JP2013025546A - Traffic evaluation device, computer program and traffic evaluation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traffic evaluation device capable of improving repeatability of a traffic evaluation index, and to provide a computer program and a traffic evaluation method.SOLUTION: A traffic simulator 10 includes: a simulator engine part 11 for computing on the basis of a formula indicating a movement model of a vehicle; a traffic volume calculation part 12 for calculating a generated traffic volume and an eliminated traffic volume on the basis of a given OD traffic volume; a queue length calculation part 15 for calculating a queue length of vehicles waiting for right turn on the basis of the traffic volume calculated by the traffic volume calculation part 12; a signal information determination part 16 for determining whether a light color of a traffic signal for a link at a traffic intersection downstream of the link satisfies prescribed conditions; a vehicle recovery part 17 for recovering right-turn vehicles (traffic volume) from a link; and an evaluation criteria setting part 20.

Description

  The present invention relates to a traffic evaluation device that outputs a traffic evaluation index by simulated running of a plurality of simulated vehicles, a computer program for realizing the traffic evaluation device, and a traffic evaluation method using the traffic evaluation device.

  Expectations for traffic simulators are increasing as a means of evaluating the impact of traffic regulations in advance, and various technological developments are being carried out. In such a traffic simulator, traffic information such as traffic volume (for example, OD traffic volume) including vehicle start / end point information, vehicle travel speed, acceleration / deceleration characteristics, etc. is handled as input data. . The OD traffic volume is the traffic volume between the starting point (starting point) and the ending point (destination point) of the vehicle. For example, survey statistical data obtained as a result of statistical surveys conducted regularly by the country or local government Etc. are used.

  The purpose of the traffic simulator is to evaluate or estimate in advance the effects after traffic environment changes such as traffic regulation due to construction, accidents or disasters, new road construction, and improvement of intersections. The traffic simulator includes a movement model of the vehicle, that is, a calculation formula imitating the behavior of the vehicle in advance, and by applying the above input data to the calculation formula, roads such as single intersections, routes, and urban areas Outputs traffic evaluation indicators such as traffic congestion on the network and travel time, or environmental indicators such as carbon dioxide contained in exhaust gas. In this case, the road network is composed of a plurality of links (for example, a road connecting the intersection and the intersection having two directions, up and down) and a node (for example, an intersection) where the links intersect. The

  Specifically, the traffic simulator uses the input OD traffic volume to generate traffic volume (traffic volume flowing into the link) and disappearance traffic volume (traffic volume flowing out of the link) at each link of the road network. Ask for. Then, the traffic simulator generates the number of vehicles corresponding to the generated traffic volume at each link, and deletes the number of vehicles corresponding to the lost traffic volume to obtain the traffic jam length and the like.

  In addition, for a specific section, the time axis data is converted into the space axis data using the travel time of the specific vehicle obtained from the vehicle detectors provided at both ends of the section and the vehicle sensor data obtained in time series. A method for obtaining a traffic jam length by projecting is disclosed (see Patent Document 1).

Japanese Patent Laid-Open No. 08-161686

  When reproducing the traffic situation using a traffic simulator assuming an actual road network, it is ideal to set all the road networks including narrow streets on the simulator. However, setting up to a narrow street not only increases the amount of setting, but also increases the calculation time of the simulation. For this reason, it is common to limit the main roads as target routes, for example, over municipal roads or over prefectural roads according to the size of the area to be simulated.

  When the target route is limited in this way, for example, on a left-handed road such as Japan, when the municipal road is excluded from the simulation target and the prefectural road is the target of the simulation, in fact, turn right from the prefectural road. Even though there are vehicles traveling on the municipal roads, there are no municipal roads on the simulation.Therefore, vehicles that turn right from the prefectural roads and run on the municipal roads are roads above the prefectural roads on the simulation. Turn right at the intersection where.

  That is, the vehicle (traffic volume) that makes a right turn at an intersection where roads more than prefectural roads to be simulated intersect is greater than the actual amount. As a result, in the simulation, for example, the number of vehicles waiting for a right turn on a left-hand road like Japan increases in front of the intersection, and the queue length of the vehicle waiting for a right turn increases. As a result, the straight lane is frequently blocked. And if a right-turn vehicle closes the straight lane before the intersection, the amount of processing at the intersection will decrease, traffic congestion will increase rapidly, and eventually the gridlock phenomenon will occur where most of the road network on the simulation will be congested. Occur. On the right-hand road like the United States, a similar problem occurs with vehicles waiting to turn left.

