the traffic light S20 so as to be in a lighting state with a large effect of improving the traffic condition of the road section B20a. It is determined whether the effect of improving the traffic situation of B20a is large. In the example of FIG. 9, according to the traffic condition change amount information D30, when the lighting state of the traffic light S20 is “green light”, the traffic condition of the road section B20a is expected to be greatly improved (“improvement (large)”). Is done. For this reason, the signal control unit 560 determines that the effect of improving the traffic condition of the road section B20a is large by setting the lighting state of the traffic light S20 to “green light”.
  • the signal control unit 560 selects the traffic light S20 as a traffic signal to be controlled.
  • the traffic condition change amount information D30 when the lighting state of the traffic light S20 is “green light”, the traffic condition of the road section B20a is improved, but the improvement degree is small (“improvement” (Small) ”) is expected.
  • the signal control unit 560 determines that the effect of improving the traffic condition of the road section B20a is small even when the lighting state of the traffic light S20 is set to “green light”.
  • the signal control unit 560 determines that the control of the traffic light S20 is unnecessary, and does not select the traffic light S as a control target traffic light.
  • the signal control unit 560 makes such a determination for all the traffic lights S that have not yet reached the emergency vehicle, and selects the traffic lights S to be controlled.
  • the signal control unit 560 controls the traffic light S to be controlled selected in step S512 (step S513).
  • the traffic condition change amount information D30 when the lighting state of the traffic light S20 is “green light”, the traffic condition of the road section B20a is greatly improved (“improvement (large)”). is expected. For this reason, the signal control unit 560 controls the traffic light S20 so that the lighting state of the traffic light S20 becomes “green light”.
  • the signal control unit 560 indicates the traffic light S20. Transmit signal control information including a command to switch to “green light”.
  • the signal control unit 560 performs predetermined processing on the traffic light S20.
  • Signal control information including an instruction to extend the lighting state of the “blue light” is transmitted for an extension time (for example, 10 seconds).
  • the signal control unit 560 may estimate the time when the emergency vehicle passes the traffic light S20 based on the “position information” and the “movement speed” included in the emergency vehicle information. Then, the signal control unit 560 may set the extension time so that the lighting state of the “blue light” is continued until the time when the emergency vehicle is predicted to pass the traffic light S20.
  • the signal control unit 560 determines how many seconds later the emergency vehicle reaches the road section where the traffic signal S to be controlled is provided, based on the “position information” and “movement speed” included in the emergency vehicle information.
  • the signal control information may be transmitted a predetermined time before the emergency vehicle reaches the road section (for example, 10 seconds before).
  • the signal control unit 560 displays the signal control information when the emergency vehicle reaches a predetermined distance (for example, 100 meters before) reaching the road section based on the “position information” included in the emergency vehicle information. You may make it transmit.
  • the signal control unit 560 transmits signal control information including a lighting state switching command or includes a lighting state extension command according to the lighting state of the traffic light S at the time of transmitting the signal control information. Determine whether to send signal control information.
  • the signal control part 560 can improve the traffic condition of the said road area, before an emergency vehicle actually drive
  • the signal control device 50 repeatedly executes the process P51 until the emergency vehicle completes the service (arrives at the destination). As a result, the signal control device 50 can change the emergency vehicle information and the traffic situation each time, even if the planned travel route of the emergency vehicle is changed or the traffic situation of the road section changes due to an accident or the like. Based on the quantity information D30, the control can be performed by appropriately selecting the traffic light S to be controlled.
  • FIG. 14 is a diagram illustrating an example of a hardware configuration of a signal control device according to an embodiment of the present invention.
  • an example of a hardware configuration of the signal control device 50 of the present embodiment will be described with reference to FIG.
  • the computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, an input / output interface 904, and a communication interface 905.
  • the signal control device 50 described above is mounted on the computer 900.
  • the operation of each processing unit described above is stored in the auxiliary storage device 903 in the form of a program.
  • the CPU 901 reads a program from the auxiliary storage device 903, develops it in the main storage device 902, and executes the above processing according to the program.
  • the CPU 901 ensures a storage area corresponding to the recording medium 460 in the main storage device 902 according to the program.
  • the CPU 901 ensures a storage area for storing data being processed in the auxiliary storage device 903 according to the program.
  • the computer 900 may be connected to the external storage device 910 via the input / output interface 904, and a storage area corresponding to the recording medium 580 may be secured in the external storage device 910. Further, the computer 900 may be connected to the external storage device 920 via the communication interface 905, and a storage area corresponding to the recording medium 580 may be secured in the external storage device 920.
  • the auxiliary storage device 903 is an example of a tangible medium that is not temporary.
  • Other examples of the tangible medium that is not temporary include a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, and a semiconductor memory connected via the input / output interface 904.
  • this program is distributed to the computer 900 via a communication line, the computer 900 that has received the distribution may develop the program in the main storage device 902 and execute the above processing.
  • the program may be for realizing a part of the functions described above. Further, the program may be a so-called difference file (difference program) that realizes the above-described function in combination with another program already stored in the auxiliary storage device 903.
  • difference file difference program
  • the signal control device 50 may be constituted by a single computer 900 or may be constituted by a plurality of computers connected so as to be communicable.
  • each function of the signal control device 50 may be included in the traffic condition index generation unit 20.
  • the signal control device 50 includes the emergency vehicle information acquisition unit 540 that acquires emergency vehicle information including the position information of the emergency vehicle, and the amount of change in the traffic situation according to the lighting state of the traffic light. Based on the traffic situation change amount information acquisition unit 550 that acquires the traffic situation change amount information D30 shown for each road section, the emergency vehicle information, and the traffic situation change amount information D30, the road section where the emergency vehicle travels is determined. And a signal control unit 560 that controls the traffic light S provided.
  • the signal control part 560 is based on the traffic condition variation
  • the traffic light S so that the emergency vehicle can preferentially and smoothly travel, there is a possibility that traffic on other road sections where the emergency vehicle does not travel is restricted and the traffic situation deteriorates. is there.
  • the signal control unit 560 does not control the traffic light S for the road section where the traffic situation is expected not to be improved even if the traffic light S of the road section on which the emergency vehicle travels is controlled.
  • the influence on the traffic situation of a section can be controlled.
  • the emergency vehicle information includes a planned travel route of the emergency vehicle.
  • the traffic state change amount information acquisition unit 550 acquires the traffic state change amount information D30 of each road section included in the planned travel route of the emergency vehicle information.
  • the signal control unit 560 is provided in each road section before the emergency vehicle reaches each road section based on the emergency vehicle information and the traffic condition change amount information D30 of each road section included in the planned travel route.
  • the received traffic light S is controlled.
  • the signal control unit 560 performs control based on the “position information” and “movement speed” included in the emergency vehicle information before a predetermined time or a predetermined distance before the emergency vehicle reaches the road section.
  • the target traffic light S is controlled.
  • the signal control device 50 also acquires a signal switching information acquisition unit 510 that acquires signal switching information indicating that the lighting state of the traffic light S has been switched, and a traffic situation that acquires a traffic condition index of a road section where the traffic signal S is provided.
  • the road on which the traffic signal S is provided based on the traffic condition index at the time when the signal acquisition information is acquired from the traffic light indicator S and the traffic condition index at the time when the previous signal switching information is acquired from the traffic light S.
  • a traffic condition change amount information generation unit 530 that generates the traffic condition change amount information D30 of the section; In this way, by generating the traffic situation change amount information D30 every time the traffic light is switched on, the traffic situation change amount information generation unit 530 can change the actual road section due to various factors such as date and time, weather, and accidents. Even when the traffic situation changes, the traffic situation change amount information D30 following such a change can be generated in real time. As a result, the signal control unit 560 can accurately select and control the traffic light S that has a large effect of improving the road condition according to the traffic condition of the actual road section.
  • the emergency vehicle information acquisition unit 540 acquires emergency vehicle information from the emergency vehicle until the emergency vehicle completes the service (arrives at the destination).
  • the traffic situation change amount information acquisition unit 550 acquires the traffic situation change amount information D30 from the recording medium 580 every time the emergency vehicle information acquisition unit 540 acquires emergency vehicle information.
  • the signal control part 560 repeats the process which selects and controls the traffic light S with the big effect of improving the traffic condition of a road area based on emergency vehicle information and traffic condition change amount information D30. By doing in this way, the signal control device 50 can provide emergency vehicle information every time, even when the planned travel route of the emergency vehicle is changed, or when the traffic situation of the road section changes due to an accident or the like.
  • the traffic condition change amount information D30 it is possible to accurately select and control the traffic light S that has a large effect of improving the road condition.
  • the signal control device 50 is configured so that the restriction information of the restriction target road section in which traffic restriction such as traffic is prohibited by the signal control unit 560 controlling the traffic light S is located in the restriction target road section.
  • a regulation information transmission unit 570 that transmits to at least one of the on-vehicle device A2 and the regulation information notification unit G mounted on the vehicle is provided.
  • the regulation information transmission part 570 can make the driver
  • the regulation information transmission unit 570 makes the emergency vehicle driver recognize the lighting state of the traffic light S on the planned travel route, the traffic condition of the road section, etc., and provide support for the emergency vehicle to travel smoothly. Can do.
  • the regulation information transmission unit 570 causes the driver of the general vehicle to recognize the road section where the emergency vehicle is scheduled to travel and the road section subject to the regulation, and invites an action such as traveling while avoiding these road sections. Can do.
  • the restriction information transmission unit 570 enables the emergency vehicle to travel smoothly with priority, and can reduce the possibility of traffic congestion and the like in the restricted road section, resulting in a worsening of traffic conditions.
  • the signal control system 1 includes a signal control device 50, a probe data collection unit 10 that collects probe data including position information of the vehicle-mounted device A mounted in each of a plurality of vehicles, and a road based on the probe data.
  • a traffic condition index generation unit 20 that generates a traffic condition index for each section and records it in the traffic condition database 30.
  • generation part 20 can produce
  • the traffic condition index generation unit 20 can increase the accuracy of the traffic condition index.
  • the signal control device 50 can accurately select and control the traffic light S having a large effect of improving the road condition based on the traffic condition index with high accuracy.
  • the signal control unit 560 has described the aspect in which the control is performed by selecting the traffic signal S that has a large effect of improving the traffic condition of the road section as the traffic signal to be controlled. There is nothing. For example, when the traffic condition of the road section is improved by controlling the traffic light S, the signal control unit 560 selects the traffic light S as the traffic signal to be controlled even if the improvement effect is small. Control may be performed.
  • standard selected as a traffic signal of a control object for every road area. For example, in a road section where the traffic volume is a predetermined value or more, only the traffic light S having a large improvement effect is selected and controlled, and in a road section where the traffic volume is less than a predetermined value, the improvement effect is small.
  • the signal S may be selected as a control target signal to perform control.
  • the traffic situation of the road section where the emergency vehicle travels is improved and the influence on the traffic situation of the road section where the emergency vehicle does not travel is suppressed. It is possible.
  • Signal Control System 10 Probe Data Collection Unit 20 Traffic Situation Index Generation Unit 30 Traffic Situation Database 50
  • Signal Control Device 510 Signal Switching Information Acquisition Unit 520 Traffic Situation Index Acquisition Unit 530 Traffic Situation Change Information Generation Unit 540
  • Emergency Vehicle Information Acquisition Unit 550 Traffic state change amount information acquisition unit 560
  • Signal control unit 570 Regulation information transmission unit 580 Recording medium 900
  • Computer 901 CPU 902 Main storage device 903 Auxiliary storage device 904 Input / output interface 905 Communication interface 910 External storage device 920 External storage device A On-vehicle device A1 On-vehicle device (emergency vehicle) A2 On-board device (general vehicle) G regulation information notification part NW network S traffic light

Abstract

A signal control device (50) is provided with: an emergency vehicle information acquisition unit (540) that acquires emergency vehicle information including position information for an emergency vehicle; a traffic state change amount information acquisition unit (550) that acquires traffic state change amount information indicating, for each of road segments, the amount of change in a traffic state according to the lighting state of traffic lights; and a signal control unit (560) that uses the emergency vehicle information and the traffic state change amount information as a basis to perform control of the traffic lights provided in a road segment in which the emergency vehicle travels.

Description

信号管制装置、信号管制システム、信号管制方法及びプログラムSignal control device, signal control system, signal control method and program
　本発明は、信号管制装置、信号管制システム、信号管制方法及びプログラムに関する。
　本願は、２０１６年７月２６日に日本に出願された特願２０１６－１４６５９１号について優先権を主張し、その内容をここに援用する。 The present invention relates to a signal control device, a signal control system, a signal control method, and a program.
This application claims priority on Japanese Patent Application No. 2016-146591 filed in Japan on July 26, 2016, the contents of which are incorporated herein by reference.
　緊急車両が迅速に目的地に到達することを支援するシステムとして、緊急車両の現在位置を指令センターサーバに送信するとともに、指令センターサーバで当該緊急車両の走行経路上の通過前の信号機を制御することにより、当該緊急車両が迅速に走行できるようにするシステムが提案されている（例えば特許文献１）。 As a system that supports the emergency vehicle to reach the destination quickly, the current position of the emergency vehicle is transmitted to the command center server, and the command center server controls the traffic light before passing through the travel route of the emergency vehicle. Thus, a system that allows the emergency vehicle to travel quickly has been proposed (for example, Patent Document 1).
特開２００４－２５２８５４号公報JP 2004-252854 A
　しかしながら、上述のシステムでは、緊急車両の走行経路上に設けられた信号機に対し、青信号に変える、又は、青信号を維持する等の制御が一律で行われる。このようなシステムでは、例えば、走行経路上のある道路区間において渋滞等が発生している場合、当該道路区間に設けられた信号機を青信号に変える等の制御が行われたとしても、当該道路区間の交通流等の交通状況が改善しない可能性がある。つまり、このような道路区間では、緊急車両が迅速に走行できるという効果が得られないにもかかわらず、信号機を青信号に変える等の制御が行われる可能性がある。そうすると、緊急車両の走行経路に含まれない他の道路区間の信号機が赤信号となる時間が増加するため、他の道路区間の交通流を阻害して、かえって渋滞が引き起こされる等の悪影響が生じる可能性がある。 However, in the above-described system, control such as changing to a green signal or maintaining a green signal is uniformly performed on the traffic light provided on the travel route of the emergency vehicle. In such a system, for example, when traffic congestion occurs in a certain road section on the travel route, even if control such as changing a traffic light provided in the road section to a green light is performed, the road section There is a possibility that traffic conditions such as traffic flow will not improve. That is, in such a road section, there is a possibility that control such as changing the traffic light to a green light may be performed even though the effect that the emergency vehicle can travel quickly cannot be obtained. This increases the time during which traffic lights on other road sections that are not included in the travel route of the emergency vehicle turn red, thus adversely affecting traffic flow on other road sections and causing traffic jams. there is a possibility.
　本発明は、このような課題に鑑みてなされたものあって、緊急車両が走行する道路区間の交通状況を改善するとともに、緊急車両が走行しない道路区間の交通状況への影響を抑制することが可能な信号管制装置、信号管制システム、信号管制方法及びプログラムを提供する。 The present invention has been made in view of such a problem, and improves the traffic situation of a road section on which an emergency vehicle travels and suppresses the influence on the traffic situation of a road section on which the emergency vehicle does not travel. A signal control device, a signal control system, a signal control method, and a program are provided.
　上記課題を解決するため、本発明は以下の手段を採用している。
　本発明の一態様によれば、信号管制装置は、緊急車両の位置情報を含む緊急車両情報を取得する緊急車両情報取得部と、信号機の点灯状態に応じた交通状況の変化量を道路区間別に示す交通状況変化量情報を取得する交通状況変化量情報取得部と、前記緊急車両情報と、前記交通状況変化量情報とに基づいて、前記緊急車両が走行する道路区間に設けられた前記信号機の制御を行う信号制御部と、を備える。
　このようにすることで、信号制御部は、交通状況変化量情報に基づいて、緊急車両が走行する道路区間に設けられた信号機のうち、各信号機の点灯状態に応じて道路区間の交通状況を改善することが予想される信号機のみを選択して制御する。これにより、信号制御部は、緊急車両が優先的にスムーズに走行できるように、緊急車両が走行する道路区間の交通状況を改善させることができる。
　また、緊急車両が優先的にスムーズに走行できるように信号機を制御することで、緊急車両が走行しない他の道路区間における交通が規制されて交通状況が悪化する等の影響が生じる可能性がある。しかしながら、信号制御部は、緊急車両が走行する道路区間の信号機の制御を行っても交通状況が改善されないと予想される道路区間については、当該信号機の制御行わないため、他の道路区間の交通状況への影響を抑制することができる。 In order to solve the above problems, the present invention employs the following means.
