JP2009258938A - Traffic congestion information acquisition system and traffic congestion information acquisition method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a "traffic congestion information acquisition system and traffic congestion information acquisition method" for, in real time and continuously, acquiring congestion occurrence and congestion continuation circumstances after the congestion occurrence. <P>SOLUTION: A traffic congestion information acquisition system is composed of an in-vehicle unit and an information center. Each in-vehicle unit is provided with a first control part for, transmitting the result and the location of an own-vehicle at that time to the information center when it is detected that a hazard lamp has been turned on. The first control part transmits the vehicle speed and own-vehicle location of an own-vehicle to the information center when the notification of the traveling state of the own-vehicle is instructed from the information center. The information center is provided with a second control part for detecting the congestion occurrence spot from the location of the vehicle which has transmitted the information when acquiring the information showing that the hazard lamp has been turned on. The second control part specifies one vehicle from among the plurality of vehicles which have transmitted the information showing that the hazard lamp has been turned on, and continuously acquires the traveling circumstances of the vehicle, and detects a spot where traffic congestion is relieved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a traffic jam information acquisition system and a traffic jam information acquisition method, and more particularly to a traffic jam information acquisition system and a traffic jam information acquisition method capable of continuously acquiring a jam status based on lighting of a hazard lamp.

  For the purpose of alleviating traffic congestion, a technology for providing traffic conditions to a driver using a traffic information system such as VICS has been put into practical use.

  Traffic information systems such as VICS receive and collect information such as the position of vehicles passing underneath the information collecting and providing device using infrared rays called optical beacons installed on intersection roads, Traffic information such as traffic regulation status is provided from optical beacons to vehicles equipped with VICS compatible car navigation.

  In this way, by acquiring traffic information from the VICS Center, it is possible to grasp that there is a traffic jam on the route that is scheduled to pass. If a traffic jam occurs, the route will be bypassed. You can avoid traffic jams by taking the route.

  However, such VICS traffic information is basically limited to main trunk roads due to the cost of installing information collection and provision devices, etc., and there are many cases where information on other sections cannot be obtained. . Therefore, even if the route is changed based on traffic information based on VICS, it may occur that the vehicle is caught in a traffic jam on a road where no information collection / providing device is installed.

  On the other hand, a technique for detecting the occurrence of traffic jams is being investigated regardless of VICS. As a technology related to this, in Patent Document 1, when a hazard lamp of a vehicle flashes by manual operation of an occupant, information indicating that the hazard lamp is flashing is communicated from the vehicle to the following vehicle. The technology transmitted using is described.

On the other hand, in recent years, a telematics function for providing an information providing service by connecting a mobile phone to an in-vehicle information terminal and connecting to the Internet has been developed and put into practical use. As a technology related to the acquisition of the traffic jam situation using this telematics, in Patent Document 2, the information center that received the fact that the vehicle has turned on the hazard lamp causes a jam in vehicles in a predetermined range following the vehicle. A system is described that transmits information indicating that the vehicle is in operation and causes the hazard lamp to be turned on in a traffic jam immediately and appropriately in a necessary and sufficient vehicle.
Japanese Patent Laid-Open No. 2003-200782 JP 2006-259861 A

  As described above, when the vehicle turns on the hazard lamp, it is detected that a traffic jam has occurred, and it is possible to know the traffic jam occurrence point. In addition, by transmitting hazard lamp lighting information to the information center via a communication terminal (mobile phone), it is possible to detect traffic jams even in places other than the range covered by VICS information. Yes.

  However, at present, the travel center such as a hazard lamp is provided to the information center at a time interval that allows the cost of information transmission to be accepted by the user. In addition, the situation of traffic jams changes with the passage of time, and the points at which traffic jams are resolved and the points of occurrence also change from moment to moment. For example, when the information on the traffic jam occurrence point is acquired, it is determined that the vehicle is away from the host vehicle and it is not necessary for the driver to change the route to another road. It may be very close to the point. In this case, it is difficult to determine whether or not to change the route to another road, and there is a possibility that a situation where traffic congestion cannot be avoided may occur.

