JP5395655B2 - Road driving information provision system - Google Patents

Description

  The present invention relates to a system for grasping a road traffic situation at a control center based on information obtained from a roadside on a toll road and creating / providing information for use in driving by a driver.

  Conventionally, as information provision on road traffic conditions on toll roads, generally, variable data boards on the road side display numerical data such as travel time and traffic conditions, schematic diagram data, and the like. In particular, information relating to traffic jams and information relating to travel time are regarded as important, and provision by a variable information board, car navigation, VICS (for example, see Non-Patent Document 1) and the like are also performed.

  However, these pieces of information are considered to be provided mainly for individual drivers to perform good driving in the sense of the driver, and the correspondence is implemented by the sense and judgment of each individual driver. In other words, rather than aiming to improve the overall road traffic situation, it was aimed at improving the driving of individual drivers.

  On the other hand, in order to improve traffic conditions, it is considered more efficient to make improvements aimed at improving the traffic conditions of the entire road. However, the situation is difficult because the provided information cannot grasp in advance the influence on the overall road traffic situation.

  On the other hand, when road traffic is viewed macroscopically, it is generally said that there is a relationship of “traffic volume = density × average speed” (for example, see Non-Patent Document 2). Therefore, it is considered effective to improve the average speed in the case of the same density in order to improve the traffic situation of the entire road. In addition to improving traffic conditions, it is considered that smooth flow with less variation in the speed of vehicles traveling on the road is less accelerating / decelerating, and road traffic conditions are also improved in terms of safety.

  At present, there is a warning display (for example, see Non-Patent Document 3) that avoids speed reduction due to sag to prevent traffic congestion on sag on slopes, but the average speed can be improved by providing information, There was no system that would reduce the speed variation. There are patent proposals relating to vehicle speed monitoring (see, for example, Patent Document 1) and patent proposals relating to provision of speed limit information according to the position of a deceleration factor (for example, see Patent Document 2). In the latter case, the timing for providing the speed limit information is changed due to a partial factor such as a deceleration factor. None of them are intended to improve the road traffic situation in the region of several kilometers to several tens of kilometers.

JP 2003-346283 A Japanese Patent No. 40233383

Edited and published by the Road Traffic Information and Communication System Center "VICS Challenge" Koshimasa Kei, “Traffic Engineering Introduction” p.107, Technical Shoin, 1989 Proceedings of the 23rd Traffic Engineering Research Conference (p.205-208) "Traffic Countermeasures Utilizing LED Display Board" (Traffic Engineering Society), 2006

  As described above, in the provision of road traffic information to the conventional driver, there is a lot of provision of information on the driving situation improvement of each driver, and the road traffic situation (traffic flow rate and safety) in the region of several km to several tens km. There was no such thing as an improvement.

  An object of the present invention is to provide a road driving information providing system for providing information aimed at improving road traffic conditions (traffic flow rate and safety) in an area of several kilometers to several tens of kilometers along with improvement of driver driving conditions. It is to provide.

The road driving information providing system according to the present invention accumulates roadside data including average speed, traffic volume, and density of vehicles in each section of the road in the roadside data DB based on vehicle running state information input from the roadside. Roadside data management means for reading out and using the past data accumulated in the roadside data DB, roadside data analysis means for obtaining the average speed at each density for each section and the difference between the average speeds of each section Based on the current information input from the roadside from the past data analyzed by the roadside data analysis means, a difference in average speed between adjacent sections is set in advance at a density similar to the current density. were rather less than the value, the teeth be a recommended speed generating means for generating a faster recommended speed, provides information that provides recommended speed created by the advisory speed creating unit to the roadside Characterized in that a signal means.

  In the present invention, the recommended speed creating means may perform a micro traffic flow simulation when creating the recommended speed and create the recommended speed based on the result.

  Further, in the present invention, the vehicle running state information input from the road side to the roadside data management means is data detected by a vehicle detector installed on the roadside, and the traffic volume and average speed at the installation location. Further, it may be configured such that data regarding density can be acquired.