  In this way, at intersections where roads not subject to simulation intersect, although it is possible to make a right turn on a left-handed road like Japan, it is not possible to make a right turn on the simulation. As a result of the concentration of vehicles, there is a problem that the straight lane is blocked and the traffic situation (traffic evaluation index) cannot be reproduced correctly.

  The present invention has been made in view of such circumstances, a traffic evaluation apparatus capable of improving the reproducibility of a traffic evaluation index, a computer program for realizing the traffic evaluation apparatus, and traffic by the traffic evaluation apparatus The purpose is to provide an evaluation method.

  A traffic evaluation apparatus according to a first aspect of the present invention is a traffic evaluation apparatus that outputs a traffic evaluation index by simulated traveling of a plurality of simulated vehicles, a traffic volume calculating means for calculating a traffic volume that occurs and disappears at an arbitrary link, Based on the traffic information calculated by the traffic information calculation means and the traffic volume calculation means, the signal information acquisition means for acquiring the signal information of the intersection on the downstream side of the link is intersected with the oncoming straight vehicle at the intersection of the period A queue length estimation means for estimating a queue length in a direction, and whether or not a signal for the link at the intersection is red in the current cycle and blue in the latest cycle is satisfied. When it is determined that the condition is not satisfied by the determination unit and the determination unit, the number of vehicles corresponding to a length obtained by subtracting a predetermined length from the queue length estimated by the queue length estimation unit is Characterized in that it comprises a recovery means for yield.

  The traffic evaluation apparatus according to a second aspect of the present invention is the traffic evaluation apparatus according to the first aspect, wherein when the recovery unit determines that the condition is satisfied by the determination unit, the number corresponding to the queue length estimated by the queue length estimation unit The vehicle is configured to be collected.

  According to a third aspect of the present invention, there is provided the traffic evaluation apparatus according to the first or second aspect, further comprising a temporary link that connects the link and the link in the outflow direction, wherein the recovery means recovers the vehicle through the temporary link. It is comprised by these.

  The traffic evaluation device according to a fourth aspect of the present invention is the traffic evaluation device according to any one of the first to third aspects, wherein the predetermined length reaches the dedicated lane during the period from the length of the dedicated lane for the outflow direction. It is the length which subtracted the length equivalent to the maximum value of the number of vehicles to perform.

  A traffic evaluation apparatus according to a fifth aspect of the present invention is a traffic evaluation apparatus that outputs a traffic evaluation index by simulating traveling of a plurality of simulated vehicles, a traffic volume calculating means for calculating a traffic volume that occurs and disappears at an arbitrary link, Based on the traffic information calculated by the traffic information calculation means and the traffic volume calculation means, the signal information acquisition means for acquiring the signal information of the intersection on the downstream side of the link is intersected with the oncoming straight vehicle at the intersection of the period A queue length estimation means for estimating a queue length in a direction, and whether or not a signal for the link at the intersection is red in the current cycle and blue in the latest cycle is satisfied. A determination unit; and a recovery unit that recovers the number of vehicles corresponding to the queue length estimated by the queue length estimation unit from the link when the determination unit determines that the condition is satisfied. And wherein the door.

  A computer program according to a sixth aspect of the present invention is a computer program for causing a computer to execute a step of outputting a traffic evaluation index by simulated traveling of a plurality of simulated vehicles. A step of calculating, a step of estimating a queue length in a direction intersecting with an oncoming straight vehicle at an intersection on the downstream side of the link having an arbitrary period based on the calculated traffic volume, and a signal for the link at the intersection Are determined to satisfy the condition that the current period is red and the latest period is blue, and if the condition is not satisfied, the predetermined length is calculated from the estimated queue length. Collecting a number of vehicles corresponding to the subtracted length from the link.

  A traffic evaluation method according to a seventh aspect of the present invention is a traffic evaluation method by a traffic evaluation apparatus that outputs a traffic evaluation index by simulating traveling of a plurality of simulated vehicles, calculating a traffic volume that occurs and disappears at an arbitrary link; A step of obtaining signal information of an intersection on the downstream side of an arbitrary link every arbitrary period, and a queue length in a direction intersecting with an opposite straight vehicle at the intersection of the period based on the calculated traffic volume Estimating, determining whether the signal for the link at the intersection is red in the current period and blue in the most recent period, and determining that the condition is not satisfied And a step of collecting from the link a number of vehicles corresponding to a length obtained by subtracting a predetermined length from the estimated queue length.

