JP2010067174A - System, method, and program for generating traffic information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system, method, and program for generating traffic information, which improve reliability of determining a congestion state. <P>SOLUTION: An in-vehicle system 2 acquires traveling data 21 between traffic lights adjacent to each other through which a vehicle travels, acquires a preset congestion reference value from congestion reference data 20, acquires information on an offset area showing a traffic light group having an offset for a lighting state of traffic lights from a statistic server 5, corrects the congestion reference value for the traffic lights adjacent to each other included in the same offset area on the basis of the information on the offset area and sets the corrected congestion reference value as a congestion determination value. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a traffic information generation system, a traffic information generation method, and a traffic information generation program.

  Conventionally, road traffic information that indicates a traffic jam section is collected by collecting data indicating traffic conditions or vehicle driving conditions from sensors installed on the roadside or each vehicle traveling on the road, and statistically analyzing these data. A method of generating is devised.

For example, in the method described in Patent Document 1, the number of vehicles passing through each monitoring point and the average speed of each vehicle are obtained at the monitoring points set at a plurality of locations along the vehicle traffic direction of the road. Then, it is determined whether or not there is a section in which the acquired average speed is lower than a predetermined traffic congestion determination speed, and a section where the acquired average speed is lower than the traffic congestion determination speed is set as a traffic congestion section.
JP 2003-272089 A

  However, the traffic signal may have system control to link the lighting state with other adjacent traffic lights, both in the section where the system control is executed and the section where the system control is not executed, If the traffic jam is determined using a uniform average speed or the like, the traffic jam may not be accurately determined depending on the section.

  For example, in the traffic light in the section where the system control is executed, when the lighting state is controlled so that the vehicle can easily pass through the traffic light, it is affected by the lighting state of the traffic light in the section before the traffic signal. Therefore, the average speed becomes higher compared to other sections. In this way, there is a possibility that accurate traffic congestion judgment cannot be performed if all the sections are judged with a uniform threshold value even though there is a difference (variation) in the average vehicle speed of each section due to the influence of the traffic signal system control. There is.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a traffic information generation system, a traffic information generation method, and a traffic information generation program capable of improving the reliability of traffic jam determination. is there.

  In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a travel information acquisition means for acquiring travel information between adjacent traffic signals that the vehicle has passed, and a reference for acquiring a preset traffic jam reference value. A value acquisition unit, an information acquisition unit that acquires information about an offset region indicating a traffic signal group that is offset with respect to a lighting state of the traffic signal, and the mutual information included in the same offset region based on the information about the offset region Correction value setting means for correcting the traffic jam reference value between adjacent traffic lights and setting as a traffic jam judgment value, and travel information corresponding to traffic signals adjacent to each other included in the same offset area, the traffic jam judgment value And a traffic jam judging means for judging a traffic jam degree between traffic signals that the vehicle has passed.

According to a second aspect of the present invention, in the traffic information generation system according to the first aspect, the information related to the offset area is information in which the offset area and weight information for a traveling direction in the offset area are associated with each other. And the determination value setting means corrects the traffic jam reference value for each traveling direction between traffic signals adjacent to each other included in the same offset area based on the weight information, and obtains a traffic jam judgment value for each traveling direction. The gist is to set.

  The invention according to claim 3 is a travel information acquisition unit that acquires travel information between adjacent traffic signals that the vehicle has passed, a reference value acquisition unit that acquires a preset traffic jam reference value, and a lighting state of the traffic signal Included in the same offset area, and information acquisition means for acquiring information related to the offset area in which the offset area indicating the traffic signal group that is offset with respect to the weight information for the traveling direction in the offset area is associated For traffic signals adjacent to each other, a value obtained by correcting the traffic congestion reference value for each traveling direction based on the weight information is set as a traffic congestion determination value, and between traffic signals adjacent to each other included in different offset areas, A value that is more difficult to determine as a traffic jam than the traffic jam reference value is set as a traffic jam judgment value, and at least of adjacent traffic lights A determination value setting means for setting the traffic jam reference value as a traffic jam judgment value for traffic signals not included in the offset area, and adjacent traffic signals that the vehicle has passed based on the travel information and the traffic jam judgment value The gist of the present invention is that it is provided with a traffic jam judging means for judging a traffic jam level between the two.

  According to a fourth aspect of the present invention, in the traffic information generation method using the control means for performing traffic jam determination, the control means acquires travel information between adjacent traffic signals that the vehicle has passed, and is set in advance. A reference value is acquired, information on an offset region indicating a traffic signal group that is offset with respect to a lighting state of the traffic signal is acquired, and traffic signals adjacent to each other included in the same offset region are acquired based on the information on the offset region. The traffic jam reference value is corrected for the interval, set as a traffic jam judgment value, and the vehicle passes based on the traffic jam judgment value for travel information corresponding to traffic signals adjacent to each other included in the same offset area. The gist is to determine the degree of congestion between traffic lights.

  According to a fifth aspect of the present invention, in the traffic information generation program using the control means for performing traffic jam determination, the control means includes travel information acquisition means for acquiring travel information between adjacent traffic signals that the vehicle has passed, Reference value acquisition means for acquiring a preset traffic jam reference value, information acquisition means for acquiring information on an offset area indicating a traffic signal group that is offset with respect to the lighting state of the traffic lights, and information on the offset area Based on a judgment value setting means for correcting the traffic jam reference value between adjacent traffic signals included in the same offset region and setting as a traffic jam judgment value, and between adjacent traffic signals included in the same offset region For the corresponding travel information, the traffic information for determining the degree of traffic congestion between traffic signals that the vehicle has passed based on the traffic congestion determination value. And summarized in that to function as a determination unit.