  Further, in the present invention, the vehicle traveling state information input from the road side to the roadside data management means is data from a probe vehicle traveling on the road, and the passing point passing time of each vehicle as probe information, It is good also as a structure which can acquire the data regarding speed.

  In the present invention, the recommended speed created by the recommended speed creating means may be configured to have a created recommended speed evaluating means for predicting and evaluating the road traffic situation when the recommended speed is provided to the driver by road traffic simulation.

  Further, in the present invention, there is a recommended speed reflection degree evaluation means for evaluating a recommended speed reflection degree of the driver based on the probe information, and the recommended speed reflection degree evaluation means for the recommended speed created by the recommended speed creation means. A configuration may be provided that includes a recommended creation speed evaluation unit that predicts and evaluates the road traffic situation when the recommended speed is provided to the driver by road traffic simulation using the degree of reflection evaluated by the above.

  Further, in the present invention, when the recommended recommended speed evaluation means predicts and evaluates the road traffic situation when the recommended speed is provided to the driver by the road traffic simulation, the current traffic condition is maintained, reduced from the current level, A configuration may be used in which prediction and evaluation are performed for three cases that are increased from the current level.

  Moreover, in this invention, you may use DSRC communication as a roadside infrastructure which provides the information transmitted from the said provision information transmission means to the roadside which provides the onboard equipment of the vehicle which drive | works on a road.

  Furthermore, in the present invention, the provision information transmitting means may provide information to the roadside using broadcast broadcasting.

  The present invention improves the driving situation of the driver by using a technique for grasping the road traffic situation or a technique for preliminarily verifying the road traffic situation with a micro traffic flow simulator, and in an area of several kilometers to several tens of kilometers. Information can be provided to improve road traffic conditions (traffic flow rate and safety).

It is a whole block diagram of Example 1 of this invention. It is a whole block diagram of Example 2 of this invention. It is a whole block diagram of Example 3 of this invention. It is a conceptual diagram explaining an example of the recommended speed calculation in this invention.

  Hereinafter, an embodiment of a road driving information providing system according to the present invention will be described in detail for each example with reference to the drawings.

Example 1
In the first embodiment, as shown in FIG. 1, a control center 2 to which information detected by a roadside sensor 1 provided on a road (not shown) is input, and a predetermined calculation processing result executed by the control center 2 are obtained. The roadside infrastructure 10 to be output and the vehicle-mounted device 13 to which information from the roadside infrastructure is input. The control center 2 includes roadside data management means 3, roadside data DB (database) 4, roadside data analysis means 5, recommended speed creation means 6, recommended speed provision availability determination means 7, provision information creation means 8, provision information transmission means 9 Have Further, the roadside infrastructure 10 includes provision information creation means 11 and provision information transmission means 12. Furthermore, the vehicle-mounted device 13 includes provided information receiving means 14 and information providing means 15. Details of these will be described below.

  As the roadside sensor 1, it is conceivable to use a vehicle sensor installed on the roadside. When a vehicle sensor is used, information on traffic volume, average speed, and density (occupancy) can be obtained.

  The roadside data management means 3 of the control center 2 has a function of accumulating and reading information on the vehicle running state input from the roadside in the roadside data DB 4. Information stored in the roadside data DB 4 is roadside data including the average speed, traffic volume, and density of vehicles in each section of the road.

  The roadside data analysis means 5 analyzes past roadside data managed by the roadside data management means 3. As a method of analysis, we extract data for the case of similar density, compare the case where the continuous sections are traveling at the same average speed and the case where the continuous sections have different average speeds, and the traffic volume. Outputs the analysis result of how is changing. That is, using the past data accumulated in the roadside data DB, the average speed at each density for each section and the difference between the average speeds of each section are obtained. Then, for example, several recommended speed candidates having the same density in a plurality of consecutive sections and a small difference in average speed between the sections are prepared. In road traffic control systems, they are often managed in sections of several hundred meters to several kilometers. The analysis here may be also performed for each section. By analyzing these in several speed zones, it is possible to create analysis data that is the base for creating the recommended speed.