  In this way, the traffic congestion information estimated based on the vehicle position information acquired via the mobile phone, the uplink connection of the mobile phone is made at regular time intervals, and the traffic jam situation is immediately grasped Is difficult. Even if the hazard lamp is lit, it is difficult to clearly identify whether it is lit regardless of the traffic jam or whether it is lit to notify the traffic jam.

  The present invention has been made in view of the problems of the prior art, and is a traffic congestion information acquisition system and traffic congestion information acquisition that can immediately and continuously acquire the occurrence of a traffic jam and the traffic jam continuation status after the traffic jam has occurred. It aims to provide a method.

  In order to solve the above-described problems of the prior art, according to one aspect of the present invention, there is provided a traffic jam information acquisition system in which an in-vehicle device mounted on a plurality of vehicles and an information center are connected to be able to communicate with each other. The vehicle-mounted devices each include a hazard lamp lighting detection unit that detects that a hazard lamp is lit, a vehicle speed detection unit that detects a vehicle speed of the host vehicle, a host vehicle position detection unit that detects the host vehicle position, and the information The first communication unit that communicates with the center and the hazard lamp lighting information from the hazard lighting detection unit, when the hazard lamp lighting information is acquired, the hazard lamp is lit and the vehicle position when the hazard lamp is lit Is transmitted to the information center via the first communication unit, and the first control unit is instructed to notify the traveling state of the host vehicle from the information center. The vehicle speed and the vehicle position of the host vehicle are transmitted to the information center via the first communication unit at predetermined time intervals, the information center includes a storage unit storing map data, A second communication unit that communicates with the vehicle-mounted device, and second information for detecting a traffic jam occurrence point from the position of the vehicle that transmitted the information and the map data when information indicating that the hazard lamp is turned on is acquired. The second control unit identifies one vehicle from a plurality of vehicles that have transmitted information indicating that the hazard lamp has been turned on, and continuously monitors the running status of the vehicle after the hazard lamp is turned on. A traffic congestion information acquisition system characterized by acquiring and detecting a congestion elimination point is provided.

  In the traffic congestion information acquisition system according to the above aspect, the information indicating that the hazard lamp is turned on may be acquired from at least two vehicles within a predetermined distance range within a predetermined time. The second control unit may set a point where the traveling speed acquired from the identified vehicle is equal to or higher than a predetermined speed as a congestion elimination point.

  Moreover, in the traffic congestion information acquisition system according to the above aspect, the second control unit transmits GPS position information among the plurality of vehicle position information that transmitted information indicating that the hazard lamp has been turned on. The position of the vehicle may be set as a traffic jam occurrence point, and the second control unit includes the position information by GPS in the position information of the plurality of vehicles that transmitted the information indicating that the hazard lamp is turned on. When the signal transmitted from the first communication unit is received by the second communication unit via the same base station, the plurality of vehicles are in the communication area of the base station. It may be determined that the vehicle is traveling on an inner road, the position of the vehicle is corrected, and the corrected position may be set as a traffic jam occurrence point.

  In the traffic jam information acquisition system according to this embodiment, when the vehicle turns on the hazard lamp, uplink activation is performed and the vehicle position and the hazard lamp are turned on are transmitted to the information center. In the information center, by acquiring information that the hazard lamps are lit from a plurality of vehicles at the same time, it is determined that the traffic jam has occurred and the traffic jam occurrence point. Furthermore, the vehicle which provided the information center to the information center that the hazard lamp was turned on is specified, and the position and speed of the vehicle are continuously acquired. As a result, it is possible to accurately acquire a traffic jam occurrence point, and it is also possible to acquire a point where the traffic jam has been resolved. Furthermore, it becomes possible to immediately acquire the traffic situation after the traffic jam occurs. By providing information on the occurrence and resolution of traffic congestion to the vehicle from the information center, it becomes possible to know the traffic congestion point and the traffic congestion resolution point, avoiding the traffic congestion point, and generating traffic congestion from the distance to the traffic congestion resolution point as it is Thus, it is possible to make a decision such as traveling on the route, and thus contribute to safe driving.