According to one aspect of the present invention, the signal control device includes an emergency vehicle information acquisition unit that acquires emergency vehicle information including position information of an emergency vehicle, and a traffic state change amount according to a lighting state of the traffic light for each road section. A traffic condition change amount information acquisition unit for acquiring the traffic condition change amount information shown, the emergency vehicle information, and the traffic condition change amount information of the traffic light provided in the road section on which the emergency vehicle travels. A signal control unit that performs control.
By doing in this way, the signal control unit, based on the traffic condition change amount information, out of the traffic lights provided in the road section on which the emergency vehicle travels, the traffic condition of the road section is determined according to the lighting state of each traffic light. Select and control only traffic lights that are expected to improve. Thereby, the signal control part can improve the traffic condition of the road area where an emergency vehicle drive | works so that an emergency vehicle can drive smoothly preferentially.
In addition, by controlling the traffic lights so that emergency vehicles can preferentially and smoothly travel, traffic on other road sections where emergency vehicles do not travel may be restricted and traffic conditions may deteriorate. . However, the signal control unit does not control the traffic signal for the road segment in which the traffic situation is expected not to be improved even if the traffic signal of the road segment on which the emergency vehicle travels is controlled. The influence on the situation can be suppressed.
　本発明の一態様によれば、上述の態様の信号管制装置において、前記緊急車両情報は、前記緊急車両の走行予定経路を更に含み、前記交通状況変化量情報取得部は、前記走行予定経路に含まれる各道路区間の前記交通状況変化量情報を取得し、前記信号制御部は、前記緊急車両情報と、前記走行予定経路に含まれる各道路区間の交通状況変化量情報とに基づいて、前記緊急車両が各道路区間に到達する前に、各道路区間に設けられた前記信号機の制御を行う。
　このようにすることで、信号制御部は、緊急車両の走行予定経路に含まれる道路区間の交通状況を、緊急車両が各道路区間を走行する前に改善することができる。この結果、信号管制装置は、緊急車両を迅速且つスムーズに走行させることができる。 According to an aspect of the present invention, in the signal control device according to the aspect described above, the emergency vehicle information further includes a planned travel route of the emergency vehicle, and the traffic state change amount information acquisition unit includes the planned travel route. The traffic condition change amount information of each road section included is acquired, the signal control unit based on the emergency vehicle information and the traffic condition change amount information of each road section included in the planned travel route, Before the emergency vehicle reaches each road section, the traffic light provided in each road section is controlled.
By doing in this way, the signal control part can improve the traffic condition of the road section included in the driving planned route of an emergency vehicle, before an emergency vehicle drive | works each road section. As a result, the signal control device can cause the emergency vehicle to travel quickly and smoothly.
　本発明の一態様によれば、上述の態様の信号管制装置は、前記信号機の点灯状態が切り替わったことを示す信号切替情報を取得する信号切替情報取得部と、前記信号機が設けられた道路区間の交通状況指標を取得する交通状況指標取得部と、前記信号機から前記信号切替情報を取得した時点における前記交通状況指標と、当該信号機から前回の信号切替情報を取得した時点における前記交通状況指標とに基づいて、当該信号機が設けられた道路区間の交通状況変化量情報を生成する交通状況変化量情報生成部と、を更に備える。
　このように、信号機の点灯状態が切り替わる度に交通状況変化量情報を生成することにより、交通状況変化量情報生成部は、日時、天候、事故等の様々な要因により現実の道路区間の交通状況が変化した場合であっても、このような変化に追従した交通状況変化量情報をリアルタイムに生成することができる。この結果、信号制御部は、現実の道路区間の交通状況に応じて、道路状況を改善する効果が大きい信号機を精度よく選択して制御することができる。 According to one aspect of the present invention, the signal control device according to the above aspect includes a signal switching information acquisition unit that acquires signal switching information indicating that the lighting state of the traffic signal has been switched, and a road section in which the traffic signal is provided. A traffic condition index acquisition unit for acquiring the traffic condition index, the traffic condition index when the signal switching information is acquired from the traffic light, and the traffic condition index when the previous signal switching information is acquired from the traffic light, And a traffic condition change amount information generation unit that generates traffic condition change amount information of the road section where the traffic signal is provided.
In this way, by generating traffic status change amount information every time the traffic light is switched on, the traffic status change amount information generating unit can be used for various traffic conditions such as date, weather, accidents, etc. Even when the change occurs, traffic situation change amount information that follows such a change can be generated in real time. As a result, the signal control unit can accurately select and control a traffic light having a large effect of improving the road condition according to the traffic condition of the actual road section.
　本発明の一態様によれば、上述の態様の信号管制装置は、前記信号制御部が前記信号機の制御を行うことによって交通規制が行われる規制対象道路区間の規制情報を、当該規制対象道路区間に位置する車両に搭載された車載器、及び、前記道路区間に設けられた規制情報通知部の少なくとも一方へ送信する、規制情報送信部を更に備える。
　このようにすることで、規制情報送信部は、車両の運転者に対し、緊急車両の走行に伴う規制情報を認識させることができる。これにより、規制情報送信部は、緊急車両の運転者に走行予定経路における信号機の点灯状態、道路区間の交通状況等を認識させて、緊急車両がスムーズに走行するための支援を行うことができる。また、規制情報送信部は、一般車両の運転者に緊急車両が走行する予定の道路区間及び規制対象道路区間を認識させて、これらの道路区間を避けて走行する等の行動を誘引することができる。この結果、規制情報送信部は、緊急車両が優先的にスムーズに走行できるようにするとともに、規制対象道路区間において、渋滞等が生じて交通状況が悪化する可能性を低減させることができる。 According to one aspect of the present invention, in the signal control device according to the above aspect, the restriction information on the restriction target road section in which traffic restriction is performed when the signal control unit controls the traffic light is transmitted to the restriction target road section. It further includes a regulation information transmission unit that transmits to at least one of the vehicle-mounted device mounted on the vehicle located in the vehicle and the regulation information notification unit provided in the road section.
By doing in this way, the regulation information transmission part can make the driver | operator of a vehicle recognize the regulation information accompanying driving | running | working of an emergency vehicle. Thereby, the regulation information transmission part can make the driver of the emergency vehicle recognize the lighting state of the traffic light on the planned travel route, the traffic condition of the road section, and the like, and can assist the emergency vehicle to travel smoothly. . In addition, the regulation information transmission unit may cause a driver of a general vehicle to recognize a road section where an emergency vehicle is scheduled to travel and a road section subject to regulation, and induce an action such as traveling while avoiding these road sections. it can. As a result, the restriction information transmission unit can make emergency vehicles run smoothly with priority, and can reduce the possibility that traffic conditions will deteriorate due to traffic jams or the like in the restriction target road section.
　本発明の一態様によれば、信号管制システムは、上述の何れか一の態様に記載の信号管制装置と、複数の車両のそれぞれに搭載された車載器の位置情報を含むプローブデータを収集するプローブデータ収集部と、前記プローブデータに基づいて、道路区間別の交通状況指標を生成して交通状況データベースに記録する交通状況指標生成部と、を備える。
　このようにすることで、交通状況指標生成部は、プローブデータ収集部が逐次収集するプローブデータに基づいて現実の道路区間の状況に応じた交通状況指標を生成することができる。このため、交通状況指標生成部は、交通状況指標の精度を高めることができる。
また、信号管制装置は、このように精度の高い交通状況指標に基づいて、道路状況を改善する効果が大きい信号機を精度よく選択して制御することができる。 According to one aspect of the present invention, a signal control system collects probe data including position information of the signal control device according to any one of the above aspects and an on-vehicle device mounted on each of a plurality of vehicles. A probe data collection unit; and a traffic condition index generation unit that generates a traffic condition index for each road section based on the probe data and records the traffic condition index in a traffic condition database.
By doing in this way, the traffic condition parameter | index production | generation part can produce | generate the traffic condition parameter | index according to the condition of the actual road area based on the probe data which a probe data collection part collects sequentially. For this reason, the traffic condition index generation unit can improve the accuracy of the traffic condition index.
Further, the signal control device can accurately select and control a traffic light having a large effect of improving the road condition based on the highly accurate traffic condition index.
　本発明の一態様によれば、信号管制方法は、緊急車両の位置情報を含む緊急車両情報を取得する緊急車両情報取得ステップと、信号機の点灯状態に応じた交通状況の変化量を道路区間別に示す交通状況変化量情報を取得する交通状況変化量情報取得ステップと、前記緊急車両情報と、前記交通状況変化量情報とに基づいて、前記緊急車両が走行する道路区間に設けられた前記信号機の制御を行う信号制御ステップと、を有する。 According to one aspect of the present invention, a signal control method includes an emergency vehicle information acquisition step of acquiring emergency vehicle information including position information of an emergency vehicle, and a traffic state change amount according to a lighting state of a traffic light for each road section. A traffic situation change amount information acquisition step for obtaining the traffic situation change amount information shown, the emergency vehicle information, and the traffic situation change amount information; And a signal control step for performing control.
　本発明の一態様によれば、プログラムは、信号管制装置のコンピュータを、緊急車両の位置情報を含む緊急車両情報を取得する緊急車両情報取得部、信号機の点灯状態に応じた交通状況の変化量を道路区間別に示す交通状況変化量情報を取得する交通状況変化量情報取得部、前記緊急車両情報と、前記交通状況変化量情報とに基づいて、前記緊急車両が走行する道路区間に設けられた前記信号機の制御を行う信号制御部、として機能させる。 According to one aspect of the present invention, a program uses a computer of a signal control device, an emergency vehicle information acquisition unit that acquires emergency vehicle information including position information of an emergency vehicle, and a change amount of a traffic situation according to a lighting state of a traffic light. The traffic situation change amount information acquisition unit for obtaining traffic situation change amount information indicating the road section, the emergency vehicle information, and the traffic situation change amount information, provided in the road section on which the emergency vehicle travels It functions as a signal control unit that controls the traffic light.
　上述の信号管制装置、信号管制システム、信号管制方法及びプログラムによれば、緊急車両が走行する道路区間の交通状況を改善するとともに、緊急車両が走行しない道路区間の交通状況への影響を抑制することが可能である。 According to the signal control device, the signal control system, the signal control method and the program described above, the traffic situation of the road section where the emergency vehicle travels is improved and the influence on the traffic situation of the road section where the emergency vehicle does not travel is suppressed. It is possible.
本発明の一実施形態に係る信号管制システムの全体構成を示す図である。It is a figure showing the whole signal control system composition concerning one embodiment of the present invention. 本発明の一実施形態に係る道路区間の例を示す図である。It is a figure which shows the example of the road area which concerns on one Embodiment of this invention. 本発明の一実施形態に係る交通状況指標生成部の機能を示す図である。It is a figure which shows the function of the traffic condition parameter | index production | generation part which concerns on one Embodiment of this invention. 本発明の一実施形態に係る交通状況指標生成部の処理フローを示す第１の図である。It is a 1st figure which shows the processing flow of the traffic condition parameter | index production | generation part which concerns on one Embodiment of this invention. 本発明の一実施形態に係る交通状況指標生成部の処理フローを示す第２の図である。It is a 2nd figure which shows the processing flow of the traffic condition parameter | index production | generation part which concerns on one Embodiment of this invention. 本発明の一実施形態に係る交通状況指標生成部の処理フローを示す第３の図である。It is a 3rd figure which shows the processing flow of the traffic condition parameter | index production | generation part which concerns on one Embodiment of this invention. 本発明の一実施形態に係る信号管制装置の機能構成を示す図である。It is a figure which shows the function structure of the signal control apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る信号管制装置の機能を説明する第１の図である。It is a 1st figure explaining the function of the signal control apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る交通状況変化量情報の例を示す第１の図である。It is a 1st figure which shows the example of the traffic condition change amount information which concerns on one Embodiment of this invention. 本発明の一実施形態に係る信号管制装置の機能を説明する第２の図である。It is a 2nd figure explaining the function of the signal control apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る交通状況変化量情報の例を示す第２の図である。It is a 2nd figure which shows the example of the traffic condition change amount information which concerns on one Embodiment of this invention. 本発明の一実施形態に係る信号管制装置の処理フローを示す第１の図である。It is a 1st figure which shows the processing flow of the signal control apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る信号管制装置の処理フローを示す第２の図である。It is a 2nd figure which shows the processing flow of the signal control apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る信号管制装置のハードウェア構成の例を示す図である。It is a figure which shows the example of the hardware constitutions of the signal control apparatus which concerns on one Embodiment of this invention.
　以下、本発明の一実施形態に係る信号管制システム１について、図１～図１４を参照しながら説明する。 Hereinafter, a signal control system 1 according to an embodiment of the present invention will be described with reference to FIGS.
（信号管制システムの全体構成）
　図１は、本発明の一実施形態に係る信号管制システムの全体構成を示す図である。
　図１に示すように、本実施形態の信号管制システム１は、インターネット等のネットワークＮＷを介して通信可能に接続されたプローブデータ収集部１０と、交通状況指標生成部２０と、交通状況データベース３０と、信号管制装置５０と、を備えている。
　なお、プローブデータ収集部１０、交通状況指標生成部２０、交通状況データベース３０及び信号管制装置５０は、ＬＡＮ（Local Area Network）等の専用線で通信可能に接続されていてもよい。 (Overall configuration of signal control system)
FIG. 1 is a diagram showing an overall configuration of a signal control system according to an embodiment of the present invention.
As shown in FIG. 1, the signal control system 1 of the present embodiment includes a probe data collection unit 10, a traffic condition index generation unit 20, and a traffic condition database 30 that are communicably connected via a network NW such as the Internet. And a signal control device 50.
Note that the probe data collection unit 10, the traffic condition index generation unit 20, the traffic condition database 30, and the signal control device 50 may be communicably connected via a dedicated line such as a LAN (Local Area Network).
　プローブデータ収集部１０は、所定時間ごと（例えば１秒ごと）に、車両に搭載された車載器ＡからネットワークＮＷを介して送信されるプローブデータ（車載器プローブデータ）を収集する。本実施形態において、特に記載がない限り、「車載器Ａ」は緊急車両に搭載された車載器Ａ１と、緊急車両以外の一般車両に搭載された車載器Ａ２とを含む。また、「車両」は緊急車両と一般車両とを含む。
　緊急車両とは、救急車、消防車、警察車両等、緊急の用務のために迅速に目的地に到達することが要求される車両であって、信号機Ｓの点灯状態等に応じて停止しなければならない地点においても、停止することを要しない車両である。なお、信号機Ｓの点灯状態とは、例えば、各信号機が「赤信号（進行禁止信号）」、「青信号（進行可能信号）」、「黄信号（停止信号）」等の何れの信号を表示しているかを示す。
　また、一般車両とは、緊急車両以外の全ての車両であり、信号機Ｓの点灯状態等に応じて停止することを要する車両である。 The probe data collection unit 10 collects probe data (on-vehicle device probe data) transmitted from the vehicle-mounted device A mounted on the vehicle via the network NW at every predetermined time (for example, every second). In this embodiment, unless otherwise specified, the “onboard device A” includes an onboard device A1 mounted on an emergency vehicle and an onboard device A2 mounted on a general vehicle other than the emergency vehicle. “Vehicle” includes emergency vehicles and general vehicles.