  According to a sixth aspect of the present invention, in the traffic information generation method using the control means for performing traffic jam determination, the control means acquires travel information between adjacent traffic signals through which the vehicle has passed, and is preset traffic jam Obtain a reference value, obtain information on an offset region in which an offset region indicating a traffic signal group that is offset with respect to a lighting state of the traffic light and weight information for a traveling direction in the offset region are associated with each other, and A value obtained by correcting the traffic jam reference value for each traveling direction based on the weight information, with respect to between adjacent traffic signals that are included in the same offset region, for both adjacent traffic signals included in the offset region. Set as a traffic jam judgment value, and between the adjacent traffic lights included in different offset areas, Set a value that is more difficult to determine as a traffic jam than a traffic jam reference value as a traffic jam judgment value, and set the traffic jam reference value as a traffic jam judgment value for traffic signals that do not include at least one of the adjacent traffic lights in the offset area, The gist is to determine the degree of congestion between adjacent traffic signals that the vehicle has passed based on the travel information and the congestion determination value.

  The invention according to claim 7 is the traffic information generation program using the control means for determining the traffic jam, the control means, the travel information acquisition means for acquiring the travel information between the adjacent traffic signals that the vehicle has passed, Reference value acquisition means for acquiring a preset traffic jam reference value, an offset area indicating a group of traffic signals that are offset with respect to the lighting state of the traffic lights, and weight information for the traveling direction in the offset area are associated with each other. Based on the weight information, between information acquisition means for acquiring information related to the offset area and between traffic signals in which both adjacent traffic signals are included in the offset region, between adjacent traffic signals in each of the same offset region Set the traffic jam reference value as the traffic jam judgment value for each direction of travel. For traffic signals adjacent to each other included in the offset area, a value that is less likely to be determined as traffic jam than the traffic jam reference value is set as a traffic jam determination value, and at least one of the adjacent traffic lights is between traffic signals not included in the offset area. On the other hand, determination value setting means for setting the traffic congestion reference value as a traffic congestion determination value, and traffic congestion determination means for determining the degree of congestion between adjacent traffic signals that the vehicle has passed based on the travel information and the traffic congestion determination value. It is made to function as.

  According to the first aspect of the present invention, travel information between traffic signals adjacent to each other through which the vehicle has passed is acquired, and a preset congestion reference value is acquired. Further, information on an offset area indicating a traffic signal group that is offset with respect to the lighting state of the traffic light is obtained, and based on the information, a traffic jam reference value for a section between adjacent traffic signals included in the same offset area Correct. And about the driving | running | working information corresponding between the mutually adjacent traffic signals included in the same offset area | region, the traffic congestion degree between the traffic signals which the vehicle passed based on the traffic congestion determination value is determined. Therefore, since the traffic jam determination is performed in consideration of the setting state of the offset with respect to the lighting state of the traffic light, the reliability of the traffic jam determination can be improved.

  According to the second aspect of the invention, the information related to the offset area is associated with the offset area and the weight information for the traveling direction in the offset area. Further, for traffic signals adjacent to each other included in the same offset area, the traffic jam reference value is corrected for each traveling direction based on the weight information, and a traffic jam determination value for each traveling direction is set. For this reason, since the weight information according to the traveling direction in the offset region is reflected in the traffic jam determination, it is possible to deal with offset regions in which different offsets are set in each traveling direction. Therefore, the reliability of traffic jam determination can be improved.

  According to the third aspect of the present invention, travel information between traffic signals adjacent to each other through which the vehicle has passed is acquired, and a preset traffic congestion reference value is acquired. Moreover, the information regarding the offset area | region with which the weight information with respect to the advancing direction in the said offset area and the traveling direction in the said offset area was matched is acquired. Furthermore, for traffic lights that are adjacent to each other in the same offset area, a value obtained by correcting the traffic jam reference value based on the weight information for each traveling direction is set as a traffic jam judgment value. For traffic lights included in different offset areas, a value that is more difficult to determine traffic jam than the traffic jam reference value is set as a traffic jam judgment value. In addition, a traffic jam reference value is set as a traffic jam judgment value between traffic signals in which at least one of the adjacent traffic signals is not included in the offset area. Then, based on the travel information and the traffic congestion determination value, the traffic congestion degree between adjacent traffic signals that the vehicle has passed is determined. Therefore, since the traffic jam determination is performed in consideration of the setting state of the offset with respect to the lighting state of the traffic light, the reliability of the traffic jam determination can be improved.

According to the method of claim 4, travel information between traffic signals adjacent to each other through which the vehicle has passed is acquired, and a preset traffic congestion reference value is acquired. Further, information on an offset area indicating a traffic signal group that is offset with respect to the lighting state of the traffic light is obtained, and based on the information, a traffic jam reference value for a section between adjacent traffic signals included in the same offset area Correct. And about the driving | running | working information corresponding between the mutually adjacent traffic signals included in the same offset area | region, the traffic congestion degree between the traffic signals which the vehicle passed based on the traffic congestion determination value is determined. Therefore, since the traffic jam determination is performed in consideration of the setting state of the offset with respect to the lighting state of the traffic light, the reliability of the traffic jam determination can be improved.

  According to the fifth aspect of the present invention, according to the traffic information generation program, the travel information between traffic signals adjacent to each other through which the vehicle has passed is acquired, and a preset traffic congestion reference value is acquired. Further, information on an offset area indicating a traffic signal group that is offset with respect to the lighting state of the traffic light is obtained, and based on the information, a traffic jam reference value for a section between adjacent traffic signals included in the same offset area Correct. And about the driving | running | working information corresponding between the mutually adjacent traffic signals included in the same offset area | region, the traffic congestion degree between the traffic signals which the vehicle passed based on the traffic congestion determination value is determined. Therefore, since the traffic jam determination is performed in consideration of the setting state of the offset with respect to the lighting state of the traffic light, the reliability of the traffic jam determination can be improved.