  In the first invention, the sixth invention, and the seventh invention, the traffic volume that occurs and disappears at an arbitrary link is calculated. When using the starting / ending point information of traveling of the vehicle, a link between the starting point and the ending point can be used as an arbitrary link. The starting / ending point information of the traveling of the vehicle is, for example, OD traffic volume, and the traffic volume between the starting point (starting place) and the ending point (destination) of the vehicle is obtained as an actual measurement value. The traffic volume that occurs or disappears at any link can be calculated using OD traffic volume or the like. Signal information at an intersection on the downstream side of an arbitrary link is acquired every arbitrary period. The arbitrary period is a period for obtaining a correction term (correction value) for bringing the current traffic evaluation index close to the actual measurement value. For example, the period is 10 seconds, 50 seconds, 1 minute, 5 minutes, or the like. It can be set accordingly.

  Based on the calculated traffic volume, the queue length in the direction intersecting with the oncoming straight vehicle at the intersection of the cycle is estimated. The direction intersecting with the oncoming straight vehicle is, for example, a right turn direction in left-hand traffic as in Japan, and a left turn direction in right-hand traffic as in the United States. In the following description, it is assumed that the vehicle is on the left side as in Japan, and the direction intersecting with the oncoming vehicle is the right turn direction. Whether the signal for the link at the intersection (ie, the signal at the intersection for vehicles traveling on the link towards the intersection) is red in the current cycle and blue in the most recent cycle Determine whether or not. The current cycle is the current correction cycle when the correction term is obtained, and the latest cycle is the correction cycle immediately before the current correction cycle. For example, when the correction cycle is 10 seconds, if the current cycle is the current time, the latest cycle is the time 10 seconds before the current time. The condition that the current cycle is red and the latest cycle is blue is a condition for determining the switching of the signal, and it is determined whether or not the blue signal (blue arrow) is switched to the red signal. Yes.

  The case where the condition is not satisfied is, for example, when the correction cycle is set to 10 seconds, the time point 10 seconds before the current time point and the current time point are both red signals, and when the red signal is switched to the blue signal, whichever This is also the case for a green light. If the condition is not satisfied, the number of vehicles corresponding to the length obtained by subtracting the predetermined length from the estimated queue length is collected from the link. The predetermined length is a length from the position of the intersection (stop viewing position) and corresponds to a position where the vehicle is collected. That is, the remaining vehicle obtained by subtracting the vehicle corresponding to the predetermined length from the vehicle waiting for the right turn is collected from the right turn lane in the simulation so that the straight lane is not blocked. By collecting the vehicle from the link, it is possible to prevent the straight lane from being blocked and to correctly reproduce the traffic evaluation index even when there is a road that is not subject to simulation. Also, before setting the evaluation conditions such as traffic environment, it is possible to reproduce the state where the signal control is appropriate in the simulation, and in the simulation after setting the evaluation conditions due to changes in the traffic environment, etc. Can be reproduced faithfully.

  In the second and fifth inventions, when the condition is satisfied, the number of vehicles corresponding to the queue length estimated in advance is collected. The case where the condition is satisfied is, for example, a case where the blue (blue arrow) signal is switched to the red signal at the time point 10 seconds before and the current time point when the correction cycle is 10 seconds. If this condition is met, all the vehicles waiting for a right turn while traveling from the green light to the red light will travel in the desired direction of exit from the intersection. It is assumed that the green signal time is appropriate (for example, right turn sensitive control is appropriate). As a result, even when there is a road that is not subject to the simulation, it is possible to prevent the straight lane from being blocked and to correctly reproduce the traffic evaluation index. Also, before setting the evaluation conditions such as traffic environment, it is possible to reproduce the state where the signal control is appropriate in the simulation, and in the simulation after setting the evaluation conditions due to changes in the traffic environment, etc. Can be reproduced faithfully.

  In the third invention, a provisional link for connecting the link and the link in the outflow direction is provided. The provisional link is a dummy lane that is a virtual lane that can collect vehicles regardless of the signal light color. By collecting the vehicle through the provisional link, the vehicle can be collected at the link to the desired intersection on the simulation.