An emergency vehicle is a vehicle such as an ambulance, fire truck, police vehicle, etc. that is required to reach its destination quickly for emergency services, and must be stopped according to the lighting state of the traffic light S, etc. It is a vehicle that does not need to stop even at a point where it does not. In addition, the lighting state of the traffic light S indicates, for example, any signal such as “red signal (progress inhibition signal)”, “blue signal (progress signal)”, “yellow signal (stop signal)”. Indicates whether
Moreover, a general vehicle is all vehicles other than an emergency vehicle, and is a vehicle which needs to stop according to the lighting state of the traffic light S, etc.
　プローブデータには、「送信日時」、「機器種別」、「機器ＩＤ」、「位置情報」、「移動速度」等が含まれている。
　「送信日時」は、プローブデータが車載器Ａ１又は車載器Ａ２から送信された日時を示す情報である。「機器種別」は、プローブデータの送信元が車載器Ａ１（緊急車両）であるか車載器Ａ２（一般車両）であるかを特定するための情報である。「機器ＩＤ」は、プローブデータの送信元である車載器Ａ１又は車載器Ａ２を特定可能な情報である。なお、「機器ＩＤ」で車載器Ａ１（緊急車両）と車載器Ａ２（一般車両）とが識別可能である場合は、「機器種別」は省略し、「機器ＩＤ」に基づいてプローブデータの送信元が車載器Ａ１であるか車載器Ａ２であるか特定するようにしてもよい。「位置情報」は、プローブデータが送信された日時における、車載器Ａ１が搭載された緊急車両又は車載器Ａ２が搭載された一般車両が位置する地点（緯度、経度等）を示す情報である。「移動速度」は、プローブデータが送信された日時における、車載器Ａ１が搭載された緊急車両又は車載器Ａ２が搭載された一般車両の走行速度（ｍ／ｓ）を示す情報である。 The probe data includes “transmission date and time”, “device type”, “device ID”, “position information”, “movement speed”, and the like.
“Transmission date and time” is information indicating the date and time when the probe data is transmitted from the vehicle-mounted device A1 or the vehicle-mounted device A2. “Equipment type” is information for specifying whether the transmission source of the probe data is the vehicle-mounted device A1 (emergency vehicle) or the vehicle-mounted device A2 (general vehicle). The “apparatus ID” is information that can identify the in-vehicle device A1 or the in-vehicle device A2 that is the transmission source of the probe data. If the on-board device A1 (emergency vehicle) and the on-board device A2 (general vehicle) can be identified by the “device ID”, the “device type” is omitted, and probe data is transmitted based on the “device ID”. You may make it identify whether the origin is onboard equipment A1 or onboard equipment A2. “Position information” is information indicating a point (latitude, longitude, etc.) where an emergency vehicle equipped with the vehicle-mounted device A1 or a general vehicle equipped with the vehicle-mounted device A2 is located at the date and time when the probe data was transmitted. “Movement speed” is information indicating the traveling speed (m / s) of an emergency vehicle equipped with the vehicle-mounted device A1 or a general vehicle equipped with the vehicle-mounted device A2 at the date and time when the probe data was transmitted.
　図２は、本発明の一実施形態に係る道路区間の例を示す図である。
　交通状況指標生成部２０は、プローブデータ収集部１０が収集したプローブデータに基づいて、所定時間ごと（例えば１秒ごと）に、道路区間別の交通状況指標を生成する。
　道路区間とは、図２に示すように、道路上の複数の交通結節点（交差点等）のそれぞれに設定されたノードのうち、隣接する二点のノード間の領域を示す。各道路区間には、道路区間を特定可能な「リンクＩＤ」が付されている。例えば、図２に示すように、二つのノード（交差点）間の領域であって、一方へ向かう車線を示す道路区間にはリンクＩＤ「Ｂ２０ａ」が付されており、他方へ向かう車線を示す道路区間にはリンクＩＤ「Ｂ２０ｂ」が付されている。なお、交通結節点間の距離が所定距離（例えば１００メートル）よりも長い場合は、更に所定距離ごとにノードを設定するようにしてもよい。本実施形態では、交通状況指標生成部２０は、「リンクＩＤ」と、道路区間の位置（例えば、道路区間の始点及び終点の緯度及び経度）を示す「道路区間位置情報」と、「道路区間の長さ」と、当該道路区間に設けられた信号機Ｓの情報（信号機Ｓを特定可能な信号機ＩＤ、信号機Ｓの設置位置等）を示す「信号機情報」とが関連付られた地図データを予め有している。
　交通状況指標とは、道路区間内における車両の交通状況を示す情報である。本実施形態では、交通状況指標には、「交通量」、「交通密度」及び「平均速度」が含まれている。
「交通量」は、道路区間内における１秒あたりの車両の通行台数（台／秒）を示す。「交通密度」は、道路区間内における１メートルあたりの車両台数（台／ｍ）を示す。「平均速度」は、道路区間内を走行中の車両の平均移動速度（ｍ／ｓ）を示す。
　また、交通状況指標生成部２０は、交通状況指標を演算する際に用いたプローブデータに基づいて、道路区間（リンクＩＤ）と、当該道路区間に位置する車載器Ａの情報（プローブデータの一部）とが関連付けられたデータを、交通状況データベース３０の交通状況テーブルに追加して更新する。交通状況テーブルには、各プローブデータの「送信日時」と、各プローブデータの送信元である車載器Ａの「機器種別」、「機器ＩＤ」及び「位置情報」と、車載器Ａが搭載された車両が位置する道路区間の「リンクＩＤ」と、が関連付けられて記録されている。 FIG. 2 is a diagram illustrating an example of a road section according to an embodiment of the present invention.
The traffic condition index generation unit 20 generates a traffic condition index for each road section at predetermined time intervals (for example, every second) based on the probe data collected by the probe data collection unit 10.
As shown in FIG. 2, the road section indicates a region between two adjacent nodes among nodes set at each of a plurality of traffic nodes (intersections and the like) on the road. Each road section is given a “link ID” that can identify the road section. For example, as shown in FIG. 2, a road section indicating a lane heading to the other side has a link ID “B20a” attached to a road section indicating a lane heading to one side, which is an area between two nodes (intersections). A link ID “B20b” is attached to the section. In addition, when the distance between traffic nodes is longer than a predetermined distance (for example, 100 meters), a node may be set for each predetermined distance. In the present embodiment, the traffic condition index generation unit 20 includes “link ID”, “road section position information” indicating the position of the road section (for example, the latitude and longitude of the start point and end point of the road section), and “road section Map data associated with “the length of the traffic light” and “the traffic light information” indicating the information of the traffic light S provided in the road section (the traffic light ID that can identify the traffic light S, the installation position of the traffic light S, etc.) in advance. Have.
The traffic condition index is information indicating the traffic condition of the vehicle in the road section. In the present embodiment, the traffic condition index includes “traffic volume”, “traffic density”, and “average speed”.
The “traffic volume” indicates the number of vehicles passing per second (units / second) in the road section. “Traffic density” indicates the number of vehicles per meter (units / m) in a road section. “Average speed” indicates an average moving speed (m / s) of a vehicle traveling in a road section.
In addition, the traffic condition index generation unit 20 based on the probe data used when calculating the traffic condition index, information on the road section (link ID) and the vehicle-mounted device A located in the road section (one of the probe data). To the traffic situation table of the traffic situation database 30 and updated. The traffic situation table includes “transmission date and time” of each probe data, “device type”, “device ID” and “position information” of the onboard device A that is the transmission source of each probe data, and the onboard device A. The “link ID” of the road section where the vehicle is located is recorded in association with each other.
　交通状況データベース３０には、交通状況指標生成部２０が生成した交通状況指標と、交通状況テーブルとが記録されている。 In the traffic situation database 30, the traffic situation index generated by the traffic situation index generation unit 20 and a traffic situation table are recorded.
　信号管制装置５０は、ネットワークＮＷを介して、各道路区間に設けられた複数の信号機Ｓ（Ｓ１～Ｓｎ）のそれぞれの点灯状態を制御する。 The signal control device 50 controls the lighting states of the plurality of traffic lights S (S1 to Sn) provided in each road section via the network NW.
（交通状況指標生成部の機能）
　図３は、本発明の一実施形態に係る交通状況指標生成部の機能構成を示す図である。
　以下、本実施形態の交通状況指標生成部２０の機能について、図３を参照して説明する。
　図３に示すように、交通状況指標生成部２０は、まず、プローブデータ収集部１０からプローブデータを取得する。そして、交通状況指標生成部２０は、既知のビッグデータ分散処理技術、ストリームデータ処理技術等を用いて、複数の車載器Ａ及び携帯端末Ｔから収集したプローブデータに基づく道路区間別の交通状況指標を生成する。交通状況指標生成部２０は、交通状況指標を生成すると、当該交通状況指標を道路区間別に交通状況データベース３０へ記録する。これにより、交通状況指標生成部２０は、現実の道路区間別の状況に応じた交通状況指標をリアルタイムに生成することが可能である。 (Function of traffic condition index generator)
FIG. 3 is a diagram illustrating a functional configuration of the traffic condition index generation unit according to the embodiment of the present invention.
Hereinafter, the function of the traffic condition index generation unit 20 of the present embodiment will be described with reference to FIG.
As shown in FIG. 3, the traffic condition index generation unit 20 first acquires probe data from the probe data collection unit 10. Then, the traffic condition index generation unit 20 uses a known big data distributed processing technique, a stream data processing technique, etc., and the traffic condition index for each road section based on the probe data collected from the plurality of vehicle-mounted devices A and portable terminals T. Is generated. When generating the traffic condition index, the traffic condition index generating unit 20 records the traffic condition index in the traffic condition database 30 for each road section. Thereby, the traffic condition index generation unit 20 can generate a traffic condition index corresponding to the actual situation for each road section in real time.
　また、交通状況指標生成部２０は、交通状況指標を演算する際に用いたプローブデータに基づいて、道路区間（リンクＩＤ）と、当該道路区間に位置する車載器Ａの情報（プローブデータの一部）とが関連付けられた交通状況データを、交通状況データベース３０の交通状況テーブルに追加して更新する。 In addition, the traffic condition index generation unit 20 based on the probe data used when calculating the traffic condition index, information on the road section (link ID) and the vehicle-mounted device A located in the road section (one of the probe data). And the traffic status data associated with the traffic status database 30 is added to the traffic status table of the traffic status database 30 and updated.
（交通状況指標生成部の処理フロー）
　図４は、本発明の一実施形態に係る交通状況指標生成部の処理フローを示す第１の図である。
　以下、本実施形態の交通状況指標生成部２０の処理の流れについて、図４を参照して説明する。 (Processing flow of traffic condition index generation unit)
FIG. 4 is a first diagram illustrating a processing flow of the traffic condition index generation unit according to the embodiment of the present invention.
Hereinafter, the processing flow of the traffic condition index generation unit 20 of the present embodiment will be described with reference to FIG.
　図４に示すように、交通状況指標生成部２０は、プローブデータ収集部１０が収集したプローブデータを取得する（ステップＳ２００）。 As shown in FIG. 4, the traffic condition index generation unit 20 acquires the probe data collected by the probe data collection unit 10 (step S200).
　次に、交通状況指標生成部２０は、プローブデータに基づいて、道路区間別の交通状況指標を生成するとともに、交通状況テーブルを更新する（ステップＳ２０１）。交通状況指標の生成処理及び交通状況テーブルの更新処理の詳細については後述する。 Next, the traffic condition index generation unit 20 generates a traffic condition index for each road section based on the probe data, and updates the traffic condition table (step S201). Details of the traffic condition index generation process and the traffic condition table update process will be described later.
　次に、交通状況指標生成部２０は、交通状況指標を演算する度に、生成した道路区間別の交通状況指標と交通状況テーブルとを交通状況データベース３０へ記録して蓄積する（ステップＳ２０２）。
　このように、交通状況指標生成部２０は、プローブデータを取得する度に、上記処理を繰り返し実行する。 Next, every time the traffic condition index is calculated, the traffic condition index generation unit 20 records and accumulates the generated traffic condition index for each road section and the traffic condition table in the traffic condition database 30 (step S202).
As described above, the traffic condition index generation unit 20 repeatedly executes the above process every time the probe data is acquired.
　図５は、本発明の一実施形態に係る交通状況指標生成部の処理フローを示す第２の図である。
　図６は、本発明の一実施形態に係る交通状況指標生成部の処理フローを示す第３の図である。
　以下、交通状況指標生成部２０が交通状況指標を生成する処理、及び、交通状況テーブルを更新する処理について、図５～図６を参照して説明する。 FIG. 5 is a second diagram illustrating a processing flow of the traffic condition index generation unit according to the embodiment of the present invention.
FIG. 6 is a third diagram illustrating a processing flow of the traffic condition index generation unit according to the embodiment of the present invention.
Hereinafter, the process of generating the traffic condition index and the process of updating the traffic condition table by the traffic condition index generation unit 20 will be described with reference to FIGS.
　交通状況指標生成部２０は、まず、図５に示すように、各プローブデータの送信元である車載器Ａが搭載された車両が位置する道路区間（以下、車両が位置する道路区間）を特定する処理Ｐ２１を行う。
　処理Ｐ２１において、まず、交通状況指標生成部２０は、各プローブデータから「位置情報」を読み出す（ステップＳ２１０）。 First, as shown in FIG. 5, the traffic condition index generation unit 20 identifies a road section where a vehicle equipped with the vehicle-mounted device A that is a transmission source of each probe data is located (hereinafter, a road section where the vehicle is located). Processing P21 to be performed is performed.
In process P21, first, the traffic condition index generation unit 20 reads “position information” from each probe data (step S210).
　次に、交通状況指標生成部２０は、各プローブデータの「位置情報」に基づいて、各車両が位置する道路区間を特定する（ステップＳ２１１）。
　具体的には、交通状況指標生成部２０は、プローブデータの「位置情報」（緯度及び経度）を含む「道路区間位置情報」を有する道路区間を、地図データから検索して特定する。 Next, the traffic condition index generation unit 20 specifies the road section where each vehicle is located based on the “position information” of each probe data (step S211).
Specifically, the traffic condition index generation unit 20 searches and specifies a road section having “road section position information” including “position information” (latitude and longitude) of the probe data from the map data.
　次に、交通状況指標生成部２０は、各プローブデータに、特定した道路区間の「リンクＩＤ」を追加する（ステップＳ２１２）。 Next, the traffic condition index generation unit 20 adds the “link ID” of the identified road section to each probe data (step S212).
　次に、交通状況指標生成部２０は、各プローブデータの「送信日時」、「機器種別」及び「機器ＩＤ」と、ステップＳ２１２において追加された道路区間の「リンクＩＤ」とが関連付けられたデータを、交通状況データベース３０に記録された交通状況テーブルに追加して更新する（ステップＳ２１３）。
　このように、交通状況指標生成部２０は、プローブデータを取得する度に、上記処理Ｐ２１を繰り返し実行する。 Next, the traffic condition index generating unit 20 associates the “transmission date / time”, “device type”, and “device ID” of each probe data with the “link ID” of the road section added in step S212. Is updated by adding to the traffic situation table recorded in the traffic situation database 30 (step S213).
As described above, the traffic condition index generation unit 20 repeatedly executes the process P21 each time the probe data is acquired.
　また、図６に示すように、交通状況指標生成部２０は、上記処理Ｐ２１により「リンクＩＤ」が追加された複数のプローブデータに基づいて、各道路区間の各時刻における交通状況指標を演算する処理Ｐ２２を行う。
　処理Ｐ２２において、まず、交通状況指標生成部２０は、複数のプローブデータのうち、演算の対象となる対象プローブデータを抽出する（ステップＳ２２０）。
　本実施形態では、交通状況指標生成部２０は、各プローブデータの「送信日時」及び「リンクＩＤ」に基づいて、任意の対象時刻において任意の対象道路区間に存在することを示すプローブデータを、演算処理の対象プローブデータとして抽出する。具体的には、交通状況指標生成部２０は、任意の対象時刻から所定時間（例えば１秒間）以内の「送信日時」を有するプローブデータであって、任意の対象道路区間のリンクＩＤと同一の「リンクＩＤ」を有するプローブデータを、演算処理の対象プローブデータとして抽出する。 Moreover, as shown in FIG. 6, the traffic condition index generation unit 20 calculates the traffic condition index at each time of each road section based on the plurality of probe data to which the “link ID” is added by the process P21. Process P22 is performed.