  According to the method of the sixth aspect, the travel information between traffic signals adjacent to each other through which the vehicle has passed is acquired, and a preset traffic congestion reference value is acquired. Moreover, the information regarding the offset area | region with which the weight information with respect to the advancing direction in the said offset area and the traveling direction in the said offset area was matched is acquired. Furthermore, between traffic signals that are adjacent to each other in the same offset area, a value obtained by correcting the traffic congestion reference value based on the weight information is set as a traffic congestion determination value, and the adjacent traffic signals are set in different offset areas. A value that is less likely to be determined as a traffic jam than the traffic jam reference value is set as a traffic jam judgment value between the included traffic lights. In addition, a traffic jam reference value is set as a traffic jam judgment value between traffic signals in which at least one of the adjacent traffic signals is not included in the offset area. Then, based on the travel information and the traffic congestion determination value, the traffic congestion degree between adjacent traffic signals that the vehicle has passed is determined. Therefore, since the traffic jam determination is performed in consideration of the setting state of the offset with respect to the lighting state of the traffic light, the reliability of the traffic jam determination can be improved.

  According to the seventh aspect of the present invention, in accordance with the traffic information generation program, the travel information between traffic signals adjacent to each other through which the vehicle has passed is acquired, and a preset traffic congestion reference value is acquired. Moreover, the information regarding the offset area | region with which the weight information with respect to the advancing direction in the said offset area and the traveling direction in the said offset area was matched is acquired. Furthermore, between traffic signals that are adjacent to each other in the same offset area, a value obtained by correcting the traffic congestion reference value based on the weight information is set as a traffic congestion determination value, and the adjacent traffic signals are set in different offset areas. A value that is less likely to be determined as a traffic jam than the traffic jam reference value is set as a traffic jam judgment value between the included traffic lights. In addition, a traffic jam reference value is set as a traffic jam judgment value between traffic signals in which at least one of the adjacent traffic signals is not included in the offset area. Then, based on the travel information and the traffic congestion determination value, the traffic congestion degree between adjacent traffic signals that the vehicle has passed is determined. Therefore, since the traffic jam determination is performed in consideration of the setting state of the offset with respect to the lighting state of the traffic light, the reliability of the traffic jam determination can be improved.

  Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. FIG. 1 is a block diagram of the statistical system 1. The statistical system 1 includes an in-vehicle system 2 as a traffic information generation system mounted on each vehicle and a statistical server 5.

  The in-vehicle system 2 includes a control device 10, a communication module 11, a position detection sensor 12, a geographic information storage unit 13, a traffic jam reference database (DB) 14, and a travel information storage unit 15.

  The control device 10 includes a CPU, a RAM, a ROM, and the like, stores a traffic information generation program, and constitutes a travel information acquisition unit, a reference value acquisition unit, an information acquisition unit, a determination value setting unit, a traffic jam determination unit, and a control unit. . In addition, the control device 10 calculates the vehicle position based on the position detection sensor 12. The position detection sensor 12 includes a GPS receiver 12A, a vehicle speed sensor 12B, a gyro 12C, and the like.

  Moreover, the control apparatus 10 is connected to the statistics server 5 through the communication module 11 so that data can be transmitted and received. The communication module 11 may be a communication interface or a mobile phone.

  The geographic information storage unit 13 stores road data 18 and map drawing data 19. The road data 18 includes node data, link data, traffic signal data, and the like. The node data is data related to a node indicating an intersection, an interchange, a road end point, and the like, and has a node ID (identifier), coordinates, and a link ID (connection link ID) connected to the node. The link data is data relating to a link, which is a data element that connects each node, and has a link ID (identifier), coordinates, and IDs of nodes connected to both ends of the link (end-node IDs). In the traffic signal data, each traffic signal ID (identifier) is associated with a node ID corresponding to the position where the traffic signal exists.

  The map drawing data 19 has data for displaying a map screen. Further, road drawing data indicating the road shape, the number of lanes, the traveling direction of the lanes, and the like is associated with the link ID of the link indicating the road. The control device 10 compares the host vehicle position with the road data, and performs map matching for mapping the host vehicle position to a position on the road.

  Further, the traffic jam standard database (DB) 14 stores traffic jam standard data 20. The traffic congestion reference data 20 stores a traffic congestion reference value set in advance, and the traffic congestion reference value is indicated by the vehicle speed in the present embodiment. The traffic jam reference value is a fixed value that is uniformly set, such as “20 km / h”, or a fixed value that is set according to the prescribed speed of each road. When the traffic jam determination is performed using the traffic jam reference value, for example, when the actual vehicle speed is equal to or lower than the traffic jam reference value, it is determined that the traffic jam has occurred. In this embodiment, “traffic jam” and “empty” are set as the degree of traffic jam, but it may be set at three or more stages such as “traffic jam”, “crowded”, and “vacant”. In this case, a plurality of parameters such as “5 km / h” for “congestion” and “10 km / h” for “congestion” are stored in the traffic jam reference value.

  The travel information storage unit 15 stores travel data 21 that indicates the travel status between adjacent traffic signals that the host vehicle has passed. As shown in FIG. 2A, the traveling data 21 is stored with time 21A, section 21B, traveling direction 21C, and vehicle speed 21D associated with each other. The time 21A indicates the time when the vehicle travels in the section 21B. A section 21B indicates a section between traffic lights on which the host vehicle has traveled. For example, as shown in FIG. 2B, when traveling in a section between traffic lights S1 and S2, data indicating the section is stored in section 21B, and traveling in the section at time 21A. The recorded time is stored. The traveling direction 21C is a traveling direction when traveling in the section, and is a direction such as “east direction”, a link up / down (traveling direction), an ingress node indicating a point entering the section, and a leaving point. It is represented by at least one of the leaving nodes shown. The vehicle speed 21D is an average speed or the like when traveling in the section. This travel data 21 is used to determine the degree of traffic jam between traffic lights.

As shown in FIG. 1, the statistical server 5 includes a CPU 30, a RAM 31, a ROM 32, a communication module 33, a probe database (DB) 34, a signal control system database (DB) 35, and a traffic jam database (DB) 36. The statistics server 5 is the communication module 3
3 is connected to the in-vehicle system 2 of each vehicle so that data can be transmitted and received.

  The probe database 34 stores probe data 40 collected from vehicles to be collected. The probe data 40 includes, for example, a stop position between traffic lights, a stop time, a vehicle speed between traffic lights, and the like.