  In the fourth invention, the predetermined length is a length obtained by subtracting a length corresponding to the maximum number of vehicles reaching the dedicated lane during the cycle from the length of the dedicated lane for the outflow direction. . For example, if the exclusive lane is a right turn exclusive lane, the length of the right turn exclusive lane is L1, and a predetermined length (the length from the position of the intersection and corresponding to the position where the vehicle is collected) is L2, L1- L2 is a length corresponding to the maximum number of vehicles that reach the right turn dedicated lane during the correction period (for example, 10 seconds). That is, the position where the vehicle is collected (predetermined length L2 from the intersection) is the value obtained by subtracting the length corresponding to the maximum number of vehicles reaching the right turn lane during the correction period from the length of the right turn lane from L1. By doing so, it is possible to prevent the vehicle from overflowing from the right turn exclusive lane.

  According to the present invention, it is possible to improve the reproducibility of a traffic evaluation index even when a road that is not a simulation target exists.

It is a schematic diagram which shows the example of the vehicle behavior in the traffic simulator which is an example of the traffic evaluation apparatus which concerns on this Embodiment. It is a schematic diagram which shows an example of the starting / ending point information of a vehicle. It is explanatory drawing which shows an example of OD traffic volume. It is a schematic diagram which shows an example of the generated traffic volume and the extinction traffic volume based on a given OD traffic volume. It is a block diagram which shows the structural example of the traffic simulator as an example of the traffic evaluation apparatus which concerns on this Embodiment. It is a schematic diagram which shows obstruction | occlusion of the straight lane by concentration of the right turn vehicle. It is a schematic diagram which shows an example of the intersection vicinity provided with a right turn exclusive lane. It is a schematic diagram which shows an example of the dummy lane in the case of collect | recovering vehicles from a link. It is a flowchart which shows the process sequence at the time of the present condition reproduction of the traffic simulator of this Embodiment. It is a flowchart which shows the process sequence after the evaluation condition setting of the traffic simulator of this Embodiment.

  Hereinafter, a traffic evaluation apparatus according to the present invention, a computer program for realizing the traffic evaluation apparatus, and a traffic evaluation method using the traffic evaluation apparatus will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an example of vehicle behavior in a traffic simulator which is an example of a traffic evaluation apparatus according to the present embodiment. The traffic simulator outputs a traffic evaluation index by simulated running of a plurality of simulated vehicles. The traffic simulator has, as input data, for example, a traffic volume including start / end point information of vehicle travel (for example, OD traffic volume, O is Origin, D is Destination), vehicle travel speed, acceleration / deceleration characteristics, etc. Traffic information is treated as given. The OD traffic volume is the traffic volume between the starting point (starting point) and the ending point (destination point) of the vehicle. For example, the generated traffic volume and the extinguished traffic volume for each administrative unit such as a city or town. Including. As the OD traffic volume, survey statistical data obtained as a result of a statistical survey regularly conducted by the national or local government is used.

  The traffic simulator contains a movement model of the vehicle, that is, a calculation formula that simulates the behavior of the vehicle in advance, and by applying the above input data to the calculation formula, a plurality of vehicles are simulated and run. It outputs traffic evaluation indexes such as congestion length, travel time, traffic volume, queue length in road networks such as single intersections, routes and urban areas. In this case, the road network is composed of a plurality of links (for example, a road connecting the intersection and the intersection having two directions, up and down) and a node (for example, an intersection) where the links intersect. The FIG. 1 illustrates three nodes and two links as a part of the road network.

  FIG. 2 is a schematic diagram showing an example of vehicle start / end information. When a traffic evaluation index is reproduced by a traffic simulator, in a relatively simple road network such as a single intersection or a route, the starting and ending point information of vehicle travel is set at both end points of the road. However, in a relatively complicated road network in which a plurality of routes such as urban areas intersect, in order to reproduce the traffic having the starting point (starting point) inside and outside the simulation area S and the traffic having the destination point (ending point), Information on starting point (starting point) and ending point (destination point) of driving is given to the vehicle.