  The recommended speed creation means 6 creates a recommended speed based on the result analyzed by the roadside data analysis means 5 and the current road traffic situation data obtained by requesting the roadside data management means 3. The recommended speed is created based on the result of analysis by the roadside data analysis means 5, based on the average speed when the traffic volume is high at the same density and the difference in average speed between adjacent sections is severe. No speed (for example, set within ± 5 km / h or within 10 km / h according to road traffic conditions) is the recommended speed. That is, based on the current information input from the road side, a recommended speed candidate having a high average speed is created as a recommended speed among the recommended speed candidates described above at the same level as the current density. The recommended speed shall not exceed the speed limit.

  The recommended speed provision availability judging means 7 judges whether the recommended speed created by the recommended speed creating means 6 should be provided to the roadside. Here, the roadside data management means 3 obtains the current road traffic situation data, displays the current road traffic situation data and the recommended speed on a CRT, etc., and performs a confirmation work by the controller, which is provided by the controller. Determine whether or not. The result determined by the controller is input to the system by the HMI (keyboard, mouse or touch panel of the controller terminal).

  The provided information creation means 8 inputs the recommended speed determined to be provided by the recommended speed provision availability determination means 7 and creates recommended speed information in the format configuration of the provided information. The provided provision information (recommended speed) is concentric with the roadside by the provision information transmission means 9.

  The roadside infrastructure 10 receives the provision information (recommended speed) transmitted from the provision information transmission unit 9 and provides it to the driver in the provision information creation unit 11 according to the location where the roadside infrastructure 10 is installed. Create the information that should be provided. Specifically, only the recommended speed of the section where the roadside infrastructure 10 is installed is created as provision information, or when the number of roadside infrastructure 10 is small, the number of downstream sections is lower than the section where the roadside infrastructure is installed. The recommended speed is used as information to be provided.

  The recommended speed created in this way is provided to the vehicle traveling on the road by the provision information transmission processing means 12. As a communication means between the roadside infrastructure 10 and the vehicle, for example, DSRC communication is used. This DSRC communication is a communication method adopted in ETC. In other words, an ITS in-vehicle device that is an extension of the ETC in-vehicle device has been developed (see http://www.hino.or.jp/08its/gizi/onebol.html) and is planned to be used for road-to-vehicle communication. In this case, information corresponding to the section in which the roadside infrastructure 10 for DSRC communication is installed may be provided.

  In addition, broadcast broadcasting may be used as means for providing information to the roadside. In this case, it is necessary to provide a wide range of information covered by the broadcast station.

  Provided information receiving means 14 provided in the vehicle-mounted device 13 receives provided information (recommended speed) transmitted from the provided information transmission processing means 12 and transmits it to the information providing means 15. The information providing means 15 provides the driver with the provided information (recommended speed) obtained from the provided information receiving means 14. As a provision method to the driver, display on the vehicle-mounted device monitor or provision by sound can be used. Here, when providing recommended speed information, in the case of recommended speeds for multiple sections, a combination of the section position (area) and the recommended speed ("Recommended section speed ** [ km / h] ”).

  Next, the operation will be described. First, the results measured by the roadside sensor 1 are collected in the control center 2 by transmitting them to the roadside data management means 3 of the control center 2. The roadside data management means 3 of the control center 2 stores the result measured by the roadside sensor 1 in the roadside data DB 4. The roadside data DB 4 stores past roadside data, and the roadside data management means 3 reads out and provides the required data to the function that requests it from other functions.

  The roadside data analysis means 5 analyzes past roadside data managed by the roadside data management means 3 and can be recommended speed candidates corresponding to each situation, for example, as described above, in a plurality of consecutive sections. Several recommended speed candidates having the same density and a small difference in average speed between the sections are prepared.