  Control system data 41 is stored in the signal control system database 35. In the present embodiment, the control system data 41 is generated by, for example, statistics of the probe data 40 for the past several days or the past several hours, and is highly real-time data.

  As shown in FIG. 3, the control system data 41 indicates a traffic signal group that is offset with respect to the lighting state of the traffic signal, and is composed of a plurality of system unit data 41U. The system unit data 41U includes a time zone 41A, an offset area 41B, a traffic light 41C, and weight information 41D. The time zone 41A indicates a time zone divided every predetermined time, such as “7: 00 to 8:00”. The offset area 41B indicates a traffic signal group (offset subarea) that is offset with respect to the lighting state of the traffic light. The offset is a difference (shift) in blue display start time set for adjacent traffic lights, and is expressed in units of seconds. The offset area includes only traffic lights installed on the same road, and traffic lights on intersecting roads are not included in the same offset area. For example, as shown in FIG. 4A, the offset areas A <b> 1 to C <b> 1 are set along the same road 100 in the time zone “7:00 to 8:00”.

  For example, when the traveling direction is the east direction, as shown in FIG. 5, the second traffic light S2 starts to display blue with an offset ΔT1 such as 5 seconds with respect to the first traffic light S1 in the offset area A1. Has been. Further, the blue display is started with the offset ΔT2 such as 3 seconds for the third traffic light S3 with respect to the second traffic light S2. As a result, for a vehicle traveling within a predetermined speed range within the offset region, a time zone (through band) ΔT3 that can be passed in blue is widened, and the number of vehicles that pass continuously through traffic lights S1 to S3 is increased. It is possible to balance the number of vehicles entering and leaving the offset area A1.

  Further, when the traffic lights S1 to S3 are close to each other, an offset of “0 second” may be set for the traffic lights S1 to S3. Also in this case, the traffic lights S1 to S3 simultaneously start blue display, so that the vehicle can pass through the traffic lights S1 to S3 continuously within the blue display time.

  For system control in this offset area, there are a method of setting offsets equally for the upper and lower bidirectional lanes, and a priority offset method for preferentially controlling so that vehicles in one of the traveling directions do not stay. is there. For example, when there is a large amount of traffic in the east direction during a time zone such as “7:00 to 8:00”, an offset is set for widening the through band in the east traveling direction. When the offset setting is preferentially performed on one lane in this way, in the opposite lane in the west direction, the vehicle speed tends to be affected by the lighting state of the traffic light even in the offset region. In the present embodiment, a state in which an offset is preferentially set and a wide through band can be obtained is referred to as a forward offset, and a state in which signal waiting is likely to occur in the opposite lane due to the setting of the forward offset is referred to as a reverse offset.

  The offset area 41B of the control system data 41 is indicated by an identifier assigned to each offset area, or the signal or node ID or coordinates included in the offset area. A traffic signal 41C associated with the offset area 41B indicates a traffic signal group included in the offset area 41B.

As shown in FIG. 3, the weight information 41D of the control system data 41 is associated with the time zone 41A and the offset area 41B, and the congestion reference value for each traffic signal for each of the traveling directions 41E and 41F in the offset area 41B. A correction factor is set.

  In the offset region A1 shown in FIG. 4A, the forward direction is set equally in both the “east” and “west” directions 41E and 41F, but the through band is set narrower than the priority offset method. ing. Accordingly, a section having the traffic signal S1 included in the offset area A1 as a start point and a traffic signal S2 as an end point, a section having the traffic signal S2 as a start point and the traffic signal S3 as an end point, a section having the traffic signal S3 as a start point and the traffic signal S2 as an end point, a traffic signal Weight information 41D such as “1.2” is set for the section having S2 as the start point and traffic light S1 as the end point. The weight information 41D is used to calculate a traffic jam determination value together with the traffic jam reference value of the traffic jam standard data 20 described above. Specifically, the weight information 41D such as “1.2” is multiplied by the traffic jam reference value such as “10 km / h” to generate a traffic jam judgment value such as “12 km / h”. The traffic jam determination value for the area where the forward offset is set is a value that is more easily determined as traffic jam than the traffic jam reference value. The correction coefficient is set according to the length between the traffic lights, the road shape, the gradient, and the past correction history. For example, the value is different even in each offset area where the forward offset is set. There is a case.

  In the offset region B1 shown in FIG. 4A, the priority offset method is set in the traveling direction “east”. For this reason, for example, “1.8” for a section having the traffic light S4 as the start point and the traffic light S5 as the end point, a section having the traffic light S5 as the start point and the traffic light S6 as the end point, and a section having the traffic light S6 as the start point and the traffic light S7 as the end point. The value is set. Accordingly, since the traffic jam judgment value for these sections is “18 km / h”, it becomes a value that is more easily judged as traffic jam than the traffic jam reference value, and the speed of the vehicle traveling in these sections is “18 km / h” or less. Until it becomes, it is not judged as traffic jam.

  On the other hand, in the traveling direction of “west” in the offset region B1, the section having the traffic light S7 as the starting point and the traffic light S6 as the end point, the section having the traffic light S6 as the starting point and the traffic light S5 as the end point, and the traffic light S5 as the starting point is the traffic light S4. For example, a value such as “0.6” is set for the end point section. Accordingly, since the traffic jam judgment value for these sections is “6 km / h”, it is a value that is less likely to be judged as traffic jam than the traffic jam reference value, and the speed of the vehicle traveling in these sections is “6 km / h” or less. It will be judged as traffic jam.

  Further, as shown in FIG. 4 (a), between the traffic signals adjacent to each other among the traffic signals adjacent to each other, the section having the traffic signal S7 as the start point and the traffic signal S8 as the end point, and the traffic signal S8 as the start point, the traffic signal S9. There is a section with the traffic signal S9 as the starting point, a section with the traffic light S8 as the end point, and a section with the traffic light S8 as the start point and the traffic light S7 as the end point. For these sections, since the control for interlocking the lighting state of adjacent traffic lights is not performed, a traffic jam reference value such as “10 km / h” is used as the traffic jam judgment value. In these sections, it is determined that there is a traffic jam when the vehicle speed is equal to or lower than “10 km / h”.