In process P22, first, the traffic condition index generation unit 20 extracts target probe data to be calculated from among a plurality of probe data (step S220).
In the present embodiment, the traffic condition index generation unit 20 generates probe data indicating that it exists in an arbitrary target road section at an arbitrary target time based on the “transmission date and time” and “link ID” of each probe data. Extracted as target probe data for calculation processing. Specifically, the traffic condition index generation unit 20 is probe data having “transmission date and time” within a predetermined time (for example, 1 second) from an arbitrary target time, and is the same as the link ID of an arbitrary target road section. Probe data having “link ID” is extracted as target probe data for the arithmetic processing.
　次に、交通状況指標生成部２０は、対象プローブデータに含まれる各車載器Ａが搭載された車両の「移動速度」（以下、車両の「移動速度」）を取得する（ステップＳ２２１）。具体的には、交通状況指標生成部２０は、プローブデータに含まれる車両の「移動速度」を読み出して取得する。
　なお、本実施形態においては、プローブデータの「移動速度」はメートル毎秒（ｍ／ｓ）で記録されている例について説明するが、他の実施形態においては、キロメートル毎時（ｋｍ／ｈ）等、他の単位で記録されていてもよい。「移動速度」が他の単位で記録されている場合、交通状況指標生成部２０は、「移動速度」をメートル毎秒（ｍ／ｓ）に変換して取得するようにしてもよい。 Next, the traffic condition index generation unit 20 acquires “movement speed” (hereinafter, “movement speed” of the vehicle) of the vehicle on which each vehicle-mounted device A included in the target probe data is mounted (step S221). Specifically, the traffic condition index generation unit 20 reads and acquires the “movement speed” of the vehicle included in the probe data.
In the present embodiment, an example in which the “movement speed” of the probe data is recorded in meters per second (m / s) will be described, but in other embodiments, kilometers per hour (km / h), etc. It may be recorded in other units. When the “movement speed” is recorded in other units, the traffic condition index generation unit 20 may acquire the “movement speed” by converting it into meters per second (m / s).
　次に、交通状況指標生成部２０は、対象プローブデータに含まれる各プローブデータに基づいて、対象道路区間に位置する車載器Ａが搭載された車両の台数を示す「車両台数」を算出する（ステップＳ２２２）。 Next, the traffic condition index generation unit 20 calculates “the number of vehicles” indicating the number of vehicles equipped with the vehicle-mounted device A located in the target road section based on each probe data included in the target probe data ( Step S222).
　次に、交通状況指標生成部２０は、対象道路区間の「リンクＩＤ」を検索キーとして、「対象道路区間の長さ」を地図データから検索して取得する（ステップＳ２２３）。 Next, the traffic condition index generation unit 20 searches and acquires “the length of the target road section” from the map data using the “link ID” of the target road section as a search key (step S223).
　次に、交通状況指標生成部２０は、対象道路区間の対象時刻における交通量を算出する（ステップＳ２２４）。
　具体的には、まず、交通状況指標生成部２０は、ステップＳ２２２で算出した「車両台数」をＮ、ステップＳ２２１で取得した各車両の「移動速度」をｖｉ（ｉ＝１～Ｎ）、ステップＳ２２３で取得した「対象道路区間の長さ」をＫとし、以下の数式（１）を用いて交通量ｑ（台／秒）を求める。 Next, the traffic condition index generation unit 20 calculates the traffic volume at the target time of the target road section (step S224).
Specifically, first, the traffic condition index generation unit 20 sets the “number of vehicles” calculated in step S222 to N, the “movement speed” of each vehicle acquired in step S221 to vi (i = 1 to N), step The “length of the target road section” acquired in S223 is set as K, and the traffic volume q (vehicles / second) is obtained using the following formula (1).
Figure JPOXMLDOC01-appb-M000001
Figure JPOXMLDOC01-appb-M000001
　次に、交通状況指標生成部２０は、対象道路区間の対象時刻における交通密度を算出する（ステップＳ２２５）。
　具体的には、交通状況指標生成部２０は、ステップＳ２２２で算出した「車両台数」をＮ、ステップＳ２２３で取得した「対象道路区間の長さ」をＫとし、以下の数式（２）を用いて交通密度ｋ（台／ｍ）を求める。 Next, the traffic condition index generation unit 20 calculates the traffic density at the target time of the target road section (step S225).
Specifically, the traffic condition index generation unit 20 uses “the number of vehicles” calculated in step S222 as N and “the length of the target road section” acquired in step S223 as K, and uses the following formula (2). To determine the traffic density k (units / m).
Figure JPOXMLDOC01-appb-M000002
Figure JPOXMLDOC01-appb-M000002
　次に、交通状況指標生成部２０は、対象道路区間の対象時刻における平均速度を算出する（ステップＳ２２６）。
　具体的には、交通状況指標生成部２０は、ステップＳ２２２で算出した「車両台数」をＮ、ステップＳ２２１で取得した各車両の「移動速度」をｖｉ（ｉ＝１～Ｎ）とし、以下の数式（３）を用いて平均速度ｖｓ（ｍ／ｓ）を求める。 Next, the traffic condition index generation unit 20 calculates an average speed at the target time of the target road section (step S226).
Specifically, the traffic condition index generation unit 20 sets “the number of vehicles” calculated in step S222 to N, “moving speed” of each vehicle acquired in step S221 to vi (i = 1 to N), and The average speed vs (m / s) is obtained using Equation (3).
Figure JPOXMLDOC01-appb-M000003
Figure JPOXMLDOC01-appb-M000003
　このように、交通状況指標生成部２０は、プローブデータを取得する度に、上記処理Ｐ２２を繰り返し実行することにより、各道路区間の各時刻における交通状況指標を演算する。 Thus, the traffic condition index generation unit 20 calculates the traffic condition index at each time of each road section by repeatedly executing the process P22 each time the probe data is acquired.
（信号管制装置の機能構成）
　図７は、本発明の一実施形態に係る信号管制装置の機能構成を示す図である。
　図７に示すように、信号管制装置５０は、信号切替情報取得部５１０と、交通状況指標取得部５２０と、交通状況変化量情報生成部５３０と、緊急車両情報取得部５４０と、交通状況変化量情報取得部５５０と、信号制御部５６０と、規制情報送信部５７０と、記録媒体５８０と、を備えている。 (Functional configuration of signal control device)
FIG. 7 is a diagram illustrating a functional configuration of the signal control device according to the embodiment of the present invention.
As shown in FIG. 7, the signal control device 50 includes a signal switching information acquisition unit 510, a traffic condition index acquisition unit 520, a traffic condition change amount information generation unit 530, an emergency vehicle information acquisition unit 540, and a traffic condition change. An amount information acquisition unit 550, a signal control unit 560, a restriction information transmission unit 570, and a recording medium 580 are provided.
　信号切替情報取得部５１０は、各信号機Ｓの点灯状態が切り替わる度に、各信号機から何れの点灯状態に切り替わったかを示す信号切替情報をネットワークＮＷを介して取得する。本実施形態において、信号切替情報は、信号機を特定可能な「信号機ＩＤ」と、「点灯状態」等を含む。 The signal switching information acquisition unit 510 acquires signal switching information indicating which lighting state has been switched from each traffic signal via the network NW every time the lighting status of each traffic signal S is switched. In the present embodiment, the signal switching information includes a “traffic signal ID” that can identify a traffic signal, a “lighting state”, and the like.
　交通状況指標取得部５２０は、信号切替情報取得部５１０が信号切替情報を取得すると、当該信号切替情報の送信元である信号機Ｓが設けられた道路区間の交通状況指標を、ネットワークＮＷを介して交通状況データベース３０から取得する。また、交通状況指標取得部５２０は、信号切替情報と交通状況指標とを関連づけた情報を記録媒体５８０に記録して蓄積する。 When the signal switching information acquiring unit 510 acquires the signal switching information, the traffic condition index acquiring unit 520 displays the traffic condition index of the road section where the traffic signal S that is the transmission source of the signal switching information is provided via the network NW. Obtained from the traffic situation database 30. In addition, the traffic condition index acquisition unit 520 records and accumulates information in which the signal switching information and the traffic condition index are associated with each other in the recording medium 580.
　図８は、本発明の一実施形態に係る信号管制装置の機能を説明する第１の図である。
　図９は、本発明の一実施形態に係る交通状況変化量情報の例を示す第１の図である。
　図１０は、本発明の一実施形態に係る信号管制装置の機能を説明する第２の図である。
　図１１は、本発明の一実施形態に係る交通状況変化量情報の例を示す第２の図である。
　図８は日中のある時間帯における信号機Ｓ２０の信号切替情報及び道路区間Ｂ２０ａの交通状況指標の例であり、交通量が多く信号機Ｓ２０の点灯状態に応じて交通状況の変化が大きい例が示されている。図１０は夜間のある時間帯における信号機Ｓ２０の信号切替情報及び道路区間Ｂ２０ａの交通状況指標の例であり、交通量が少なく信号機Ｓ２０の点灯状態に応じて交通状況の変化が小さい例が示されている。
　図８及び図１０の横軸は信号切替情報を取得した時刻を表し、縦軸は交通状況指標（交通量、交通密度及び平均速度）の値を表す。
　図８及び図１０に示すように、道路区間Ｂ２０ａでは、信号機Ｓ２０の点灯状態に応じて、交通状況が変化している。
　交通状況変化量情報生成部５３０は、信号切替情報取得部５１０が信号機Ｓから信号切替情報を取得すると、当該信号切替情報を取得した時点における交通状況指標と、当該信号機Ｓから前回の信号切替情報を取得した時点における交通状況指標とに基づいて、図８及び図１０に示すような信号機Ｓの点灯状態に応じた交通状況の変化を検出し、当該信号機Ｓが設けられた道路区間の交通状況変化量情報Ｄ３０（図９及び図１１）を生成する。
また、交通状況変化量情報生成部５３０は、生成した交通状況変化量情報Ｄ３０を、記録媒体５８０に記録して蓄積する。
　図９は、図８と同時間帯における交通状況変化量情報Ｄ３０の例であり、交通量が多く信号機Ｓ２０の点灯状態に応じて交通状況の変化が大きい例が示されている。図１１は、図１０と同時間帯における交通状況変化量情報Ｄ３０の例であり、交通量が少なく信号機Ｓ２０の点灯状態に応じて交通状況の変化が小さい例が示されている。
　交通状況変化量情報Ｄ３０とは、信号機Ｓの点灯状態に応じて、当該信号機Ｓが設けられている道路区間の交通状況（交通量、交通密度及び平均速度）がどのように変化するかを示す情報である。具体的には、交通状況変化量情報Ｄ３０は、図９及び図１１に示すように、信号機Ｓの点灯状態に応じて、道路区間の交通状況が「改善」するか、「悪化」するか、又は、「変化なし」であるかを示すとともに、「改善」及び「悪化」の度合いが大きい（「大」）か、小さい（「小」）かを示す情報である。
　交通状況が「改善」するとは、例えば、交通量が増加する、交通密度が低下する、平均速度が増加する等の状態を示す。また、交通状況が「悪化」するとは、例えば、交通量が低下する、交通密度が増加する、平均速度が低下する等の状態を示す。また、交通状況変化量情報生成部５３０は、交通量、交通密度及び平均速度の変化量が所定の値以上である場合、「改善」又は「悪化」の度合いが大きいと判断する。所定の値は、交通量、交通密度及び平均速度のそれぞれに異なる値が設定されている。また、所定の値は、道路幅、車線数等の道路区間の特性に応じて、道路区間別に異なる値が設定されていてもよい。 FIG. 8 is a first diagram illustrating the function of the signal control device according to the embodiment of the present invention.
FIG. 9 is a first diagram illustrating an example of traffic state change amount information according to an embodiment of the present invention.
FIG. 10 is a second diagram illustrating the function of the signal control device according to the embodiment of the present invention.
FIG. 11 is a second diagram illustrating an example of traffic state change amount information according to an embodiment of the present invention.
FIG. 8 is an example of the signal switching information of the traffic light S20 and the traffic condition index of the road section B20a in a certain time zone during the day, and shows an example where the traffic volume is large and the traffic condition changes greatly according to the lighting state of the traffic light S20. Has been. FIG. 10 is an example of the signal switching information of the traffic light S20 and the traffic condition index of the road section B20a in a certain time zone at night. An example is shown in which the traffic volume is small and the change of the traffic condition is small according to the lighting state of the traffic light S20. ing.
8 and 10, the horizontal axis represents the time when the signal switching information is acquired, and the vertical axis represents the value of the traffic condition index (traffic volume, traffic density, and average speed).
As shown in FIGS. 8 and 10, in the road section B20a, the traffic situation changes according to the lighting state of the traffic light S20.
When the signal switching information acquisition unit 510 acquires the signal switching information from the traffic light S, the traffic situation change amount information generation unit 530 and the traffic status index at the time when the signal switching information is acquired and the previous signal switching information from the traffic light S are obtained. Based on the traffic condition index at the time when the traffic signal is acquired, a change in traffic condition according to the lighting state of the traffic light S as shown in FIGS. 8 and 10 is detected, and the traffic situation of the road section where the traffic signal S is provided Change amount information D30 (FIGS. 9 and 11) is generated.
The traffic situation change amount information generation unit 530 records and accumulates the generated traffic situation change amount information D30 in the recording medium 580.
FIG. 9 is an example of the traffic situation change amount information D30 in the same time zone as FIG. 8, and shows an example where the traffic situation is large and the traffic situation changes greatly according to the lighting state of the traffic light S20. FIG. 11 shows an example of the traffic condition change amount information D30 in the same time zone as FIG. 10, and shows an example in which the traffic condition is small and the change of the traffic condition is small according to the lighting state of the traffic light S20.
The traffic situation change amount information D30 indicates how the traffic situation (traffic volume, traffic density, and average speed) of the road section where the traffic signal S is provided changes according to the lighting state of the traffic light S. Information. Specifically, as shown in FIGS. 9 and 11, the traffic situation change amount information D30 indicates whether the traffic situation of the road section “improves” or “deteriorates” according to the lighting state of the traffic light S. Alternatively, it is information indicating whether “no change” and whether the degree of “improvement” and “deterioration” is large (“large”) or small (“small”).
The “improvement” of the traffic condition indicates a state where the traffic volume increases, the traffic density decreases, the average speed increases, or the like. Further, the “deterioration” of the traffic situation indicates a state in which, for example, the traffic volume decreases, the traffic density increases, the average speed decreases, and the like. The traffic state change amount information generation unit 530 determines that the degree of “improvement” or “deterioration” is large when the change amount of the traffic amount, the traffic density, and the average speed is equal to or greater than a predetermined value. As the predetermined value, different values are set for the traffic volume, the traffic density, and the average speed. In addition, the predetermined value may be set to a different value for each road section according to the characteristics of the road section such as the road width and the number of lanes.
　緊急車両情報取得部５４０は、緊急車両が緊急の用務のために走行する際に、当該緊急車両に搭載された車載器Ａ１から緊急車両情報をネットワークＮＷを介して取得する。
　緊急車両情報には、「送信日時」、「機器ＩＤ」、「位置情報」、「移動速度」、「目的地」、「走行予定経路」等が含まれている。
　「送信日時」は、緊急車両情報が車載器Ａ１から送信された日時を示す情報である。「機器ＩＤ」は、緊急車両情報の送信元である車載器Ａ１を特定可能な情報であり、プローブデータに含まれる「機器ＩＤ」と同一である。「位置情報」は、緊急車両情報が送信された日時における、車載器Ａ１が搭載された緊急車両が位置する地点（緯度、経度等）を示す情報である。「移動速度」は、緊急車両情報が送信された日時における、車載器Ａ１が搭載された緊急車両の走行速度（ｍ／ｓ）を示す情報である。「目的地」は、緊急車両が到達する地点（緯度、経度等）を示す情報である。「走行予定経路」は、緊急車両の位置する地点から目的地までの経路に含まれる一つ以上の道路区間（リンクＩＤ）を、緊急車両が走行する順に列挙した情報である。
　なお、緊急車両情報取得部５４０は、車載器Ａ１から送信されるプローブデータを、緊急車両情報として取得してもよい。この場合、車載器Ａ１から送信されるプローブデータには、上記した緊急車両情報の各情報が含まれている。 When the emergency vehicle travels for an emergency service, the emergency vehicle information acquisition unit 540 acquires emergency vehicle information from the vehicle-mounted device A1 mounted on the emergency vehicle via the network NW.