Next, the recommended speed creation means 6 is most suitable for the situation based on the result analyzed by the roadside data analysis means 5 and the current road traffic situation data obtained by requesting the roadside data management means 3. Create the recommended speed. That is, based on the current information input from the roadside, the difference between the average speeds in the plurality of consecutive sections among the recommended speed candidates is about the same as the current density, and the average speed is less than a preset value. The recommended speed candidate having a high value is created as the recommended speed. By providing the recommended speed created in this manner to the driver, the average speed is almost the same in the adjacent sections. Therefore, the acceleration / deceleration of the traveling vehicle is reduced, and the average speed is improved. As described above, in the case of road traffic, it is considered that the relationship of “traffic volume = density × average speed” is generally established macroscopically. From this formula, if the average speed improves even at the same density, Traffic volume is expected to improve. These are created for all sections according to the current density of each section.

  In addition, it is determined whether the created recommended speed should be provided by the recommended speed provision availability determination means 7. When it is determined that the recommended speed is provided, the recommended speed and availability information are transmitted from the recommended speed provision availability determination means 7 to the provision information creation means 8. The provided information creating means 8 creates recommended speed information in the format of the provided information using the transmitted recommended speed. The provided provision information (recommended speed) is transmitted to the roadside infrastructure 10 by the provision information transmission means 9.

  In the roadside infrastructure 10, the provision information creation unit 11 creates provision information to be provided to the driver according to the location where the roadside infrastructure 10 is installed. The created recommended speed is provided to the vehicle traveling on the road by the provision information transmitting means 12.

  The provided information (recommended speed) transmitted from the provided information transmitting unit 12 is received by the provided information receiving unit 14 in the vehicle-mounted device 13 and transmitted to the information providing unit 15. The information providing means 15 provides the driver with the provided information (recommended speed) obtained from the provided information receiving means 14.

  With the above operation, it is possible to provide road driving information that provides the driver with a recommended speed according to the road traffic situation.

  In this way, by dynamically providing the recommended speed to the driver according to the road traffic situation, the road traffic situation becomes smoother and the average speed is improved to increase the traffic volume even at the same density. It is possible to improve the situation. In addition, smooth road traffic conditions due to the recommended speed will result in road traffic conditions with less acceleration / deceleration, and there may be an advantage that there are fewer accidents in terms of safety.

(Example 2)
Compared to the first embodiment shown in FIG. 1, the second embodiment has a recommended creation speed evaluation means 20 in the control center 2 as shown in FIG. Other configurations are the same as those of the first embodiment.

  The recommended creation speed evaluation means 20 uses the micro traffic flow simulator (for example, JP 2005-62944 A, JP 2007) as reference information for determining whether the generated recommended speed is information to be provided. This is created by using (Japanese Patent No. -287168). That is, the recommended creation speed evaluation means 20 first requests the roadside data management means 3 to obtain the current road traffic information. Next, according to the traffic information (density information) of the obtained road, using the recommended speed corresponding to this, the road traffic situation is simulated by the micro traffic flow simulation. When simulating, it is preferable to use information on future road traffic demand at the time of calculation. For example, there is a method of making evaluation information by performing simulation of three patterns of maintaining the current state, increasing from the current state, and decreasing from the current state. These pieces of information are created and used by the controller 7 when determining whether or not the controller can provide the recommended speed. Therefore, the recommended speed provision availability determination means 7 has a function of displaying the evaluation information created by the created recommended speed evaluation means 20 on the CRT or the like of the controller terminal. Others are the same as in the first embodiment.

  As described above, in the second embodiment, in addition to the first embodiment, the controller determines the provision of the recommended speed information using the road traffic simulation result when the recommended speed is reached. In addition, it is possible to determine whether the reliability is higher.

(Example 3)
In the third embodiment, as shown in FIG. 3, the recommended speed reflection degree evaluation means 21 is added to the control center 2 as compared to the second embodiment shown in FIG. An acquisition unit 16 and a vehicle acquisition information transmission unit 17 are added and used as a probe vehicle. Furthermore, a vehicle acquisition information receiving unit 18 and a vehicle acquisition information transmission unit 19 are added to the roadside infrastructure 10. Other configurations are the same as those of the second embodiment shown in FIG.