  Further, as shown in FIG. 4 (a), there are sections having a boundary between different offset areas, a section having a traffic light S3 as a starting point and a traffic light S4 as an end point, and a section having a traffic light S4 as a starting point and a traffic light S3 as an end point. In this section, the speed is likely to be affected by the lighting state of the traffic light. For this reason, a value obtained by multiplying the traffic jam reference value by a predetermined correction coefficient (such as “0.8”) is used as the traffic jam judgment value for this section. Accordingly, in these sections, a value that is less likely to be determined as a traffic jam than the traffic jam reference value is used, and a traffic jam is determined when the vehicle speed is equal to or lower than “0.8 km / h”.

The offset area may be changed according to the time zone. For example, in a time zone 41A such as “7: 00 to 8:00”, as shown in FIG. 4A, an offset area A1 including traffic lights S1 to S3, an offset area B1 including traffic lights S4 to S7, and a traffic light The offset area C1 including S9 to S11 is set, but in the time zone 41A such as “8:00 to 9:00”, as shown in FIG. 4B, the offset area A1 including the traffic lights S1 to S3. And an offset area B2 including the traffic lights S4 to S8 and an offset area C2 including the traffic lights S10 to S12 are set. That is, the offset region B1 shown in FIG. 4A newly includes the traffic signal S8, and the offset region C1 includes the traffic signal S12 and excludes the traffic signal S9.

For this reason, the weight information 41D of the control system data 41 is set according to not only the offset region 41B but also the time zone 41A.
The statistics server 5 transmits the control system data 41 when a data request is received from the in-vehicle system 2. The in-vehicle system 2 extracts from the control system data 41, the system unit data 41U corresponding to each traffic signal located at both ends between the traffic signals that have passed and the time zone through which the traffic signal passed. Then, the traffic jam reference value is corrected using the weight information 41D of the extracted system unit data 41U to obtain a traffic jam judgment value. Then, the traffic jam judgment is performed using the traffic jam judgment value, and traffic jam data 42 as traffic information is generated.

  The traffic jam data 42 is stored in the traffic jam database 36. The traffic jam data 42 is data transmitted from the in-vehicle system 2 and includes the traffic signal, the time zone, the traffic jam degree, and the like on which the traffic jam is determined. The CPU 30 of the statistics server 5 generates traffic information using the traffic jam data 42.

Next, the processing procedure of this embodiment will be described with reference to FIG. FIG. 6 is a flowchart showing a processing procedure for the in-vehicle system 2 to create the traffic jam data 42.
The control device 10 waits for the ACC switch to be turned on based on the signal input from the ignition switch IG (see FIG. 1), and creates the traffic jam data 42 when the ACC switch is turned on. This process is repeated until the ACC switch is turned off.

  When the ACC switch is turned on, as shown in FIG. 6, the control device 10 acquires the host vehicle position, compares the host vehicle position with the traffic signal data, and whether the host vehicle passes the traffic signal. It is determined whether or not (step S1). When turning right or left at the intersection, it is not determined that the vehicle has passed the traffic light (NO in step S1), and the vehicle waits for the vehicle to go straight through the traffic light.

  For example, as shown in FIG. 7, when the host vehicle V1 passes through the traffic light S2 by going straight through an intersection (YES in step S1), the distance between the traffic lights with the traffic light passing at that time as the end point is specified (step S2). . That is, the section having the traffic light S2 determined to have passed in step S1 as the end point and the traffic light S1 passed before as the start point is specified as the distance between the traffic lights through which the host vehicle V1 has passed. Further, when the traffic signals are identified, the IDs of the traffic signals located at both ends between the traffic signals are acquired.

  When the distance between the traffic lights is specified, the travel data 21 between the traffic lights specified in step 2 is stored (step S3). Specifically, the control device 10 acquires time from a timer (not shown) and acquires the traveling direction of the host vehicle V1 based on the road data 18. Further, the vehicle speed is acquired from the vehicle speed sensor 12B, the time 21A such as “7:15”, the section 21B such as “signal S1 to signal S2”, the traveling direction such as “west → east”, “18 km / h”, etc. Travel data 21 consisting of the following vehicle speed 21D is generated. A section 21B indicates the distance between the traffic lights identified in step S2. Then, the generated travel data 21 is stored in the travel information storage unit 15.

Further, the control device 10 acquires a traffic jam reference value from the traffic jam reference data 20 (step S4).
). In addition, after step S4, it may be performed at almost the same timing as the timing of passing the traffic light, or may be performed every predetermined time.

  When the traffic congestion reference value is acquired, the control device 10 determines whether there is control system data 41 corresponding to the traffic signals at both ends between the identified traffic signals (step S5). If the signal S2 has passed, it is determined whether there is control system data 41 corresponding to the signal S2 that has passed at that time and the signal S1 that has passed before. For example, the control system data 41 around the vehicle position is acquired from the statistics server 5 every predetermined time, and it is determined whether or not there is system unit data 41U corresponding to the traffic lights at both ends in the acquired data. May be. Alternatively, the control device 10 designates the traffic lights at both ends, the own vehicle position, or the road name with the own vehicle position, etc., makes a data request to the statistical server 5, and based on the response of the statistical server 5 to the data request, The presence / absence of control system data 41 in the vicinity of the vehicle position may be determined.

  For example, like the traffic light S8 shown in FIG. 4A, at least one of the traffic lights at both ends between the traffic lights is a traffic light that is not included in the offset region, and the acquired control system data 41 includes the traffic light S8. If there is no system unit data 41U corresponding to, it is determined that there is no control system data 41 corresponding to the traffic lights at both ends (NO in step S5), and the process proceeds to step S6. Alternatively, when a response indicating that there is no system unit data 41U corresponding to at least one of the traffic signals at both ends is received from the statistical server 5, it is determined that there is no control system data 41 corresponding to the traffic signals at both ends (NO in step S5). Proceed to step S6. In step S6, the traffic jam reference value such as “10 km / h” acquired in step S4 is set as the traffic jam judgment value, and the process proceeds to step S10.