The emergency vehicle information includes “transmission date and time”, “device ID”, “position information”, “movement speed”, “destination”, “scheduled travel route”, and the like.
“Transmission date and time” is information indicating the date and time when the emergency vehicle information is transmitted from the vehicle-mounted device A1. The “device ID” is information that can identify the vehicle-mounted device A1 that is the transmission source of the emergency vehicle information, and is the same as the “device ID” included in the probe data. “Position information” is information indicating a point (latitude, longitude, etc.) where the emergency vehicle equipped with the vehicle-mounted device A1 is located at the date and time when the emergency vehicle information was transmitted. “Movement speed” is information indicating the traveling speed (m / s) of the emergency vehicle on which the vehicle-mounted device A1 is mounted at the date and time when the emergency vehicle information is transmitted. “Destination” is information indicating a point (latitude, longitude, etc.) to which the emergency vehicle arrives. The “scheduled travel route” is information in which one or more road sections (link IDs) included in the route from the point where the emergency vehicle is located to the destination are listed in the order in which the emergency vehicle travels.
In addition, the emergency vehicle information acquisition part 540 may acquire the probe data transmitted from onboard equipment A1 as emergency vehicle information. In this case, each piece of information on the emergency vehicle information described above is included in the probe data transmitted from the vehicle-mounted device A1.
　交通状況変化量情報取得部５５０は、記録媒体５８０に蓄積されている交通状況変化量情報Ｄ３０を取得する。
　本実施形態では、交通状況変化量情報取得部５５０は、緊急車両情報取得部５４０が緊急車両情報を取得すると、当該緊急車両情報の「走行予定経路」に含まれる各道路区間に関連付られた交通状況変化量情報Ｄ３０を、記録媒体５８０から取得する。 The traffic state change amount information acquisition unit 550 acquires the traffic state change amount information D30 stored in the recording medium 580.
In the present embodiment, when the emergency vehicle information acquisition unit 540 acquires emergency vehicle information, the traffic state change amount information acquisition unit 550 is associated with each road section included in the “scheduled travel route” of the emergency vehicle information. Traffic situation change amount information D30 is acquired from recording medium 580.
　信号制御部５６０は、緊急車両情報と、交通状況変化量情報取得部５５０が取得した交通状況変化量情報Ｄ３０に基づいて、「走行予定経路」に含まれる各道路区間に設けられた信号機Ｓの制御を行う。
　具体的には、信号制御部５６０は、緊急車両情報と交通状況変化量情報Ｄ３０とに基づいて、各信号機Ｓを制御した場合、各信号機Ｓが設けられている道路区間の交通状況を改善する効果が大きいか否かを判断する。そして、信号制御部５６０は、信号機Ｓをある点灯状態（例えば「青信号」の状態）となるように制御した場合、当該信号機Ｓが設けられている道路区間の「交通状況を改善する効果が大きい」と判断すると、当該信号機Ｓを制御対象として選択する。そして、信号制御部５６０は、制御対象である信号機Ｓの点灯状態を切り替える（「青信号」に切り替える）指令、又は、信号機Ｓの現在の点灯状態を延長する（「青信号」の状態を延長する）指令を含む信号制御情報を信号機Ｓへ送信することにより、信号機Ｓの制御を行う。
　一方、信号制御部５６０は、信号機Ｓの点灯状態を制御しても、当該信号機Ｓが設けられている道路区間の「交通状況を改善する効果が小さい」と判断すると、当該信号機Ｓの制御を行わない。なお、本実施形態において、「交通状況を改善する効果が小さい」とは、「交通状況は改善するが効果が小さい」、「交通状況が変化しない」、「交通状況が悪化する」等の状態を含む。 Based on the emergency vehicle information and the traffic condition change amount information D30 acquired by the traffic condition change amount information acquisition unit 550, the signal control unit 560 determines the traffic signal S provided in each road section included in the “scheduled travel route”. Take control.
Specifically, when each traffic light S is controlled based on the emergency vehicle information and traffic situation change amount information D30, the signal control unit 560 improves the traffic situation of the road section where each traffic light S is provided. Determine if the effect is significant. Then, when the signal control unit 560 controls the traffic light S to be in a certain lighting state (for example, “green light” state), the effect of improving the traffic condition of the road section where the traffic light S is provided is great. If it is determined, the traffic light S is selected as a control target. Then, the signal control unit 560 instructs to switch the lighting state of the traffic light S to be controlled (switch to “green light”) or extends the current lighting state of the traffic light S (extends the state of “blue light”). By transmitting signal control information including a command to the traffic light S, the traffic light S is controlled.
On the other hand, if the signal control unit 560 determines that “the effect of improving the traffic situation is small” in the road section where the traffic light S is provided even if the lighting state of the traffic light S is controlled, the signal control unit 560 controls the traffic light S. Not performed. In this embodiment, “the effect of improving the traffic situation is small” means “the traffic situation is improved but the effect is small”, “the traffic situation does not change”, “the traffic situation is deteriorated”, etc. including.
　規制情報送信部５７０は、信号制御部５６０が信号機Ｓを制御することにより、通行が禁止される等の交通規制が行われる規制対象道路区間の規制情報を、当該規制対象道路区間に位置する車両に搭載された車載器Ａ及び規制情報通知部Ｇ（後述）の少なくとも一方へ送信する。このとき、規制情報送信部５７０は、交通状況データベース３０に記録された交通状況テーブルを検索して、規制対象道路区間の「リンクＩＤ」と同一の「リンクＩＤ」を有する道路区間に位置する車両に搭載された車載器Ａを抽出する。 The restriction information transmission unit 570 is a vehicle in which restriction information of a restriction target road section in which traffic restriction such as passage is prohibited is performed by the signal control unit 560 controlling the traffic light S, in the restriction target road section. Is transmitted to at least one of the vehicle-mounted device A and the regulation information notification unit G (described later). At this time, the regulation information transmission unit 570 searches the traffic situation table recorded in the traffic situation database 30, and the vehicle located in the road section having the same “link ID” as the “link ID” of the regulation target road section. The vehicle-mounted device A mounted on is extracted.
　規制情報には、信号制御部５６０が信号機Ｓを制御することにより、通行が禁止される（「赤信号」に切り替えられる）等の交通規制が行われる道路区間を特定可能な情報（「リンクＩＤ」）、交通規制の期間（開始時刻及び終了時刻）の情報等が含まれている。また、緊急車両情報の「位置情報」、「移動速度」及び「走行予定経路」に基づいて緊急車両が各道路区間を走行する時刻を推測し、当該道路区間に位置する一般車両に対して、緊急車両が走行することを予告する情報が含まれていてもよい。規制情報送信部５７０は、このような規制情報を送信することにより、一般車両の運転者に、規制対象道路区間及び緊急車両が走行する道路区間に関する情報を認識させることができる。
　更に、規制情報には、緊急車両の「走行予定経路」上の各信号機Ｓの点灯状態、道路区間の交通状況等が含まれていてもよい。規制情報送信部５７０は、このような規制情報を送信することにより、緊急車両の運転者に、「走行予定経路」上の各信号機Ｓの点灯状態、各道路区間の交通状況を認識させることができる。
　規制対象道路区間は、緊急車両情報の「走行予定経路」に含まれる道路区間、緊急車両の「走行予定経路」に含まれる道路区間に接続する道路区間等、交通規制の影響が生じる道路区間を示す。
　規制情報通知部Ｇは、例えば、道路上に設けられた渋滞、通行止め等の交通情報を表示するための道路情報板、電波等を介して車載器Ａに交通情報を配信するための通信装置等である。
　なお、規制情報送信部５７０は、緊急車両情報の「位置情報」及び「移動速度」に基づいて各道路区間に到達する時刻を推測し、緊急車両が基準位置に到達すると推測された時刻よりも所定時間前（例えば１０秒前）のタイミングで規制情報を送信するようにしてもよい。また、緊急車両情報の「位置情報」に基づき、緊急車両が基準位置よりも所定距離手前（例えば１００メートル手前）の位置に到達したタイミングで規制情報を送信するようにしてもよい。この場合、基準位置とは、制御対象の信号機Ｓが設けられている位置、制御対象の信号機Ｓが設けられている道路区間の始点又は終点の位置等である。 In the restriction information, the signal control unit 560 controls the traffic light S to be able to specify a road section where traffic restriction such as traffic is prohibited (switched to “red light”) (“link ID”). "), Information on the traffic regulation period (start time and end time), and the like. Also, based on the “location information”, “movement speed”, and “planned travel route” of the emergency vehicle information, the time when the emergency vehicle travels in each road section is estimated, and for a general vehicle located in the road section, Information for notifying that the emergency vehicle is traveling may be included. By transmitting such restriction information, the restriction information transmission unit 570 can allow the driver of the general vehicle to recognize information related to the restriction target road section and the road section on which the emergency vehicle travels.
Furthermore, the regulation information may include the lighting state of each traffic light S on the “scheduled travel route” of the emergency vehicle, the traffic situation of the road section, and the like. By transmitting such restriction information, the restriction information transmission unit 570 can allow the driver of the emergency vehicle to recognize the lighting state of each traffic light S on the “scheduled travel route” and the traffic situation of each road section. it can.
Restricted road sections include road sections that are affected by traffic restrictions, such as road sections included in the “scheduled travel route” of emergency vehicle information, road sections connected to road sections included in the “scheduled travel route” of emergency vehicles, etc. Show.
The regulation information notification unit G is, for example, a road information board for displaying traffic information such as traffic jams and road closures provided on the road, a communication device for distributing traffic information to the vehicle-mounted device A via radio waves, etc. It is.
The restriction information transmission unit 570 estimates the time to reach each road section based on the “position information” and “movement speed” of the emergency vehicle information, and is more than the time at which the emergency vehicle is estimated to reach the reference position. The restriction information may be transmitted at a timing before a predetermined time (for example, 10 seconds before). Further, based on the “position information” of the emergency vehicle information, the restriction information may be transmitted at a timing when the emergency vehicle reaches a position a predetermined distance before the reference position (for example, 100 meters before). In this case, the reference position is a position where the signal S to be controlled is provided, a position of a start point or an end point of a road section where the signal S to be controlled is provided, and the like.
　記録媒体５８０には、交通状況指標取得部５２０が記録した信号切替情報及び交通状況指標を関連付けた情報と、交通状況変化量情報生成部５３０が生成した交通状況変化量情報Ｄ３０とが記録されている。また、記録媒体５８０には、各信号機Ｓが設けられている道路区間と、各規制情報通知部Ｇが設けられている道路区間とがそれぞれ関連付られた地図データが予め記録されている。 In the recording medium 580, information relating the signal switching information and the traffic condition index recorded by the traffic condition index acquisition unit 520 and the traffic condition change amount information D30 generated by the traffic condition change amount information generation unit 530 are recorded. Yes. In addition, map data in which a road section where each traffic signal S is provided and a road section where each regulation information notification unit G is associated is recorded in the recording medium 580 in advance.
（信号管制装置の処理フロー）
　図１２は、本発明の一実施形態に係る信号管制装置の処理フローを示す第１の図である。
　図１３は、本発明の一実施形態に係る信号管制装置の処理フローを示す第２の図である。
　以下、本実施形態の信号管制装置５０の処理の流れについて、図１２～図１３を参照して説明する。 (Processing flow of signal control device)
FIG. 12 is a first diagram illustrating a processing flow of the signal control device according to the embodiment of the present invention.
FIG. 13 is a second diagram showing a processing flow of the signal control device according to the embodiment of the present invention.
Hereinafter, the flow of processing of the signal control device 50 of the present embodiment will be described with reference to FIGS.
　まず、信号管制装置５０は、図１２に示すように、道路区間別の交通状況変化量情報Ｄ３０を生成する処理Ｐ５０を行う。
　処理Ｐ５０において、信号切替情報取得部５１０は、各信号機Ｓから信号切替情報を取得する（ステップＳ５００）。 First, as shown in FIG. 12, the signal control device 50 performs a process P50 for generating traffic condition change amount information D30 for each road section.
In process P50, the signal switching information acquisition unit 510 acquires signal switching information from each traffic light S (step S500).
　次に、交通状況指標取得部５２０は、信号切替情報取得部５１０が信号切替情報を取得すると、当該信号切替情報の送信元である信号機Ｓが設けられた道路区間の交通状況指標を、交通状況データベース３０から取得する（ステップＳ５０１）。
　また、交通状況指標取得部５２０は、信号切替情報と交通状況指標とを関連づけた情報を記録媒体５８０に記録して蓄積する。 Next, when the signal switching information acquiring unit 510 acquires the signal switching information, the traffic condition index acquiring unit 520 displays the traffic condition index of the road section in which the traffic light S, which is the transmission source of the signal switching information, is provided. Obtained from the database 30 (step S501).
In addition, the traffic condition index acquisition unit 520 records and accumulates information in which the signal switching information and the traffic condition index are associated with each other in the recording medium 580.
　次に、交通状況変化量情報生成部５３０は、信号切替情報取得部５１０が信号機Ｓから信号切替情報を取得すると、当該信号切替情報を取得した時点における交通状況指標と、当該信号機Ｓから前回の信号切替情報を取得した時点における交通状況指標とに基づいて、当該信号機Ｓが設けられた道路区間の交通状況変化量情報Ｄ３０を生成する（ステップＳ５０２）。また、交通状況変化量情報生成部５３０は、生成した交通状況変化量情報Ｄ３０を、記録媒体５８０に記録して蓄積する。 Next, when the signal switching information acquisition unit 510 acquires the signal switching information from the traffic light S, the traffic status change amount information generation unit 530 obtains the traffic status index at the time of acquiring the signal switching information and the traffic signal S from the previous time. Based on the traffic condition index at the time when the signal switching information is acquired, the traffic condition change amount information D30 of the road section where the signal S is provided is generated (step S502). The traffic situation change amount information generation unit 530 records and accumulates the generated traffic situation change amount information D30 in the recording medium 580.
　ここで、ステップＳ５０２における交通状況変化量情報生成部５３０の具体的な処理の内容を、図８～図１１を参照して説明する。
　交通状況変化量情報生成部５３０は、例えば、信号機Ｓ２０から信号切替情報を取得した時点における道路区間Ｂ２０ａの交通状況指標と、信号機Ｓ２０から前回の信号切替情報を取得した時点における交通状況指標とに基づいて、信号機Ｓ２０の点灯状態に応じた道路区間Ｂ２０ａの交通状況変化量情報Ｄ３０を生成する。
　例えば、図８に示すように、交通状況変化量情報生成部５３０は、時刻「ｔ２」において、信号機Ｓ２０から点灯状態が「青信号」に切り替わったことを示す信号切替信号を取得した場合、時刻「ｔ２」における交通状況指標と、前回の信号切替信号を取得した時刻「ｔ１」における交通状況指標とに基づいて、時刻「ｔ１」から「ｔ２」の期間の交通状況変化量情報Ｄ３０を生成する。図８の例では、前回の信号切替信号に含まれる信号機Ｓ２０の点灯状態は「赤信号」であるため、交通状況変化量情報生成部５３０は、信号機Ｓ２０の点灯状態が「赤信号」であるときの交通状況変化量情報Ｄ３０を生成する。図８の例では、時刻「ｔ１」から「ｔ２」の期間において、交通量が所定の値以上低下し、交通密度が所定の値以上増加し、平均速度が所定の値以上低下している。このため、交通状況変化量情報生成部５３０は、時刻「ｔ１」から「ｔ２」の期間、即ち、信号機Ｓ２０の点灯状態が「赤信号」であるときの道路区間Ｂ２０ａの交通状況は「悪化の度合いが大きい」と判断する。このため、交通状況変化量情報生成部５３０は、図９に示すように、信号機Ｓ２０の点灯状態が「赤信号」であるときの道路区間Ｂ２０ａの交通状況は「悪化の度合いが大きい」ことを示す交通状況変化量情報Ｄ３０を生成する。
　一方、交通状況変化量情報生成部５３０は、時刻「ｔ３」において、信号機Ｓ２０から点灯状態が「黄信号」に切り替わったことを示す信号切替信号を取得した場合、時刻「ｔ３」における交通状況指標と、前回の信号切替信号を取得した時刻「ｔ２」における交通状況指標とに基づいて、時刻「ｔ２」から「ｔ３」の期間、即ち、信号機Ｓ２０の点灯状態が「青信号」であるときの交通状況変化量情報Ｄ３０を生成する。図８の例では、時刻「ｔ２」から「ｔ３」の期間において、交通量が所定の値以上増加し、交通密度が所定の値以上低下し、平均速度が所定の値以上増加している。このため、交通状況変化量情報生成部５３０は、時刻「ｔ２」から「ｔ３」の期間、即ち、信号機Ｓ２０の点灯状態が「青信号」であるときの道路区間Ｂ２０ａの交通状況は「改善の度合いが大きい」と判断する。このため、交通状況変化量情報生成部５３０は、図９に示すように、信号機Ｓ２０の点灯状態が「青信号」であるときの道路区間Ｂ２０ａの交通状況は「改善の度合いが大きい」ことを示す交通状況変化量情報Ｄ３０を生成する。 Here, the specific processing contents of the traffic state change amount information generation unit 530 in step S502 will be described with reference to FIGS.