  In Example 3 configured in this manner, information obtained by the vehicle (the vehicle point passage time, speed, etc., these are referred to as probe information) can be obtained through road-to-vehicle communication through the vehicle-mounted device 13, This is used to calculate / evaluate whether the recommended speed is reflected in the road traffic situation. That is, the vehicle information acquisition means 16 first has a vehicle point passing time, speed, etc. (the vehicle-mounted device 13 has an information storage function such as a memory, HDD, etc. Vehicle information). The vehicle information acquired by the vehicle information acquisition unit 16 is transmitted to the roadside infrastructure 10 by the vehicle acquisition information transmission unit 17. Here, for the communication between the vehicle-mounted device 13 and the roadside infrastructure 10, the DSRC communication shown in the first embodiment can be used.

  The vehicle acquisition information transmitted in this way is received by the vehicle acquisition information receiving unit 18 of the roadside infrastructure 10 and transmitted to the roadside data management unit 3 by the vehicle acquisition information transmitting unit 19. The roadside data management means 3 stores and manages the acquired vehicle acquisition information in the roadside data DB 4 as roadside data.

  By using the vehicle acquisition information thus obtained, the recommended speed creation means 6 can perform more detailed analysis. The basic analysis method is the same as that of the first embodiment, but it is possible to acquire vehicle data in a certain section, so that it is possible to grasp how much the speed variation for each vehicle in that section is. Is possible. When the recommended speed is created by the recommended speed creating means 6 based on these, since the speed of each vehicle can be grasped in the third embodiment, the average speed of the whole vehicle in a certain section is used. Is calculated. Then, as shown in FIG. 4, the recommended speed in the middle section may be set as the overall average speed, and the recommended speeds in the preceding and following sections may be set to be increased or decreased little by little according to the actual speed increase / decrease tendency. For example, in the example of FIG. 4, the overall average speed from section 1 to section 5 is 52.4 [km / h], and the current average speed in each section is the average value of the entire section 3 in the middle, It is assumed that the speed is decreasing on the downstream side (front side) with respect to the traffic flow direction, and the speed is increasing on the upstream side (rear side). In this case, the recommended speed in the middle section 3 is set to 52 [km / h] which is substantially equal to the overall average speed. Further, since the actual speed tends to decrease in the recommended speed of the front section, the recommended speed 52 [km / h] in section 3 is slightly decreased (3 km / h) in section 4 to 49 [km / h], and the previous section 5 is slightly reduced (3 km / h) to 46 [km / h]. On the other hand, since the actual speed tends to increase in the rear section, the recommended speed in section 2 is slightly increased (3 km / h) with respect to the recommended speed 52 [km / h] in section 3. 55 [km / h], and the recommended speed for section 1 after that is slightly increased (3 km / h) to 58 [km / h].

  By setting the recommended speed in this way, smooth road traffic can be realized.

  Here, with regard to the calculation of the average speed on the road, a harmonic average that calculates an average considering how many vehicles of which speed are often used. Therefore, it is possible to create information with high utility value by using the harmonized average using the information for each vehicle.

  Further, when the speed history information for each vehicle is available, it is possible to evaluate whether the recommended speed is reflected by the recommended speed reflection degree evaluation means 21. Based on the section that provided the recommended speed and the provided time, information on the vehicles that passed the target section in that time zone is extracted, and the percentage of vehicles that have changed speed to the recommended speed is calculated. Can be evaluated. If this reflection rate can be calculated, it is possible to perform a simulation closer to the actual by using the reflection rate of the recommended speed when the creation recommended speed evaluation unit 20 performs the simulation.

  According to the third embodiment, since it is possible to obtain information on each vehicle, it is possible to calculate the recommended speed more finely. Furthermore, in the evaluation of the recommended speed by the road traffic simulator, it is possible to evaluate by a simulation closer to reality by using the reflection rate of the recommended speed.