  On the other hand, if it is determined that there is control system data 41 corresponding to the traffic signals at both ends between the traffic signals (YES in step S5), whether the traffic signals at both ends are included in the same offset region based on the control system data 41 It is determined whether or not (step S7). For example, it is determined whether or not the IDs of the traffic signals at both ends are included in the traffic signal 41C of the control system data 41.

  For example, when the traffic lights S3 and S4 are included in different offset areas B1 and C1 as in the traffic lights S3 and S4 shown in FIG. 4A, it is determined that the traffic lights at both ends are not included in the same offset area. (NO in step S7), the traffic jam reference value is corrected with a predetermined correction coefficient as described above (step S8). That is, when the traffic lights at both ends are not included in the same offset region, a vehicle train that is temporarily generated by waiting for a signal but is eliminated when the signal changes to blue display is likely to occur. Since these traffic signals are not offset, in the control system data 41, the weight information 41D is not set for the traffic signals. For this reason, a predetermined correction coefficient (for example, “0.8”) that lowers the traffic jam reference value is multiplied by the traffic jam reference value acquired in step S4 to generate a traffic jam determination value that is difficult to determine as traffic jam.

  If it is determined in step S7 that the traffic signals at both ends are included in the same offset area (YES in step S7), the traffic signals at both ends are offset, and the control system data 41 includes Corresponding weight information 41D is stored. Therefore, the control device 10 corrects the traffic jam reference value based on the weight information 41D (step S9). Specifically, the weight information 41D of the system unit data 41U corresponding to the time zone that corresponds between the traffic signals that have passed and that has the same traveling direction and that has passed the traffic signal is extracted. Then, the traffic jam judgment value is calculated by multiplying the traffic jam reference value by the weight information 41D corresponding to the traveling direction. For example, when the traffic lights at both ends between the traffic lights are the traffic lights S1 and S2 and the traveling direction 41F in the “east”, the weight information 41D is “1.2”, so the traffic jam reference value is “10 km / In the case of “h”, the traffic jam judgment value is “12 km / h”.

  When the traffic jam determination value is set in this way, in step S10, the control device 10 performs traffic jam determination using the set traffic jam determination value. Specifically, the traveling data 21 corresponding to the traffic lights identified in step 2 is compared with the set traffic jam judgment value. At this time, when the vehicle speed 21D becomes equal to or less than the traffic congestion determination value, the section may be determined to be a traffic congestion section. As described above, the vehicle speed 21D between traffic lights is equal to or less than the traffic congestion determination value. It may be determined whether the time is equal to or longer than a predetermined time.

  For example, when the traffic jam judgment value between the traffic lights S1 and S2 is “12 km / h”, the vehicle speed 21D (“18 km / h”) included in the travel data 21 exceeds the traffic jam judgment value. It is determined that the interval is “vacant”. Furthermore, when it is determined whether or not the time when the traffic congestion determination is less than or equal to the traffic congestion determination value is a predetermined time or more, the predetermined time may be set to a relatively short time such as “40 seconds”. . For this reason, when a forward train or a prioritized offset is set and a vehicle train is generated in the section even though the train is not easily generated, the train is generated by the red display of the traffic light S2. Instead, it is estimated that there is a high possibility that the train is caused by other sudden factors such as a broken vehicle, an accident, or construction. In this case, since the generated train is immediately determined to be congested, it is possible to quickly notify the statistics server 5 of the congested section.

  For example, when the traffic congestion judgment value between the traffic lights S3 and S4 is “8 km / h”, the vehicle speed 21D (“7 km / h”) included in the travel data 21 is equal to or less than the traffic jam judgment value. It is determined that there is a “traffic jam” between the traffic lights. Furthermore, when determining whether or not the time when the traffic congestion determination value is equal to or less than the traffic congestion determination time is equal to or longer than the predetermined time, the predetermined time may be set to a relatively long time such as “100 seconds”. Good. For this reason, even if a vehicle train temporarily occurs due to a signal waiting in this section, it is relatively difficult to determine as a traffic jam. Then, for example, when the signal wait state is repeated twice, it can be accurately determined as a traffic jam.

  When the traffic jam is determined, the control device 10 generates the traffic jam data 42 and transmits the generated traffic jam data 42 to the statistical server 5 (step S11). The statistical server 5 accumulates the received traffic jam data 42 in the traffic jam database 36.

  When the traffic jam data 42 is transmitted, the control device 10 determines whether or not the ACC switch is turned off based on a signal input from the ignition switch IG. If it is determined that the ACC switch is not turned off, the process returns to step S1 and the above-described processing is repeated.

  As a result, the travel data 21 is accumulated every time the vehicle passes between traffic lights. Further, the traffic congestion determination value corresponding to the offset area is repeatedly performed by comparing the traffic congestion determination value corresponding to the traveled traffic signal with the travel data 21. In addition to determining whether or not there is an offset area, in order to set a congestion determination value according to the boundary of the offset area or between different offset areas, the congestion determination according to the offset setting status is performed. be able to. For this reason, instead of a train that temporarily occurs due to a red light, for example, a train that has occurred due to an accidental factor such as an accident, or a train that has been caused by a vehicle that greatly exceeds the traffic capacity flowing into the bottleneck, etc. It can be accurately determined as a traffic jam line.

  The statistical server 5 further performs statistical processing using the acquired traffic jam data 42, discriminates the traffic jam section, and generates road traffic information indicating the traffic jam section. At this time, since the traffic jam data 42 reflecting the setting state of the offset area is used, the road traffic information generated by the statistical server 5 is also highly reliable information.