For example, the traffic state change amount information generation unit 530 uses the traffic condition index of the road section B20a when the signal switching information is acquired from the traffic light S20 and the traffic condition index when the previous signal switching information is acquired from the traffic light S20. Based on the traffic light change information D30 of the road section B20a according to the lighting state of the traffic light S20.
For example, as illustrated in FIG. 8, when the traffic state change amount information generation unit 530 acquires a signal switching signal indicating that the lighting state has been switched to “green light” from the traffic light S20 at time “t2,” the time “ Based on the traffic condition index at time “t2” and the traffic condition index at time “t1” at which the previous signal switching signal was acquired, the traffic condition change amount information D30 from the time “t1” to “t2” is generated. In the example of FIG. 8, since the lighting state of the traffic light S20 included in the previous signal switching signal is “red signal”, the traffic state change amount information generation unit 530 indicates that the lighting state of the traffic light S20 is “red signal”. The traffic condition change amount information D30 is generated. In the example of FIG. 8, during the period from time “t1” to “t2”, the traffic volume decreases by a predetermined value or more, the traffic density increases by a predetermined value or more, and the average speed decreases by a predetermined value or more. For this reason, the traffic situation change amount information generation unit 530 determines that the traffic situation of the road section B20a during the period from time “t1” to “t2”, that is, when the lighting state of the traffic light S20 is “red light” is “deteriorating”. It is judged that the degree is large. For this reason, as shown in FIG. 9, the traffic condition change amount information generation unit 530 indicates that the traffic condition of the road section B20a when the lighting state of the traffic light S20 is “red light” is “the degree of deterioration is large”. The traffic state change amount information D30 shown is generated.
On the other hand, when the traffic state change amount information generation unit 530 acquires a signal switching signal indicating that the lighting state is switched to the “yellow signal” from the traffic light S20 at the time “t3”, the traffic state index at the time “t3”. And the traffic from the time “t2” to the time “t3”, that is, traffic when the lighting state of the traffic light S20 is “green light” based on the traffic condition index at the time “t2” at which the previous signal switching signal was acquired. The situation change amount information D30 is generated. In the example of FIG. 8, during the period from time “t2” to “t3”, the traffic volume increases by a predetermined value or more, the traffic density decreases by a predetermined value or more, and the average speed increases by a predetermined value or more. For this reason, the traffic state change amount information generation unit 530 determines that the traffic state of the road section B20a during the period from the time “t2” to “t3”, that is, when the traffic light S20 is in the “green light” is “degree of improvement”. Is large. " Therefore, as shown in FIG. 9, the traffic condition change amount information generation unit 530 indicates that the traffic condition of the road section B20a when the lighting state of the traffic light S20 is “green light” indicates “the degree of improvement is large”. Traffic situation change amount information D30 is generated.
　また、図１０に示すように、交通状況変化量情報生成部５３０は、時刻「ｔ２」において、信号機Ｓ２０から点灯状態が「青信号」に切り替わったことを示す信号切替信号を取得した場合、時刻「ｔ２」における交通状況指標と、前回の信号切替信号を取得した時刻「ｔ１」における交通状況指標とに基づいて、時刻「ｔ１」から「ｔ２」の期間、即ち、信号機Ｓ２０の点灯状態が「赤信号」であるときの交通状況変化量情報Ｄ３０を生成する。図１０の例では、時刻「ｔ１」から「ｔ２」の期間において、交通量が低下し、交通密度が増加し、平均速度が低下しているが、それぞれ所定の値未満の変化量である。このため、交通状況変化量情報生成部５３０は、時刻「ｔ１」から「ｔ２」の期間、即ち、信号機Ｓ２０の点灯状態が「赤信号」であるときの道路区間Ｂ２０ａの交通状況は「悪化の度合いが小さい」と判断する。このため、交通状況変化量情報生成部５３０は、図１１に示すように、信号機Ｓ２０の点灯状態が「赤信号」であるときの道路区間Ｂ２０ａの交通状況は「悪化の度合いが小さい」ことを示す交通状況変化量情報Ｄ３０を生成する。
　一方、交通状況変化量情報生成部５３０は、時刻「ｔ３」において、信号機Ｓ２０から点灯状態が「黄信号」に切り替わったことを示す信号切替信号を取得した場合、時刻「ｔ３」における交通状況指標と、前回の信号切替信号を取得した時刻「ｔ２」における交通状況指標とに基づいて、時刻「ｔ２」から「ｔ３」の期間、即ち、信号機Ｓ２０の点灯状態が「青信号」であるときの交通状況変化量情報Ｄ３０を生成する。図１０の例では、時刻「ｔ２」から「ｔ３」の期間において、交通量が増加し、交通密度が低下し、平均速度が増加しているが、それぞれ所定の値未満の変化量である。このため、交通状況変化量情報生成部５３０は、時刻「ｔ２」から「ｔ３」の期間、即ち、信号機Ｓ２０の点灯状態が「青信号」であるときの道路区間Ｂ２０ａの交通状況は「改善の度合いが小さい」と判断する。このため、交通状況変化量情報生成部５３０は、図１１に示すように、信号機Ｓ２０の点灯状態が「青信号」であるときの道路区間Ｂ２０ａの交通状況は「改善の度合いが小さい」ことを示す交通状況変化量情報Ｄ３０を生成する。
　なお、交通状況変化量情報生成部５３０は、交通状況指標に変化がない場合は、図１１に示すように「変化なし」を示す交通状況変化量情報Ｄ３０を生成する。なお、交通状況変化量情報生成部５３０は、交通状況指標の変化量が所定の範囲内である場合、「変化なし」であると判断する。
　信号管制装置５０は、各信号機Ｓから信号切替情報を取得する度に、上記処理Ｐ５０を繰り返し実行し、記録媒体５８０に交通状況変化量情報Ｄ３０を蓄積する。 In addition, as illustrated in FIG. 10, when the traffic state change amount information generation unit 530 acquires a signal switching signal indicating that the lighting state has been switched to “green light” from the traffic light S20 at time “t2,” the time “ Based on the traffic condition index at “t2” and the traffic condition index at the time “t1” when the previous signal switching signal was acquired, the lighting state of the traffic light S20 is “red” during the period from the time “t1” to “t2”. Traffic condition change amount information D30 when it is “signal” is generated. In the example of FIG. 10, during the period from time “t1” to “t2”, the traffic volume is decreased, the traffic density is increased, and the average speed is decreased, but each is a change amount less than a predetermined value. For this reason, the traffic situation change amount information generation unit 530 determines that the traffic situation of the road section B20a during the period from time “t1” to “t2”, that is, when the lighting state of the traffic light S20 is “red light” is “deteriorating”. “Degree is small”. For this reason, as shown in FIG. 11, the traffic condition change amount information generation unit 530 indicates that the traffic condition of the road section B20a when the lighting state of the traffic light S20 is “red light” is “the degree of deterioration is small”. The traffic state change amount information D30 shown is generated.
On the other hand, when the traffic state change amount information generation unit 530 acquires a signal switching signal indicating that the lighting state is switched to the “yellow signal” from the traffic light S20 at the time “t3”, the traffic state index at the time “t3”. And the traffic from the time “t2” to the time “t3”, that is, traffic when the lighting state of the traffic light S20 is “green light” based on the traffic condition index at the time “t2” at which the previous signal switching signal was acquired. The situation change amount information D30 is generated. In the example of FIG. 10, during the period from time “t2” to “t3”, the traffic volume increases, the traffic density decreases, and the average speed increases, but each is a change amount less than a predetermined value. For this reason, the traffic state change amount information generation unit 530 determines that the traffic state of the road section B20a during the period from the time “t2” to “t3”, that is, when the traffic light S20 is in the “green light” is “degree of improvement”. Is small. " Therefore, as shown in FIG. 11, the traffic condition change amount information generation unit 530 indicates that the traffic condition of the road section B20a when the lighting state of the traffic light S20 is “green light” indicates “the degree of improvement is small”. Traffic situation change amount information D30 is generated.
When there is no change in the traffic condition index, the traffic condition change amount information generation unit 530 generates traffic condition change amount information D30 indicating “no change” as shown in FIG. In addition, the traffic situation change amount information generation unit 530 determines that “no change” when the change amount of the traffic situation index is within a predetermined range.
Each time the signal control device 50 acquires signal switching information from each traffic light S, the signal control device 50 repeatedly executes the process P50 and accumulates the traffic condition change amount information D30 in the recording medium 580.
　また、信号管制装置５０は、図１３に示すように、信号機Ｓを制御する処理Ｐ５１を行う。
　処理Ｐ５１において、緊急車両情報取得部５４０は、緊急車両が緊急の用務のために走行する際に、当該緊急車両に搭載された車載器Ａ１から緊急車両情報を取得する（ステップＳ５１０）。本実施形態では、緊急車両情報取得部５４０は、緊急車両が緊急の用務のために走行を開始してから当該用務が完了する（目的地に到達する）までの期間において、所定の間隔毎（例えば５秒毎）に緊急車両情報を取得する。 Further, the signal control device 50 performs a process P51 for controlling the traffic light S as shown in FIG.
In process P51, the emergency vehicle information acquisition unit 540 acquires emergency vehicle information from the vehicle-mounted device A1 mounted on the emergency vehicle when the emergency vehicle travels for an emergency service (step S510). In the present embodiment, the emergency vehicle information acquisition unit 540 is configured at predetermined intervals (in a period from when the emergency vehicle starts traveling for an emergency service until the service is completed (arrives at the destination)). For example, emergency vehicle information is acquired every 5 seconds.
　次に、交通状況変化量情報取得部５５０は、記録媒体５８０に蓄積されている交通状況変化量情報Ｄ３０を取得する（ステップＳ５１１）。
　具体的には、交通状況変化量情報取得部５５０は、ステップＳ５１０において緊急車両情報取得部５４０が緊急車両情報を取得すると、当該緊急車両情報の「走行予定経路」に含まれる各道路区間に関連付られた交通状況変化量情報Ｄ３０を、記録媒体５８０から取得する。 Next, the traffic state change amount information acquisition unit 550 acquires the traffic state change amount information D30 stored in the recording medium 580 (step S511).
Specifically, when the emergency vehicle information acquisition unit 540 acquires emergency vehicle information in step S510, the traffic state change amount information acquisition unit 550 relates to each road section included in the “scheduled travel route” of the emergency vehicle information. The attached traffic condition change amount information D30 is acquired from the recording medium 580.
　次に、信号制御部５６０は、緊急車両情報と交通状況変化量情報Ｄ３０とに基づいて、道路区間の交通状況を改善する効果が大きい信号機Ｓを、制御対象の信号機として選択する（ステップＳ５１２）。
　具体的には、信号制御部５６０は、緊急車両情報の「位置情報」と、記録媒体５８０に予め記録されている地図データとに基づいて、「走行予定経路」に含まれる各道路区間に設けられた信号機Ｓのうち、緊急車両が未到達である信号機Ｓを抽出する。
　例えば、信号制御部５６０は、緊急車両が未到達である信号機Ｓの一つとして、道路区間Ｂ２０ａに設けられた信号機Ｓ２０（図２）を抽出したとする。信号制御部５６０は、道路区間Ｂ２０ａの交通状況変化量情報Ｄ３０に基づいて、当該信号機Ｓ２０を、道路区間Ｂ２０ａの交通状況を改善する効果が大きい点灯状態となるように制御することにより、道路区間Ｂ２０ａの交通状況を改善する効果が大きいか否かを判断する。
　図９の例では、交通状況変化量情報Ｄ３０によれば、信号機Ｓ２０の点灯状態が「青信号」である場合、道路区間Ｂ２０ａの交通状況が大きく改善する（「改善（大）」）ことが予想される。このため、信号制御部５６０は、信号機Ｓ２０の点灯状態を「青信号」にすることにより、道路区間Ｂ２０ａの交通状況を改善する効果が大きいと判断する。この場合、信号制御部５６０は、信号機Ｓ２０を制御対象の信号機として選択する。
　一方、図１１の例では、交通状況変化量情報Ｄ３０によれば、信号機Ｓ２０の点灯状態が「青信号」である場合、道路区間Ｂ２０ａの交通状況は改善するものの、改善の度合いは小さい（「改善（小）」）ことが予想される。このため、信号制御部５６０は、信号機Ｓ２０の点灯状態を「青信号」にした場合であっても、道路区間Ｂ２０ａの交通状況を改善する効果が小さいと判断する。この場合、信号制御部５６０は、信号機Ｓ２０の制御は不要であると判断し、当該信号機Ｓを制御対象の信号機として選択しない。
　信号制御部５６０は、緊急車両が未到達の全ての信号機Ｓに対し、このような判断を行い、制御対象の信号機Ｓを選択する。 Next, the signal control unit 560 selects a traffic light S that has a large effect of improving the traffic situation of the road section as a traffic signal to be controlled based on the emergency vehicle information and the traffic situation change amount information D30 (step S512). .
Specifically, the signal control unit 560 is provided in each road section included in the “scheduled travel route” based on “location information” of emergency vehicle information and map data recorded in advance on the recording medium 580. Among the received traffic lights S, the traffic lights S to which the emergency vehicle has not reached are extracted.
For example, it is assumed that the signal control unit 560 extracts the traffic light S20 (FIG. 2) provided in the road section B20a as one of the traffic lights S that the emergency vehicle has not reached. Based on the traffic condition change amount information D30 of the road section B20a, the signal control unit 560 controls the traffic light S20 so as to be in a lighting state with a large effect of improving the traffic condition of the road section B20a. It is determined whether the effect of improving the traffic situation of B20a is large.
In the example of FIG. 9, according to the traffic condition change amount information D30, when the lighting state of the traffic light S20 is “green light”, the traffic condition of the road section B20a is expected to be greatly improved (“improvement (large)”). Is done. For this reason, the signal control unit 560 determines that the effect of improving the traffic condition of the road section B20a is large by setting the lighting state of the traffic light S20 to “green light”. In this case, the signal control unit 560 selects the traffic light S20 as a traffic signal to be controlled.
On the other hand, in the example of FIG. 11, according to the traffic condition change amount information D30, when the lighting state of the traffic light S20 is “green light”, the traffic condition of the road section B20a is improved, but the improvement degree is small (“improvement” (Small) ") is expected. For this reason, the signal control unit 560 determines that the effect of improving the traffic condition of the road section B20a is small even when the lighting state of the traffic light S20 is set to “green light”. In this case, the signal control unit 560 determines that the control of the traffic light S20 is unnecessary, and does not select the traffic light S as a control target traffic light.