  Moreover, according to the other form of this invention, the traffic congestion information acquisition method implemented in the traffic congestion information acquisition system which concerns on said form is provided. The traffic jam information acquisition method according to the embodiment is a traffic jam information acquisition method in a traffic jam information acquisition system in which an in-vehicle device mounted on a plurality of vehicles and an information center are connected to be able to communicate with each other. The control unit of the vehicle-mounted device transmits a notification that the hazard lamp is turned on and the vehicle position when the hazard lamp is turned on to the information center, and that the information center notifies the traveling state of the vehicle. When the instruction is received, the vehicle speed and the vehicle position of the host vehicle are transmitted to the information center every predetermined time, and the control unit of the information center indicates that the hazard lamp is turned on. A step of acquiring information, a step of detecting a traffic jam occurrence point based on the position of the vehicle that transmitted the information, and a vehicle from a plurality of vehicles that transmitted the information. A step of transmitting to the specified vehicle an instruction to notify the vehicle driving condition continuously, and a step of detecting a traffic jam elimination point based on the driving condition acquired from the specific vehicle It is characterized by having.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing a configuration of a traffic jam information acquisition system 100 according to an embodiment of the present invention. In the traffic jam information acquisition system 100, the in-vehicle device 10 and the information center 20 are connected by a wireless communication line.

  The in-vehicle device 10 basically includes a hazard lamp 15, a hazard lamp lighting detection unit 11, a GPS receiver 13, a self-contained navigation sensor 12, a communication unit 16, a VICS receiver 17, and a control unit 14. .

  The GPS receiver 13 receives GPS signals sent from a plurality of GPS satellites and receives GPS data such as longitude, latitude, PDOP (Position DOP) value, and HDOP (Horizontal DOP) value of the current position of the vehicle. Generate and output.

  The self-contained navigation sensor 12 includes an angle sensor such as a gyro that detects a vehicle rotation angle, and a travel distance sensor that generates a pulse at every constant travel distance, and is used to detect the travel speed of the host vehicle. It is done.

  The communication unit 16 is for communicating with various service centers such as the information center 20, and is specifically an in-vehicle phone or a mobile phone. The VICS receiver 17 receives VICS (road traffic information communication system) information transmitted from a radio wave beacon or an optical beacon. These beacons are installed on intersection roads or on the roadside, and connected to the police station, road manager, and information center 20 to provide information on traffic jams in the vicinity.

  The control part 14 is comprised, for example with a microcomputer, and controls each said part. In particular, the position of the host vehicle is detected based on a signal output from the GPS receiver 13, and the traveling speed of the host vehicle is calculated based on a signal output from the self-contained navigation sensor 12. Further, when it is detected that the hazard lamp 15 is turned on, the fact is transmitted to the information center 20 via the communication unit 16.

  On the other hand, the information center 20 side basically includes a communication unit 21, a storage unit 22, and a control unit 23.

  The communication unit 21 receives information such as vehicle hazard lamp lighting information and vehicle position transmitted from the in-vehicle device 10. The storage unit 22 stores information such as map data, the position of the communication base station of the mobile phone, and the communication area of the base station. In addition, vehicle information for continuously detecting traffic jam points and traffic jams, and information such as traffic jam elimination points are stored.

  The control part 23 is comprised, for example with a microcomputer, and controls each said part. In particular, the traffic jam occurrence point is calculated from the lighting information of the hazard lamp 15 or the vehicle status is continuously acquired to detect the status after the traffic jam occurs and the traffic jam status with high accuracy until the traffic jam is resolved.

  A highly accurate traffic information acquisition operation in the traffic traffic information acquisition system 100 configured as described above will be described below.

  FIG. 2 is a conceptual diagram for explaining the traffic information acquisition operation. FIG. 2A shows a situation in which the host vehicle A approaches the last vehicle B at the point where the traffic jam occurs. In such a situation, the driver turns on the hazard lamp to notify the subsequent vehicle that there is a traffic jam. At the same time, the fact that the hazard lamp is lit is transmitted to a predetermined information center 20 via the communication unit 16 such as a mobile phone.

  When the information center 20 receives the fact that the hazard lamp has been turned on and the vehicle position information, the information center 20 determines that a traffic jam has occurred at that position, and determines the identification number of the vehicle that transmitted the signal, the position of the vehicle, and the received time. Store in the storage.