(Other examples)
In each of the embodiments described above, provision by the vehicle-mounted device 13 is described in providing information to the driver of the vehicle. However, the same effect can be obtained by using a variable information bulletin board installed on the roadside or a roadside information providing apparatus. can get. In addition, the speed transition of each vehicle can be confirmed by road-to-vehicle communication, and a service such as discounting a vehicle that has traveled along the recommended speed can be realized in cooperation with a fee payment system such as ETC.

1: Roadside sensor 2: Control center 3: Roadside data management means 4: Roadside data DB
5: Roadside data analysis means 6: Recommended speed creation means 7: Recommended speed provision availability determination means 8: Provision information creation means 9: Provision information transmission means 10: Roadside infrastructure 11: Provision information creation means 12 in the roadside infrastructure 12: Roadside infrastructure Provided information transmitting means 13: on-vehicle device 14: provided information receiving means 15 in the on-vehicle device 15: information providing means 16 in the on-vehicle device 16: vehicle information acquiring means 17: vehicle acquisition information transmitting means 18: vehicle acquisition in the roadside infrastructure Information receiving means 19: Vehicle acquisition information transmission means 20 in roadside infrastructure 20: Recommended creation speed evaluation means 21: Recommended speed reflection degree evaluation means

Claims (9)

Road-side data management means for accumulating and reading road-side data including average speed, traffic volume, and density of vehicles in each section of the road from road-side data input from the road side in the road-side data DB;
Roadside data analysis means that uses the past data accumulated in the roadside data DB to obtain the average speed at each density for each section and the difference between the average speeds of each section;
Based on the current information input from the roadside from the past data analyzed by the roadside data analysis means, the value of the average speed difference between adjacent sections at a density similar to the current density is set in advance. more rather than less, teeth be, and the recommended speed generating means for generating a faster recommended speed,
Provided information transmitting means for providing the recommended speed created by the recommended speed creating means to the roadside;
A road driving information providing system characterized by comprising: The road driving information providing system according to claim 1, wherein the recommended speed creating means creates a recommended speed based on a result of executing a micro traffic flow simulation when creating the recommended speed . The vehicle running state information input from the road side to the roadside data management means is data detected by a vehicle detector installed on the roadside, and obtains data on the traffic volume, average speed, and density at the installation location. The road driving information providing system according to claim 1, characterized in that: The vehicle running state information input from the road side to the roadside data management means is data from a probe vehicle traveling on the road, and acquisition of data related to the passing time and speed of each vehicle as probe information. The road driving information providing system according to claim 1 , which is possible . A recommended recommended speed evaluation means for predicting and evaluating a road traffic situation when a recommended speed is provided to a driver by a road traffic simulation for the recommended speed created by the recommended speed creating means. Item 5. The road driving information provision system according to any one of Items 4 to 5 . The recommended speed reflection degree evaluation means for evaluating the recommended speed reflection degree of the driver based on the probe information, the reflection degree evaluated by the recommended speed reflection degree evaluation means for the recommended speed created by the recommended speed creation means 5. The road driving information providing system according to claim 4 , further comprising a creation recommended speed evaluation unit that predicts and evaluates a road traffic situation when a recommended speed is provided to a driver by road traffic simulation . The prepared recommended speed evaluation means includes three cases of maintaining the current state, decreasing the current state, and increasing the current state when predicting and evaluating the road traffic situation when the recommended speed is provided to the driver by the road traffic simulation. 7. The road driving information provision system according to claim 5 or 6 , characterized in that prediction is performed and evaluated . 8. The DSRC communication is used as roadside infrastructure for providing information transmitted from the provision information transmitting means to a roadside that provides information to a vehicle-mounted device of a vehicle traveling on a road. road driving information providing system according to any. The road driving information providing system according to claim 1 , wherein the providing information transmitting means provides information to the roadside using broadcast broadcasting .

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