The signal control unit 560 makes such a determination for all the traffic lights S that have not yet reached the emergency vehicle, and selects the traffic lights S to be controlled.
　次に、信号制御部５６０は、ステップＳ５１２で選択された制御対象の信号機Ｓの制御を行う（ステップＳ５１３）。
　図９の例では、交通状況変化量情報Ｄ３０によれば、信号機Ｓ２０がの点灯状態が「青信号」である場合、道路区間Ｂ２０ａの交通状況が大きく改善する（「改善（大）」）ことが予想される。このため、信号制御部５６０は、信号機Ｓ２０の点灯状態が「青信号」となるように、当該信号機Ｓ２０を制御する。具体的には、信号制御部５６０は、信号切替情報取得部５１０が取得した信号機Ｓ２０の最新の信号切替情報が、信号機Ｓ２０の点灯状態が「青信号」以外であることを示す場合、当該信号機Ｓ２０へ「青信号」に切り替える指令を含む信号制御情報を送信する。
　一方、信号制御部５６０は、信号切替情報取得部５１０が取得した信号機Ｓ２０の最新の信号切替情報が、信号機Ｓ２０の点灯状態が「青信号」であることを示す場合、当該信号機Ｓ２０に対して所定の延長時間（例えば１０秒間）、「青信号」の点灯状態を延長する指令を含む信号制御情報を送信する。
　なお、信号制御部５６０は、緊急車両情報に含まれる「位置情報」及び「移動速度」に基づいて緊急車両が信号機Ｓ２０を通過する時刻を推測してもよい。そして、信号制御部５６０は、緊急車両が信号機Ｓ２０を通過すると予測される時刻まで「青信号」の点灯状態を継続するように、延長時間を設定してもよい。
　また、信号制御部５６０は、緊急車両情報に含まれる「位置情報」及び「移動速度」に基づいて、緊急車両が、制御対象の信号機Ｓが設けられている道路区間に何秒後に到達するかを推測し、緊急車両が当該道路区間に到達する所定時間前（例えば１０秒前）に、信号制御情報を送信するようにしてもよい。また、信号制御部５６０は、緊急車両情報に含まれる「位置情報」に基づいて、緊急車両が当該道路区間に到達する所定距離前（例えば１００メートル前）に到達したときに、信号制御情報を送信するようにしてもよい。この場合、信号制御部５６０は、信号制御情報を送信する時点における信号機Ｓの点灯状態に応じて、点灯状態の切り替え指令を含む信号制御情報を送信するか、又は、点灯状態の延長指令を含む信号制御情報を送信するかを決定する。このようにすることで、信号制御部５６０は、緊急車両が制御対象の信号機Ｓが設けられた道路区間を実際に走行する前に、当該道路区間の交通状況を改善させることができる。
　信号管制装置５０は、緊急車両が用務が完了する（目的地に到達する）まで、上記処理Ｐ５１を繰り返し実行する。これにより、信号管制装置５０は、緊急車両の走行予定経路が変更となった場合、事故等により道路区間の交通状況が変化した場合等であっても、その都度、緊急車両情報と交通状況変化量情報Ｄ３０とに基づいて、制御対象となる信号機Ｓを適切に選択して制御を行うことができる。 Next, the signal control unit 560 controls the traffic light S to be controlled selected in step S512 (step S513).
In the example of FIG. 9, according to the traffic condition change amount information D30, when the lighting state of the traffic light S20 is “green light”, the traffic condition of the road section B20a is greatly improved (“improvement (large)”). is expected. For this reason, the signal control unit 560 controls the traffic light S20 so that the lighting state of the traffic light S20 becomes “green light”. Specifically, when the latest signal switching information of the traffic light S20 acquired by the signal switching information acquisition unit 510 indicates that the lighting state of the traffic light S20 is other than “blue light”, the signal control unit 560 indicates the traffic light S20. Transmit signal control information including a command to switch to “green light”.
On the other hand, when the latest signal switching information of the traffic light S20 acquired by the signal switching information acquisition unit 510 indicates that the lighting state of the traffic light S20 is “green light”, the signal control unit 560 performs predetermined processing on the traffic light S20. Signal control information including an instruction to extend the lighting state of the “blue light” is transmitted for an extension time (for example, 10 seconds).
Note that the signal control unit 560 may estimate the time when the emergency vehicle passes the traffic light S20 based on the “position information” and the “movement speed” included in the emergency vehicle information. Then, the signal control unit 560 may set the extension time so that the lighting state of the “blue light” is continued until the time when the emergency vehicle is predicted to pass the traffic light S20.
In addition, the signal control unit 560 determines how many seconds later the emergency vehicle reaches the road section where the traffic signal S to be controlled is provided, based on the “position information” and “movement speed” included in the emergency vehicle information. The signal control information may be transmitted a predetermined time before the emergency vehicle reaches the road section (for example, 10 seconds before). In addition, the signal control unit 560 displays the signal control information when the emergency vehicle reaches a predetermined distance (for example, 100 meters before) reaching the road section based on the “position information” included in the emergency vehicle information. You may make it transmit. In this case, the signal control unit 560 transmits signal control information including a lighting state switching command or includes a lighting state extension command according to the lighting state of the traffic light S at the time of transmitting the signal control information. Determine whether to send signal control information. By doing in this way, the signal control part 560 can improve the traffic condition of the said road area, before an emergency vehicle actually drive | works the road area where the signal S to be controlled was provided.
The signal control device 50 repeatedly executes the process P51 until the emergency vehicle completes the service (arrives at the destination). As a result, the signal control device 50 can change the emergency vehicle information and the traffic situation each time, even if the planned travel route of the emergency vehicle is changed or the traffic situation of the road section changes due to an accident or the like. Based on the quantity information D30, the control can be performed by appropriately selecting the traffic light S to be controlled.
（信号管制装置のハードウェア構成）
　図１４は、本発明の一実施形態に係る信号管制装置のハードウェア構成の例を示す図である。
　以下、本実施形態の信号管制装置５０のハードウェア構成の例について、図１４を参照して説明する。 (Hardware configuration of signal control device)
FIG. 14 is a diagram illustrating an example of a hardware configuration of a signal control device according to an embodiment of the present invention.
Hereinafter, an example of a hardware configuration of the signal control device 50 of the present embodiment will be described with reference to FIG.
　コンピュータ９００は、ＣＰＵ９０１、主記憶装置９０２、補助記憶装置９０３、入出力インタフェース９０４、通信インタフェース９０５を備える。
　上述の信号管制装置５０は、コンピュータ９００に実装される。そして、上述した各処理部の動作は、プログラムの形式で補助記憶装置９０３に記憶されている。ＣＰＵ９０１は、プログラムを補助記憶装置９０３から読み出して主記憶装置９０２に展開し、当該プログラムに従って上記処理を実行する。また、ＣＰＵ９０１は、プログラムに従って、記録媒体４６０に対応する記憶領域を主記憶装置９０２に確保する。また、ＣＰＵ９０１は、プログラムに従って、処理中のデータを記憶する記憶領域を補助記憶装置９０３に確保する。なお、コンピュータ９００は、入出力インタフェース９０４を介して、外部記憶装置９１０と接続されており、記録媒体５８０に対応する記憶領域は外部記憶装置９１０に確保されてもよい。また、コンピュータ９００は、通信インタフェース９０５を介して、外部記憶装置９２０と接続されており、記録媒体５８０に対応する記憶領域は外部記憶装置９２０に確保されてもよい。 The computer 900 includes a CPU 901, a main storage device 902, an auxiliary storage device 903, an input / output interface 904, and a communication interface 905.
The signal control device 50 described above is mounted on the computer 900. The operation of each processing unit described above is stored in the auxiliary storage device 903 in the form of a program. The CPU 901 reads a program from the auxiliary storage device 903, develops it in the main storage device 902, and executes the above processing according to the program. In addition, the CPU 901 ensures a storage area corresponding to the recording medium 460 in the main storage device 902 according to the program. In addition, the CPU 901 ensures a storage area for storing data being processed in the auxiliary storage device 903 according to the program. Note that the computer 900 may be connected to the external storage device 910 via the input / output interface 904, and a storage area corresponding to the recording medium 580 may be secured in the external storage device 910. Further, the computer 900 may be connected to the external storage device 920 via the communication interface 905, and a storage area corresponding to the recording medium 580 may be secured in the external storage device 920.
　なお、少なくとも１つの実施形態において、補助記憶装置９０３は、一時的でない有形の媒体の一例である。一時的でない有形の媒体の他の例としては、入出力インタフェース９０４を介して接続される磁気ディスク、光磁気ディスク、ＣＤ－ＲＯＭ、ＤＶＤ－ＲＯＭ、半導体メモリ等が挙げられる。また、このプログラムが通信回線によってコンピュータ９００に配信される場合、配信を受けたコンピュータ９００が当該プログラムを主記憶装置９０２に展開し、上記処理を実行しても良い。 In at least one embodiment, the auxiliary storage device 903 is an example of a tangible medium that is not temporary. Other examples of the tangible medium that is not temporary include a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, and a semiconductor memory connected via the input / output interface 904. When this program is distributed to the computer 900 via a communication line, the computer 900 that has received the distribution may develop the program in the main storage device 902 and execute the above processing.
　また、当該プログラムは、前述した機能の一部を実現するためのものであっても良い。
さらに、当該プログラムは、前述した機能を補助記憶装置９０３に既に記憶されている他のプログラムとの組み合わせで実現するもの、いわゆる差分ファイル（差分プログラム）であっても良い。 The program may be for realizing a part of the functions described above.
Further, the program may be a so-called difference file (difference program) that realizes the above-described function in combination with another program already stored in the auxiliary storage device 903.
　また、信号管制装置５０は、１台のコンピュータ９００で構成されていても良いし、通信可能に接続された複数のコンピュータで構成されていてもよい。例えば、信号管制装置５０の各機能は、交通状況指標生成部２０が備えていてもよい。 Further, the signal control device 50 may be constituted by a single computer 900 or may be constituted by a plurality of computers connected so as to be communicable. For example, each function of the signal control device 50 may be included in the traffic condition index generation unit 20.
（作用効果） (Function and effect)
　以上のように、本実施形態に係る信号管制装置５０は、緊急車両の位置情報を含む緊急車両情報を取得する緊急車両情報取得部５４０と、信号機の点灯状態に応じた交通状況の変化量を道路区間別に示す交通状況変化量情報Ｄ３０を取得する交通状況変化量情報取得部５５０と、前記緊急車両情報と、前記交通状況変化量情報Ｄ３０とに基づいて、前記緊急車両が走行する道路区間に設けられた前記信号機Ｓの制御を行う信号制御部５６０と、を備えている。
　このようにすることで、信号制御部５６０は、交通状況変化量情報Ｄ３０に基づいて、緊急車両が走行する道路区間に設けられた信号機Ｓのうち、各信号機Ｓの点灯状態に応じて道路区間の交通状況を改善することが予想される信号機Ｓのみを選択して制御する。これにより、信号制御部５６０は、緊急車両が優先的にスムーズに走行できるように、緊急車両が走行する道路区間の交通状況を改善させることができる。
　また、緊急車両が優先的にスムーズに走行できるように信号機Ｓを制御することで、緊急車両が走行しない他の道路区間における交通が規制されて交通状況が悪化する等の影響が生じる可能性がある。しかしながら、信号制御部５６０は、緊急車両が走行する道路区間の信号機Ｓの制御を行っても交通状況が改善されないと予想される道路区間については、当該信号機Ｓの制御行わないため、他の道路区間の交通状況への影響を抑制することができる。 As described above, the signal control device 50 according to the present embodiment includes the emergency vehicle information acquisition unit 540 that acquires emergency vehicle information including the position information of the emergency vehicle, and the amount of change in the traffic situation according to the lighting state of the traffic light. Based on the traffic situation change amount information acquisition unit 550 that acquires the traffic situation change amount information D30 shown for each road section, the emergency vehicle information, and the traffic situation change amount information D30, the road section where the emergency vehicle travels is determined. And a signal control unit 560 that controls the traffic light S provided.
By doing in this way, the signal control part 560 is based on the traffic condition variation | change_quantity information D30, among the traffic lights S provided in the road area where an emergency vehicle drive | works, according to the lighting state of each traffic light S Only the traffic lights S that are expected to improve the traffic situation are selected and controlled. Thereby, the signal control part 560 can improve the traffic condition of the road area where an emergency vehicle drive | works so that an emergency vehicle can drive smoothly smoothly.
In addition, by controlling the traffic light S so that the emergency vehicle can preferentially and smoothly travel, there is a possibility that traffic on other road sections where the emergency vehicle does not travel is restricted and the traffic situation deteriorates. is there. However, the signal control unit 560 does not control the traffic light S for the road section where the traffic situation is expected not to be improved even if the traffic light S of the road section on which the emergency vehicle travels is controlled. The influence on the traffic situation of a section can be controlled.
　また、緊急車両情報には、緊急車両の走行予定経路が含まれている。交通状況変化量情報取得部５５０は、緊急車両情報の走行予定経路に含まれる各道路区間の交通状況変化量情報Ｄ３０を取得する。また、信号制御部５６０は、緊急車両情報と、走行予定経路に含まれる各道路区間の交通状況変化量情報Ｄ３０に基づいて、緊急車両が各道路区間に到達する前に、各道路区間に設けられた信号機Ｓの制御を行う。具体的には、信号制御部５６０は、緊急車両情報に含まれる「位置情報」及び「移動速度」に基づいて、緊急車両が道路区間に到達する所定時間前、又は、所定距離前に、制御対象の信号機Ｓの制御を行う。
　このようにすることで、信号制御部５６０は、緊急車両の走行予定経路に含まれる道路区間の交通状況を、緊急車両が各道路区間を走行する前に改善することができる。この結果、信号管制装置５０は、緊急車両を迅速且つスムーズに走行させることができる。 Further, the emergency vehicle information includes a planned travel route of the emergency vehicle. The traffic state change amount information acquisition unit 550 acquires the traffic state change amount information D30 of each road section included in the planned travel route of the emergency vehicle information. Further, the signal control unit 560 is provided in each road section before the emergency vehicle reaches each road section based on the emergency vehicle information and the traffic condition change amount information D30 of each road section included in the planned travel route. The received traffic light S is controlled. Specifically, the signal control unit 560 performs control based on the “position information” and “movement speed” included in the emergency vehicle information before a predetermined time or a predetermined distance before the emergency vehicle reaches the road section. The target traffic light S is controlled.
By doing in this way, the signal control part 560 can improve the traffic condition of the road area included in the driving plan route of an emergency vehicle, before an emergency vehicle drive | works each road area. As a result, the signal control device 50 can make the emergency vehicle run quickly and smoothly.
　また、信号管制装置５０は、信号機Ｓの点灯状態が切り替わったことを示す信号切替情報を取得する信号切替情報取得部５１０と、信号機Ｓが設けられた道路区間の交通状況指標を取得する交通状況指標取得部５２０と、信号機Ｓから信号切替情報を取得した時点における交通状況指標と、信号機Ｓから前回の信号切替情報を取得した時点における交通状況指標とに基づいて、信号機Ｓが設けられた道路区間の交通状況変化量情報Ｄ３０を生成する交通状況変化量情報生成部５３０と、を更に備える。
　このように、信号機の点灯状態が切り替わる度に交通状況変化量情報Ｄ３０を生成することにより、交通状況変化量情報生成部５３０は、日時、天候、事故等の様々な要因により現実の道路区間の交通状況が変化した場合であっても、このような変化に追従した交通状況変化量情報Ｄ３０をリアルタイムに生成することができる。この結果、信号制御部５６０は、現実の道路区間の交通状況に応じて、道路状況を改善する効果が大きい信号機Ｓを精度よく選択して制御することができる。 The signal control device 50 also acquires a signal switching information acquisition unit 510 that acquires signal switching information indicating that the lighting state of the traffic light S has been switched, and a traffic situation that acquires a traffic condition index of a road section where the traffic signal S is provided. The road on which the traffic signal S is provided based on the traffic condition index at the time when the signal acquisition information is acquired from the traffic light indicator S and the traffic condition index at the time when the previous signal switching information is acquired from the traffic light S. A traffic condition change amount information generation unit 530 that generates the traffic condition change amount information D30 of the section;
In this way, by generating the traffic situation change amount information D30 every time the traffic light is switched on, the traffic situation change amount information generation unit 530 can change the actual road section due to various factors such as date and time, weather, and accidents. Even when the traffic situation changes, the traffic situation change amount information D30 following such a change can be generated in real time. As a result, the signal control unit 560 can accurately select and control the traffic light S that has a large effect of improving the road condition according to the traffic condition of the actual road section.