  Thereafter, the information center 20 continuously transmits a signal indicating notification of traffic congestion status to the vehicle that has transmitted information indicating that the hazard lamp has been turned on. This vehicle is called a traffic condition acquisition target vehicle. For example, a signal to notify the speed and position of the traffic condition acquisition target vehicle every minute is transmitted.

  The traffic situation acquisition target vehicle A transmits the running situation (vehicle speed and position) to the information center 20 every time specified by the information center 20 even when the vehicle A is running in a traffic jam section as shown in FIG. To do.

  The information center 20 receives information on the vehicle speed of the traffic condition acquisition target vehicle, and determines that the traffic jam continues when the vehicle is not traveling at a predetermined speed (corresponding to FIG. 2B). Each time information from is acquired, information such as the vehicle position and acquisition time is stored in the storage unit 22. Then, when the traffic condition acquisition target vehicle travels at a predetermined speed or higher (corresponding to FIG. 2C), it is determined that the traffic congestion has been eliminated, and the information is stored in the storage unit 22.

  In this way, by receiving information on the fact that the hazard lamp of the vehicle has been turned on, the location of the occurrence of traffic jam is detected, and thereafter the vehicle driving status is continuously acquired to obtain a highly accurate traffic jam status. be able to.

  Note that when determining the occurrence of a traffic jam based on the information on the hazard lamp lighting, it may not be determined whether only one device is lit to notify the traffic jam. For example, the hazard lamp may be turned on when the vehicle stops on the roadside belt due to a failure or the like. For this reason, it is desirable to determine that a traffic jam has occurred at that point when the information on the hazard lamp lighting is received from a predetermined range from at least two vehicles almost simultaneously.

  In the block diagram of FIG. 1, the in-vehicle device 10 includes the GPS receiver 13. However, the in-vehicle device 10 may include a device that can identify the position of the own vehicle even when the GPS receiver 13 is not provided. That's fine. For example, a mobile phone is used as the communication unit 16, but the location of the mobile phone may be the vehicle position.

  Hereinafter, the traffic jam information acquisition process in the traffic jam information acquisition system 100 according to the present embodiment will be described with reference to FIGS. FIG. 3 shows an example of a travel status notification processing flow performed by the control unit 14 on the vehicle-mounted device 10 side, and FIG. 4 shows an example of a traffic jam status determination processing flow performed by the control unit 23 on the information center 20 side. FIG. 5 shows an example of a traffic jam occurrence point determination process flow for determining a traffic jam occurrence point based on hazard lamp lighting information from a plurality of vehicles, and FIG. 6 is a diagram for explaining a process for judging a traffic jam occurrence point. is there.

  First, in the first step S11 of FIG. 3, it is determined by the signal from the hazard lamp lighting detection unit whether or not the hazard lamp of the host vehicle is lit, and when it is lit, the process proceeds to step S12 and is not lit. When you wait.

  In the next step S12, the position of the own vehicle when the hazard lamp is turned on is detected based on the GPS signal received by the GPS receiver 13 and the signal detected by the self-contained navigation sensor 12, and the position of the own vehicle is detected. The information indicating that the hazard lamp is turned on is transmitted to the information center 20 via the communication unit 16.

  In the next step S <b> 13, it is determined whether or not a signal indicating that the vehicle traveling state is continuously notified from the information center 20 has been received. When a signal to that effect is received, the process proceeds to step S14, and when the signal is not received, the traveling state notification process is terminated. In the continuous travel status notification, the travel speed of the vehicle and the position information of the vehicle are notified, and the notification time interval to the information center 20 is specified. In particular, the notification time interval is specified to be notified at short intervals, for example, every minute, in order to obtain an immediate traffic situation.

  In the next step S14, according to the designation from the information center 20, the information center 20 is notified of the position and vehicle speed of the host vehicle at predetermined time intervals.

  In the next step S15, it is determined whether or not there has been an instruction to cancel the continuous running status notification from the information center 20. While there is no instruction to that effect, the process returns to step S14 to continue to transmit the traveling state to the information center 20, and when there is a cancellation instruction, the traveling state notification process ends.