  In addition, after setting the weight information 41D, the statistical server 5 refers to the stop position, the stop time, and the like included in the probe data 40 transmitted from the vehicle that performed the traffic jam determination using the weight information 41D, and determines the traffic jam. The validity of the value may be judged. When the traffic data 42 is detected based on the probe data 40 in a situation where the traffic jam is resolved immediately or the vehicle train has been generated for a long time in a section that is not determined to be a traffic jam, even though it is determined as traffic jam. Alternatively, the weight information 41D may be feedback corrected. In this case, since the feedback-corrected weight information 41D can be used in the in-vehicle system 2, it is possible to perform a congestion determination with higher reliability.

According to the above embodiment, the following effects can be obtained.
(1) In the said embodiment, the control apparatus 10 of the vehicle-mounted system 2 acquires the driving | running | working data 21 between the mutually adjacent traffic signals which the own vehicle V1 passed. In addition, a preset traffic standard value is acquired from the traffic standard data 20. Further, control system data 41 regarding the offset region is acquired from the statistics server 5. Further, the control device 10 corrects the traffic jam reference value between adjacent traffic signals included in the same offset area based on the control system data 41, and sets it as a traffic jam judgment value. Furthermore, for the travel data 21 corresponding to traffic signals adjacent to each other included in the same offset region, the degree of traffic congestion between traffic signals that the host vehicle V1 has passed is determined based on the traffic congestion determination value. Therefore, in order to reflect the setting status of the offset area in traffic jam judgment, traffic jams occur between sections where trains that occur temporarily due to signal waiting etc. frequently occur and sections where trains are less likely to occur when offset is set. Differences in determination can be suppressed. For this reason, the reliability of the congestion data 42 generated by the in-vehicle system 2 can be improved.

  (2) In the above embodiment, the control system data 41 is associated with the offset area and the weight information 41D for the traveling direction in the offset area. Further, based on the weight information 41D, the traffic jam reference value is corrected for each traveling direction between traffic signals adjacent to each other included in the same offset region, and set as a traffic congestion determination value for each traveling direction. Therefore, since the forward offset and the reverse offset in the offset area can be reflected in the traffic jam determination, the reliability of the traffic jam determination can be improved.

In addition, you may change the said embodiment as follows.
-In the said embodiment, although the traffic congestion reference value was made into the vehicle speed, you may make it the length of a vehicle train. In this case, the in-vehicle system 2 calculates the length from the position where the host vehicle is below 10 km / h to the traffic signal based on the traffic signal data, and calculates the length as the length of the train. Then, the traffic congestion reference value such as “50 m” is compared with the calculated vehicle train length and the like, and when the vehicle train length becomes equal to or less than the traffic congestion reference value, the traffic congestion degree in that section is increased.

  In the above embodiment, the control system data 41 is data generated by statistics of the probe data 40. However, other data such as data acquired from a sensor or the like that is installed on the roadside and detects traffic conditions is used. You may generate based on.

  In the above embodiment, the in-vehicle system 2 stores the traffic congestion reference data 20 having the traffic congestion reference value that is uniformly set, but the traffic congestion reference value that has been changed in advance according to the setting status of the offset is used. Also good.

  In the above embodiment, the weight information 41D is a correction coefficient that is multiplied by the traffic jam reference value, but may be a correction amount that is added to or subtracted from the traffic jam reference value. Alternatively, the weight information 41D itself may be a traffic jam determination value set according to the offset setting status.

In the above embodiment, the traffic jam determination value is a value obtained by multiplying the traffic jam reference value by a predetermined correction coefficient for the traffic signals located at both ends of the traffic signals S3 and S4 included in different offset areas. (For example, “8 km / h”) may be set in advance, and the determination value may be used as the traffic congestion determination value.

  In the above embodiment, when the traffic light S8 that is not included in any offset area is positioned at one end between the traffic lights identified in step S2, the traffic jam reference value is used as the traffic jam judgment value between the traffic lights. However, a value obtained by multiplying the traffic jam reference value by a predetermined correction coefficient (for example, “0.8”) may be used as the traffic jam judgment value. Alternatively, a predetermined determination value (for example, “8 km / h”) may be set in advance, and the determination value may be used as a traffic jam determination value.

  -In the above embodiment, the traffic signal passing through is identified at the timing when the host vehicle passes the traffic signal, and the traffic jam determination corresponding to the traffic signal is performed. However, the traffic jam determination timing may be any other timing. . For example, when the ACC switch is turned off, the congestion determination may be performed on the travel route from when the ACC switch is turned on to when the ACC switch is turned off. In this case, the control system data 41 for the travel route is acquired, and the traffic jam is determined. Alternatively, the traffic jam determination may be performed for the route traveled during the predetermined time ΔT every predetermined time ΔT.

  In the above embodiment, the in-vehicle system 2 determines the degree of congestion, but the statistics server 5 may determine it. In this case, the in-vehicle system 2 accumulates the travel data 21 and sequentially transmits the travel data 21 to the statistics server 5. The statistical server 5 compares the acquired travel data 21 with the control system data 41 to determine the degree of traffic congestion. In this case, the CPU 30, RAM 31 and ROM 32 of the statistical server 5 constitute a travel information acquisition unit, an information acquisition unit, a reference value acquisition unit, a determination value setting unit, a determination value generation unit, a traffic jam determination unit, and a control unit.

A block diagram of a statistical system. (A) is a conceptual diagram of travel data, (b) is a schematic diagram of an installation section of a traffic light. The conceptual diagram of control system data. (A) is a conceptual diagram of an offset area | region, (b) is a conceptual diagram of the offset area | region in a different time slot | zone. The conceptual diagram which shows each lighting timing of the traffic signal to which the offset was set. The flowchart which shows the process sequence at the time of producing | generating traffic jam data. The schematic diagram for demonstrating the said process sequence.