　また、緊急車両情報取得部５４０は、緊急車両が用務が完了する（目的地に到達する）まで、緊急車両から緊急車両情報を取得する。交通状況変化量情報取得部５５０は、緊急車両情報取得部５４０が緊急車両情報を取得する度に、交通状況変化量情報Ｄ３０を記録媒体５８０から取得する。そして、信号制御部５６０は、緊急車両情報と交通状況変化量情報Ｄ３０とに基づいて、道路区間の交通状況を改善する効果が大きい信号機Ｓを選択して制御を行う処理を繰り返す。
　このようにすることで、信号管制装置５０は、緊急車両の走行予定経路が変更となった場合、事故等により道路区間の交通状況が変化した場合等であっても、その都度、緊急車両情報と交通状況変化量情報Ｄ３０とに基づいて、道路状況を改善する効果が大きい信号機Ｓを精度よく選択して制御することができる。 Further, the emergency vehicle information acquisition unit 540 acquires emergency vehicle information from the emergency vehicle until the emergency vehicle completes the service (arrives at the destination). The traffic situation change amount information acquisition unit 550 acquires the traffic situation change amount information D30 from the recording medium 580 every time the emergency vehicle information acquisition unit 540 acquires emergency vehicle information. And the signal control part 560 repeats the process which selects and controls the traffic light S with the big effect of improving the traffic condition of a road area based on emergency vehicle information and traffic condition change amount information D30.
By doing in this way, the signal control device 50 can provide emergency vehicle information every time, even when the planned travel route of the emergency vehicle is changed, or when the traffic situation of the road section changes due to an accident or the like. On the basis of the traffic condition change amount information D30, it is possible to accurately select and control the traffic light S that has a large effect of improving the road condition.
　また、信号管制装置５０は、信号制御部５６０が信号機Ｓを制御することによって通行が禁止される等の交通規制が行われる規制対象道路区間の規制情報を、当該規制対象道路区間に位置する一般車両に搭載された車載器Ａ２及び規制情報通知部Ｇの少なくとも一方へ送信する、規制情報送信部５７０を備えている。
　このようにすることで、規制情報送信部５７０は、車両の運転者に対し、緊急車両の走行に伴う規制情報を認識させることができる。
　これにより、規制情報送信部５７０は、緊急車両の運転者に走行予定経路における信号機Ｓの点灯状態、道路区間の交通状況等を認識させて、緊急車両がスムーズに走行するための支援を行うことができる。
　また、規制情報送信部５７０は、一般車両の運転者に緊急車両が走行する予定の道路区間及び規制対象道路区間を認識させて、これらの道路区間を避けて走行する等の行動を誘引することができる。この結果、規制情報送信部５７０は、緊急車両が優先的にスムーズに走行できるようにするとともに、規制対象道路区間において、渋滞等が生じて交通状況が悪化する可能性を低減させることができる。 Further, the signal control device 50 is configured so that the restriction information of the restriction target road section in which traffic restriction such as traffic is prohibited by the signal control unit 560 controlling the traffic light S is located in the restriction target road section. A regulation information transmission unit 570 that transmits to at least one of the on-vehicle device A2 and the regulation information notification unit G mounted on the vehicle is provided.
By doing in this way, the regulation information transmission part 570 can make the driver | operator of a vehicle recognize the regulation information accompanying driving | running | working of an emergency vehicle.
Accordingly, the regulation information transmission unit 570 makes the emergency vehicle driver recognize the lighting state of the traffic light S on the planned travel route, the traffic condition of the road section, etc., and provide support for the emergency vehicle to travel smoothly. Can do.
In addition, the regulation information transmission unit 570 causes the driver of the general vehicle to recognize the road section where the emergency vehicle is scheduled to travel and the road section subject to the regulation, and invites an action such as traveling while avoiding these road sections. Can do. As a result, the restriction information transmission unit 570 enables the emergency vehicle to travel smoothly with priority, and can reduce the possibility of traffic congestion and the like in the restricted road section, resulting in a worsening of traffic conditions.
　また、信号管制システム１は、信号管制装置５０と、複数の車両のそれぞれに搭載された車載器Ａの位置情報を含むプローブデータを収集するプローブデータ収集部１０と、プローブデータに基づいて、道路区間別の交通状況指標を生成して交通状況データベース３０に記録する交通状況指標生成部２０と、を備える。
　このようにすることで、交通状況指標生成部２０は、プローブデータ収集部１０が逐次収集するプローブデータに基づいて現実の道路区間の状況に応じた交通状況指標を生成することができる。このため、交通状況指標生成部２０は、交通状況指標の精度を高めることができる。また、信号管制装置５０は、このように精度の高い交通状況指標に基づいて、道路状況を改善する効果が大きい信号機Ｓを精度よく選択して制御することができる。 In addition, the signal control system 1 includes a signal control device 50, a probe data collection unit 10 that collects probe data including position information of the vehicle-mounted device A mounted in each of a plurality of vehicles, and a road based on the probe data. A traffic condition index generation unit 20 that generates a traffic condition index for each section and records it in the traffic condition database 30.
By doing in this way, the traffic condition parameter | index production | generation part 20 can produce | generate the traffic condition parameter | index according to the condition of the actual road area based on the probe data which the probe data collection part 10 collects sequentially. For this reason, the traffic condition index generation unit 20 can increase the accuracy of the traffic condition index. Further, the signal control device 50 can accurately select and control the traffic light S having a large effect of improving the road condition based on the traffic condition index with high accuracy.
　以上、本発明の実施形態について詳細に説明したが、本発明の技術的思想を逸脱しない限り、これらに限定されることはなく、多少の設計変更等も可能である。
　例えば、上述の実施形態において、信号制御部５６０は、道路区間の交通状況を改善する効果が大きい信号機Ｓを、制御対象の信号機として選択して制御を行う態様について説明したが、これに限られることはない。例えば、信号制御部５６０は、信号機Ｓを制御することにより、道路区間の交通状況が改善される場合は、改善の効果が小さい場合であっても、当該信号機Ｓを制御対象の信号機として選択し、制御を行うようにしてもよい。また、道路区間の交通状況、立地条件等に応じて、道路区間別に制御対象の信号機として選択する基準を変更してもよい。例えば、交通量が所定の値以上の道路区間では、改善の効果が大きい信号機Ｓのみを選択して制御し、交通量が所定の値よりも少ない道路区間では、改善の効果が小さい場合であっても、当該信号機Ｓを制御対象の信号機として選択して制御を行うようにしてもよい。 As mentioned above, although embodiment of this invention was described in detail, unless it deviates from the technical idea of this invention, it is not limited to these, A some design change etc. are possible.
For example, in the above-described embodiment, the signal control unit 560 has described the aspect in which the control is performed by selecting the traffic signal S that has a large effect of improving the traffic condition of the road section as the traffic signal to be controlled. There is nothing. For example, when the traffic condition of the road section is improved by controlling the traffic light S, the signal control unit 560 selects the traffic light S as the traffic signal to be controlled even if the improvement effect is small. Control may be performed. Moreover, according to the traffic condition of a road area, location conditions, etc., you may change the reference | standard selected as a traffic signal of a control object for every road area. For example, in a road section where the traffic volume is a predetermined value or more, only the traffic light S having a large improvement effect is selected and controlled, and in a road section where the traffic volume is less than a predetermined value, the improvement effect is small. Alternatively, the signal S may be selected as a control target signal to perform control.
　上述の信号管制装置、信号管制システム、信号管制方法及びプログラムによれば、緊急車両が走行する道路区間の交通状況を改善するとともに、緊急車両が走行しない道路区間の交通状況への影響を抑制することが可能である。 According to the signal control device, the signal control system, the signal control method and the program described above, the traffic situation of the road section where the emergency vehicle travels is improved and the influence on the traffic situation of the road section where the emergency vehicle does not travel is suppressed. It is possible.
１　信号管制システム
１０　プローブデータ収集部
２０　交通状況指標生成部
３０　交通状況データベース
５０　信号管制装置
５１０　信号切替情報取得部
５２０　交通状況指標取得部
５３０　交通状況変化量情報生成部
５４０　緊急車両情報取得部
５５０　交通状況変化量情報取得部
５６０　信号制御部
５７０　規制情報送信部
５８０　記録媒体
９００　コンピュータ
９０１　ＣＰＵ
９０２　主記憶装置
９０３　補助記憶装置
９０４　入出力インタフェース
９０５　通信インタフェース
９１０　外部記憶装置
９２０　外部記憶装置
Ａ　車載器
Ａ１　車載器（緊急車両）
Ａ２　車載器（一般車両）
Ｇ　規制情報通知部
ＮＷ　ネットワーク
Ｓ　信号機 1 Signal Control System 10 Probe Data Collection Unit 20 Traffic Situation Index Generation Unit 30 Traffic Situation Database 50 Signal Control Device 510 Signal Switching Information Acquisition Unit 520 Traffic Situation Index Acquisition Unit 530 Traffic Situation Change Information Generation Unit 540 Emergency Vehicle Information Acquisition Unit 550 Traffic state change amount information acquisition unit 560 Signal control unit 570 Regulation information transmission unit 580 Recording medium 900 Computer 901 CPU
902 Main storage device 903 Auxiliary storage device 904 Input / output interface 905 Communication interface 910 External storage device 920 External storage device A On-vehicle device A1 On-vehicle device (emergency vehicle)
A2 On-board device (general vehicle)
G regulation information notification part NW network S traffic light

Claims (7)

  1. 　緊急車両の位置情報を含む緊急車両情報を取得する緊急車両情報取得部と、
    　信号機の点灯状態に応じた交通状況の変化量を道路区間別に示す交通状況変化量情報を取得する交通状況変化量情報取得部と、
    　前記緊急車両情報と、前記交通状況変化量情報とに基づいて、前記緊急車両が走行する道路区間に設けられた前記信号機の制御を行う信号制御部と、
    　を備える信号管制装置。     An emergency vehicle information acquisition unit for acquiring emergency vehicle information including location information of the emergency vehicle;
    A traffic condition change amount information acquisition unit for acquiring traffic condition change amount information indicating a change amount of the traffic condition according to the lighting state of the traffic lights for each road section;
    Based on the emergency vehicle information and the traffic situation change amount information, a signal control unit that controls the traffic light provided in a road section on which the emergency vehicle travels,
    A signal control device comprising:
  2. 　前記緊急車両情報は、前記緊急車両の走行予定経路を更に含み、
    　前記交通状況変化量情報取得部は、前記走行予定経路に含まれる各道路区間の前記交通状況変化量情報を取得し、
    　前記信号制御部は、前記緊急車両情報と、前記走行予定経路に含まれる各道路区間の交通状況変化量情報とに基づいて、前記緊急車両が各道路区間に到達する前に、各道路区間に設けられた前記信号機の制御を行う、
    　請求項１に記載の信号管制装置。     The emergency vehicle information further includes a planned travel route of the emergency vehicle,
    The traffic state change amount information acquisition unit acquires the traffic state change amount information of each road section included in the planned travel route,
    Based on the emergency vehicle information and the traffic situation change amount information of each road section included in the planned travel route, the signal control unit determines whether the emergency vehicle has reached each road section before reaching the road section. Control the provided traffic lights,
    The signal control device according to claim 1.
  3. 　前記信号機の点灯状態が切り替わったことを示す信号切替情報を取得する信号切替情報取得部と、
    　前記信号機が設けられた道路区間の交通状況指標を取得する交通状況指標取得部と、
    　前記信号機から前記信号切替情報を取得した時点における前記交通状況指標と、当該信号機から前回の信号切替情報を取得した時点における前記交通状況指標とに基づいて、当該信号機が設けられた道路区間の交通状況変化量情報を生成する交通状況変化量情報生成部と、
    　を更に備える請求項１又は２に記載の信号管制装置。     A signal switching information acquisition unit for acquiring signal switching information indicating that the lighting state of the traffic light has been switched;
    A traffic condition index acquisition unit for acquiring a traffic condition index of a road section provided with the traffic signal;
    Based on the traffic condition index at the time of acquiring the signal switching information from the traffic light and the traffic condition index at the time of acquiring the previous signal switching information from the traffic light, traffic in the road section where the traffic signal is provided A traffic situation change amount information generation unit for generating situation change amount information;
    The signal control device according to claim 1, further comprising:
  4. 　前記信号制御部が前記信号機の制御を行うことによって交通規制が行われる規制対象道路区間の規制情報を、当該規制対象道路区間に位置する車両に搭載された車載器、及び、前記道路区間に設けられた規制情報通知部の少なくとも一方へ送信する、規制情報送信部を更に備える、請求項１から３の何れか一項に記載の信号管制装置。 The signal control unit is provided with on-vehicle equipment mounted on a vehicle located in the restricted road section and restriction information on the restricted road section in which traffic restriction is performed by controlling the traffic light, and the road section. The signal control device according to any one of claims 1 to 3, further comprising a restriction information transmission unit that transmits to at least one of the received restriction information notification units.
  5. 　請求項１から４の何れか一項に記載の信号管制装置と、
    　複数の車両のそれぞれに搭載された車載器の位置情報を含むプローブデータを収集するプローブデータ収集部と、
    　前記プローブデータに基づいて、道路区間別の交通状況指標を生成して交通状況データベースに記録する交通状況指標生成部と、
    　を備える信号管制システム。     A signal control device according to any one of claims 1 to 4,
    A probe data collection unit that collects probe data including position information of the vehicle-mounted device mounted on each of the plurality of vehicles;
    Based on the probe data, a traffic condition index generating unit that generates a traffic condition index for each road section and records it in a traffic condition database;
    A signal control system comprising:
  6. 　緊急車両の位置情報を含む緊急車両情報を取得する緊急車両情報取得ステップと、
    　信号機の点灯状態に応じた交通状況の変化量を道路区間別に示す交通状況変化量情報を取得する交通状況変化量情報取得ステップと、
    　前記緊急車両情報と、前記交通状況変化量情報とに基づいて、前記緊急車両が走行する道路区間に設けられた前記信号機の制御を行う信号制御ステップと、
    　を有する信号管制方法。     An emergency vehicle information acquisition step of acquiring emergency vehicle information including location information of the emergency vehicle;
    A traffic condition change amount information acquisition step for acquiring traffic condition change amount information indicating the change amount of the traffic condition according to the lighting state of the traffic lights for each road section;
    Based on the emergency vehicle information and the traffic situation change amount information, a signal control step for controlling the traffic light provided in a road section where the emergency vehicle travels,
    A signal control method comprising:
  7. 　信号管制装置のコンピュータを、
    　緊急車両の位置情報を含む緊急車両情報を取得する緊急車両情報取得部、
    　信号機の点灯状態に応じた交通状況の変化量を道路区間別に示す交通状況変化量情報を取得する交通状況変化量情報取得部、
    　前記緊急車両情報と、前記交通状況変化量情報とに基づいて、前記緊急車両が走行する道路区間に設けられた前記信号機の制御を行う信号制御部、
    　として機能させるプログラム。     Signal control computer,
    Emergency vehicle information acquisition unit for acquiring emergency vehicle information including location information of the emergency vehicle,
    A traffic condition change amount information acquisition unit for acquiring traffic condition change amount information indicating a change amount of the traffic condition according to the lighting state of the traffic lights for each road section,
    A signal control unit for controlling the traffic light provided in a road section on which the emergency vehicle travels based on the emergency vehicle information and the traffic situation change amount information;
    Program to function as.
PCT/JP2017/026477 2016-07-26 2017-07-21 Signal control device, signal control system, signal control method, and program WO2018021186A1 (en)

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