  Next, the traffic situation determination process performed by the control unit 23 on the information center 20 side of the traffic jam information acquisition system 100 will be described with reference to the flowchart of FIG.

  First, in the first step S21, information indicating that the hazard lamp has been turned on is acquired from the in-vehicle device 10. This information includes position information of the vehicle whose hazard lamp is turned on.

  In the next step S22, the position of the vehicle that has transmitted the hazard lamp lighting information is determined as a traffic jam occurrence point, and the position and time are stored in the storage unit 22 as the traffic jam occurrence position and time. Note that when the hazard lamp lighting information is acquired from a plurality of vehicles within a predetermined range within a predetermined time, any one of those vehicles may be set as a traffic jam occurrence position.

  In the next step S23, in order to continuously acquire the traffic jam situation, a traffic situation acquisition target vehicle (hereinafter also simply referred to as a target vehicle) for grasping the traveling situation is specified. The target vehicle is identified as the vehicle that transmitted the hazard lamp lighting information. When the hazard lamp lighting information is acquired from a predetermined range from a plurality of vehicles within a predetermined time, one of those vehicles is selected. One vehicle may be the target vehicle.

  In the next step S24, a signal for notifying the information center 20 of vehicle position and vehicle speed information is transmitted to the target vehicle specified in step S23 at predetermined time intervals.

  In the next step S25, information on the driving situation (vehicle position and vehicle speed) is continuously acquired from the target vehicle at a specified time interval. The acquired information is recorded in the storage unit 22.

  In the next step S26, it is determined whether or not the vehicle speed of the target vehicle has exceeded a predetermined speed. If the vehicle is traveling at a predetermined speed, for example, 50 km / h, it is determined that the traffic has been eliminated. On the other hand, if the vehicle is traveling at a predetermined speed or less, it is determined that the road on which the target vehicle is traveling is still congested, and the process returns to step S25, and information on the vehicle position and vehicle speed from the target vehicle is continuously obtained. get.

  When the target vehicle is traveling at a predetermined speed or more, the process proceeds to step S27, where the position is determined as a congestion elimination position and stored in the storage unit 22, and the continuous travel status notification is canceled for the target vehicle. The instruction is transmitted, and the traffic jam situation determination process ends.

  Next, the traffic jam occurrence point determination process will be described with reference to FIGS. 5 and 6.

  First, in the first step S31, hazard lamp lighting information from a plurality of vehicles is acquired.

  In the next step S32, it is determined whether or not the hazard lamp lighting information acquired in step S31 is information from within a predetermined range within a predetermined time. The predetermined time is, for example, within 1 minute, and the predetermined range is, for example, a 500 m square range. If the information is not within the predetermined time and within the predetermined range, it is determined that the hazard lamp for notifying the traffic jam is not lit, and waits. If at least two pieces of information acquired from step S31 are information within a predetermined time and within a predetermined range, the process proceeds to step S33.

  In the next step S33, it is determined whether or not the position information acquired in step S31 includes position information based on GPS detected based on the GPS signal received by the GPS receiver. When the position information by GPS is included, the process proceeds to step S34, and when the position information by GPS is not included, the process proceeds to step S36.

  Whether or not the position information is based on GPS is determined based on the position information transmitted from the in-vehicle device 10. For example, as shown in FIG. 6A, it is assumed that the lighting information of the hazard lamps is transmitted to the information center 20 from three vehicles. In FIG. 6 (a), a vehicle C1 that includes a navigation device and whose position information is detected by a GPS receiver mounted in the navigation, and a navigation cell is not provided and the mobile cell position of the mobile phone is located in the information center 20. The transmitted vehicle C2 and the vehicle C3 in which the navigation device is not provided and the position of the mobile phone having the GPS function is transmitted to the information center 20 are illustrated. These three types of position information are transmitted to the information center 20 together with the acquisition form.

  In the next step S34, when the position information by GPS is included in the vehicle information acquired in step S31, the position of the vehicle that has transmitted the position information other than the position information by GPS is determined by the GPS. Correct to position.