Explanation of symbols

  2 ... In-vehicle system as a traffic information generation system, 5 ... Travel information acquisition means, information acquisition means, reference value acquisition means, determination value setting means, traffic congestion determination means, and statistical server as control means, 10 ... travel information acquisition means, Information acquisition means, reference value acquisition means, determination value setting means, control device as traffic congestion determination means and control means, 14 ... signal control system database, 15 ... travel information storage unit, 20 ... traffic jam reference data including traffic jam reference value, 21... Travel data as travel information, 41... Control system data as information related to the offset area, 41E, 41F... Traveling direction, 41D... Weight information, 100 ... road, A1 to C1, B2, C2. S12 ... Traffic light.

Claims (7)

Driving information acquisition means for acquiring driving information between adjacent traffic signals that the vehicle has passed;
A reference value acquisition means for acquiring a preset traffic congestion reference value;
Information acquisition means for acquiring information on an offset region indicating a traffic signal group that is offset with respect to a lighting state of the traffic light;
Based on the information about the offset area, a determination value setting unit that corrects the traffic jam reference value for traffic signals adjacent to each other included in the same offset area, and sets as a traffic jam judgment value;
Concerning the traveling information corresponding to traffic signals adjacent to each other included in the same offset area, the traffic information includes a traffic jam judging means for judging a traffic jam level between traffic signals passed by the vehicle based on the traffic jam judgment value. A featured traffic information generation system. The information related to the offset area is information in which the offset area and weight information for the traveling direction in the offset area are associated with each other.
The determination value setting means includes:
The traffic congestion reference value is corrected for each traveling direction and set as a traffic congestion determination value for each traveling direction between adjacent traffic signals included in the same offset region based on the weight information. The traffic information generation system according to 1. Driving information acquisition means for acquiring driving information between adjacent traffic signals that the vehicle has passed;
A reference value acquisition means for acquiring a preset traffic congestion reference value;
Information acquisition means for acquiring information related to an offset area in which an offset area indicating a traffic signal group that is offset with respect to a lighting state of the traffic light and weight information for a traveling direction in the offset area are associated with each other;
For traffic signals adjacent to each other included in the same offset region, a value obtained by correcting the traffic jam reference value for each traveling direction based on the weight information is set as a traffic jam determination value, and each traffic signal is included in a different offset region. A value that is less likely to be determined as a traffic jam than the traffic jam reference value is set as a traffic jam judgment value between adjacent traffic signals, and the traffic jam reference value is set between traffic signals where at least one of the adjacent traffic signals is not included in the offset area. Determination value setting means for setting as a traffic congestion determination value;
A traffic information generating system comprising: a traffic jam judging unit for judging a traffic jam degree between adjacent traffic signals that the vehicle has passed based on the travel information and the traffic jam judgment value. In a traffic information generation method using a control means for determining traffic jam,
The control means is
Obtain travel information between adjacent traffic signals that the vehicle has passed,
Get a preset traffic standard value,
Obtain information about the offset area indicating the traffic signal group that is offset with respect to the lighting state of the traffic light,
Based on the information about the offset area, correct the traffic jam reference value between adjacent traffic signals included in the same offset area, set as a traffic jam judgment value,
For travel information corresponding to traffic signals adjacent to each other included in the same offset area, a traffic information generation method, wherein a traffic congestion degree between traffic signals that the vehicle has passed is determined based on the traffic congestion determination value. . In a traffic information generation program using a control means for determining traffic jam,
The control means;
Driving information acquisition means for acquiring driving information between adjacent traffic signals that the vehicle has passed;
A reference value acquisition means for acquiring a preset traffic congestion reference value;
Information acquisition means for acquiring information on an offset region indicating a traffic signal group that is offset with respect to a lighting state of the traffic light;
Based on the information about the offset area, a determination value setting unit that corrects the traffic jam reference value for traffic signals adjacent to each other included in the same offset area, and sets as a traffic jam judgment value;
The travel information corresponding to traffic signals adjacent to each other included in the same offset area is caused to function as a traffic jam determination unit that determines a traffic jam level between traffic signals passed by the vehicle based on the traffic jam determination value. Traffic information generation program. In a traffic information generation method using a control means for determining traffic jam,
The control means is
Obtain travel information between adjacent traffic signals that the vehicle has passed,
Get a preset traffic standard value,
Obtain information about the offset area in which the offset area indicating the traffic signal group that is offset with respect to the lighting state of the traffic light and the weight information for the traveling direction in the offset area are associated with each other,
A value obtained by correcting the traffic jam reference value for each traveling direction based on the weight information, with respect to between adjacent traffic signals that are included in the same offset region, between adjacent traffic signals that are included in the offset region. Is set as a traffic jam judgment value, and between traffic signals adjacent to each other included in different offset areas, a value that is more difficult to judge as traffic jam than the traffic jam reference value is set as a traffic jam judgment value, and at least of traffic lights adjacent to each other For traffic lights that are not included in the offset area, set the traffic jam reference value as a traffic jam judgment value,
A traffic information generation method, comprising: determining a degree of congestion between adjacent traffic signals that the vehicle has passed based on the travel information and the congestion determination value. In a traffic information generation program using a control means for determining traffic jam,
The control means;
Driving information acquisition means for acquiring driving information between adjacent traffic signals that the vehicle has passed;
A reference value acquisition means for acquiring a preset traffic congestion reference value;
Information acquisition means for acquiring information related to an offset area in which an offset area indicating a traffic signal group that is offset with respect to a lighting state of the traffic light and weight information for a traveling direction in the offset area are associated with each other;
A value obtained by correcting the traffic jam reference value for each traveling direction based on the weight information, with respect to between adjacent traffic signals that are included in the same offset region, between adjacent traffic signals that are included in the offset region. Is set as a traffic jam judgment value, and between traffic signals adjacent to each other included in different offset areas, a value that is more difficult to judge as traffic jam than the traffic jam reference value is set as a traffic jam judgment value, and at least of traffic lights adjacent to each other A determination value setting means for setting the traffic jam reference value as a traffic jam judgment value for traffic lights that are not included in the offset area,
A traffic information generating program that functions as a traffic jam judging unit that judges a traffic jam degree between adjacent traffic signals that the vehicle has passed based on the travel information and the traffic jam judgment value.

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