  FIG. 6B shows each vehicle when information including the vehicle position from the vehicles (62, 63, 64) shown in FIG. 6A is transmitted to the information center 20 via the base station 61. It is the figure which showed the position (C1, C2, C3). In this case, since the position information C1 of the vehicle 62 is information based on the signal from the GPS receiver of the navigation device, the position information (C2, C3) of the other vehicle (63, 64) is corrected. For example, the vehicle position C2 is corrected to a position on the traveling path of the road 65 that is the shortest distance from C2 and the vehicle position C1 is traveling. The vehicle position C3 is similarly corrected.

  In the next step S35, a traffic jam occurrence point when the position information by GPS is included is determined. In this case, a position based on GPS is set as a traffic jam occurrence position. If a plurality of pieces of GPS position information are included, information from any one of them, for example, the rearmost position may be set as the traffic jam occurrence position.

  On the other hand, when the position information by GPS is not included, there is no guarantee that the accuracy of the transmitted position information is high. Therefore, a traffic jam occurrence point is specified based on a plurality of pieces of position information.

  In step S36, it is detected whether all the hazard lamp lighting information has been transmitted through the same base station. When a plurality of hazard lamp lighting information is transmitted via different base stations, it is not determined that the information has been transmitted from within a predetermined range, and it cannot be determined that the hazard lamp has been lit for traffic jam notification. Therefore, in this case, the process returns to step S31, and further information on hazard lamp lighting is acquired. When the hazard lamp lighting information is transmitted through the same base station, the process proceeds to step S37.

  In addition, one base station for signal relay of a cellular phone usually has a communication area of several to tens of kilometers square. The base station also divides the communication area into a plurality of sectors. Therefore, when determining whether or not they are the same base station, the determination may be made depending on whether or not the signals are from the same sector of the same base station.

  In the next step S37, the road on which the vehicle whose hazard lamp is lit is running is set as the road within or closest to the communication area of the base station referred to in the determination in step S36. Then, the position of the vehicle is corrected to be the position on the road.

  In FIG. 6A, it is assumed that the vehicle 62 does not exist. In this case, it is assumed that there is no vehicle that includes a navigation device and transmits position information by GPS to the information center 20, and the information center 20 has acquired position information from which the accuracy is not guaranteed from the vehicles 63 and 64. When the information from the vehicles 63 and 64 is transmitted to the information center 20 through the same base station 61, it is determined that these vehicles are traveling on the road in the communication area of the base station. The position C2 of the vehicle 63 in (b) is corrected to the position C2 in FIG. The same applies to the position of the vehicle 64.

  In the next step S38, a traffic jam occurrence point is determined on the road determined in step S37, based on a plurality of pieces of position information on which the vehicle position is corrected. For example, the position of the last vehicle among a plurality of vehicles whose vehicle positions have been corrected is determined as a traffic jam occurrence point.

  As described above, in the traffic jam information acquisition system according to the present embodiment, when the vehicle turns on the hazard lamp, uplink activation is performed and information indicating that the vehicle position and the hazard lamp are turned on is sent to the information center. Send. In the information center, information indicating that the hazard lamps have been lit from a plurality of vehicles at the same time is acquired to identify that the traffic jam has occurred and the traffic jam occurrence point. Furthermore, one vehicle is identified from the vehicles that have provided information indicating that the hazard lamps have been lit to the information center, and the vehicle position and vehicle speed of the vehicle are continuously acquired. As a result, it is possible to accurately acquire a traffic jam occurrence point, and it is also possible to acquire a point where the traffic jam has been resolved. Furthermore, it becomes possible to immediately acquire the traffic situation after the traffic jam occurs. By providing this information on the occurrence and resolution of traffic jams to the vehicle from the information center, it becomes possible to immediately know the traffic jam occurrence point and the traffic jam elimination point, avoiding the traffic jam point, and from the distance to the traffic jam elimination point It is possible to determine that the vehicle travels on a route in which a traffic jam occurs as it is, and as a result, it is possible to contribute to safe driving.

It is a block diagram which shows the structure of the traffic congestion information acquisition system which concerns on embodiment of this invention. It is the figure which showed notion traffic congestion information notionally. It is a flowchart which shows an example of the driving | running | working condition notification process which the control part by the vehicle equipment side of the traffic congestion information acquisition system which concerns on FIG. 1 performs. It is a flowchart which shows an example of the traffic condition determination process which the control part by the side of the information center of the traffic congestion information acquisition system which concerns on FIG. It is a flowchart which shows an example of the traffic congestion location determination processing which the control part by the side of the information center of the traffic congestion information acquisition system which concerns on FIG. It is a figure explaining a traffic jam generating point determination process.

Explanation of symbols

100 ... Traffic jam information acquisition system,
10: On-board machine,
11 ... Hazard lamp lighting detection unit,
12 ... Self-contained navigation sensor,
13 ... GPS receiver,
14 ... Control unit (on-vehicle device side, first control unit),
15 ... Hazard lamp,
16: Communication unit (on-vehicle device side, first communication unit),
20. Information center,
21 ... Communication unit (information center side, second communication unit),
22 ... storage part,
23. Control unit (information center side, second control unit).

Claims (6)

A traffic jam information acquisition system in which an in-vehicle device mounted on a plurality of vehicles and an information center are connected to be able to communicate with each other,
Each in-vehicle device is
A hazard lamp lighting detection unit for detecting that the hazard lamp is lit,
A vehicle speed detector for detecting the vehicle speed of the host vehicle;
A vehicle position detection unit for detecting the vehicle position;
A first communication unit that communicates with the information center;
When the information indicating that the hazard lamp is lit is acquired from the hazard lighting detection unit, the fact that the hazard lamp is lit and the vehicle position when the hazard lamp is lit are set in the information center to the first communication unit. A first control unit for transmitting via
When there is an instruction to notify the traveling state of the host vehicle from the information center, the first control unit sends the vehicle speed and the host vehicle position of the host vehicle to the information center every predetermined time. Sent via the communication section,
The information center
A storage unit storing map data;
A second communication unit for communication connection with the in-vehicle device;
A second control unit that detects a traffic jam occurrence point from the position of the vehicle that transmitted the information and the map data when the information indicating that the hazard lamp is turned on is provided;
The second control unit identifies one vehicle from a plurality of vehicles that have transmitted information indicating that the hazard lamp has been lit, continuously acquires the vehicle running status after the hazard lamp is lit, A traffic jam information acquisition system characterized by detecting a cancellation point.   The traffic congestion information acquisition system according to claim 1, wherein the information indicating that the hazard lamp has been turned on is acquired from at least two vehicles within a predetermined distance range within a predetermined time.   The traffic congestion information acquisition system according to claim 1, wherein the second control unit sets a point where a traveling speed acquired from the specified vehicle is equal to or higher than a predetermined speed as a congestion elimination point.   The second control unit sets the position of the vehicle that transmitted the position information by GPS among the position information of the plurality of vehicles that transmitted the information indicating that the hazard lamp has been turned on as a congestion occurrence point. The traffic jam information acquisition system according to claim 1.   The second control unit transmits the information from the first communication unit when the positional information of the plurality of vehicles that transmitted the information indicating that the hazard lamp is lit does not include GPS positional information. When the received signal is received by the second communication unit via the same base station, it is determined that the plurality of vehicles are traveling on a road in the communication area of the base station, and The traffic congestion information acquisition system according to claim 1, wherein the position is corrected, and the corrected position is set as a traffic jam occurrence point. A traffic jam information acquisition method in a traffic jam information acquisition system in which an in-vehicle device mounted on a plurality of vehicles and an information center are connected to be able to communicate with each other,
The control unit of the in-vehicle device is
Transmitting the fact that the hazard lamp is turned on and the vehicle position when the hazard lamp is turned on to the information center;
When receiving an instruction to notify the traveling state of the host vehicle from the information center, the vehicle transmits a vehicle speed and a host vehicle position of the host vehicle to the information center every predetermined time.
The control unit of the information center
Obtaining information indicating that the hazard lamp has been turned on;
Detecting a traffic jam occurrence point based on the position of the vehicle that transmitted the information;
Identifying one vehicle from a plurality of vehicles that have transmitted the information;
A step of transmitting to the identified vehicle an instruction to continuously notify the traveling state of the vehicle;
And a step of detecting a traffic jam elimination point on the basis of a travel situation obtained from the specific vehicle.

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