  As shown in FIG. 2, the road network includes a plurality of nodes corresponding to intersections and roads connecting the intersections as links. In the example of FIG. 2, the simulation area S is set in part or all of the road network. Outside the simulation area S are start and end points A1, A2,... A12. Further, inside the simulation area S, there are start point / end points B1, B2, and B3. Note that the start point and end point are examples, and are not limited to the example of FIG. As shown in FIG. 2, as an example, an outside traffic having an origin A5 and an end point A6, an outside traffic having an origin A5 and an end point B1, an inside traffic having an origin B2 and an end point B3, There are domestic and foreign traffic with B2 and end point A8. Each vehicle is given a starting point and an ending point based on the OD traffic volume and the like, and the behavior of the vehicle such as a travel route from the starting point to the ending point can be obtained according to the vehicle movement model.

  FIG. 3 is an explanatory diagram showing an example of the OD traffic volume. In the example of FIG. 3, the traffic volume in the case of the starting point / end points A1, A5, A6, A10, and A12 in FIG. 2 is given. In addition, the example of a starting point end point is an example, and is not limited to this. In the example of FIG. 3, for example, it is shown that there are 40 traffic volumes with a start point A1 and an end point A5 within a predetermined time. In addition, it shows that there are 150 traffic volumes starting from A10 and ending at A5. Others are the same. Note that the number of vehicles shown in FIG. 3 is merely schematically illustrated, and the values are illustrative and are not limited.

  FIG. 4 is a schematic diagram showing an example of generated traffic volume and extinct traffic volume based on a given OD traffic volume. In the example of FIG. 4, two links 1 and 2 are illustrated. Moreover, the node which shows an intersection has illustrated the right turn direction link whose outflow direction is right turn seeing from the links 1 and 2. The traffic simulator calculates the generated traffic volume and the disappeared traffic volume at each link in the simulation area S based on a given OD traffic volume. As shown in FIG. 4, the generated traffic volume exists upstream of the link 1 and the extinct traffic volume exists downstream of the link 1. Note that traffic may be generated or disappeared in the middle of the link 1. Similarly, there is a generated traffic volume upstream of the link 2 and an extinct traffic volume downstream of the link 1. In addition, in the point (intersection) where link 1 and link 2 cross, inflow traffic and outflow traffic from other links exist.

  Then, the traffic length, travel time, traffic volume, queue length, and the like are output as traffic evaluation indices using the generated traffic volume and the disappeared traffic volume calculated for each link. The traffic simulator (traffic evaluation device) according to the present embodiment presumes a left-handed road like Japan, estimates a right turn queue at any link, and the state of the signal light color at the intersection downstream of the link The reproducibility of the traffic evaluation index is improved by collecting the vehicle waiting for the right turn from the link in accordance with the (signal switching state). For roads with right-hand traffic, such as the United States, a left turn queue at an arbitrary link is estimated, and a left turn is waited from the link according to the signal light color state (signal switching state) at the intersection downstream of the link. It is sufficient to collect the vehicle.

  FIG. 5 is a block diagram showing a configuration example of a traffic simulator 10 as an example of a traffic evaluation apparatus according to the present embodiment. The traffic simulator 10 includes a simulator engine unit 11 that performs calculation based on a calculation formula representing a vehicle movement model, a traffic volume calculation unit 12 that calculates generated traffic volume and extinct traffic volume based on a given OD traffic volume, traffic Based on the traffic volume calculated by the traffic volume calculation unit 12, the estimated traffic jam length calculation unit 13 calculates (estimates) the estimated traffic jam length at each link, and at each link based on the traffic volume calculated by the traffic volume calculation unit 12. The estimated traffic volume calculation unit 14 that calculates (estimates) the estimated traffic volume of the vehicle, the queue length calculation unit 15 that calculates (estimates) the queue length of the vehicle waiting for the right turn, and the signal light color for the link at the intersection downstream of the link is predetermined. A signal information determination unit 16 that determines whether or not a condition is satisfied, a vehicle recovery unit 17 that recovers a right turn vehicle (traffic volume) from the link, a storage unit 18 that stores predetermined information, and a vehicle ( In correspondence with the passing amount) and re-emit the vehicle on the downstream side of the link (to generate traffic) re-emitting portion 19, and the like evaluation condition setting unit 20.

  In the traffic simulator 10, as input data, for example, vehicle travel speed, acceleration / deceleration characteristics, vehicle travel start / end point information, traffic volume, actual traffic congestion length, actual traffic volume, signal lights at each intersection where links intersect. Data such as signal information (signal control information) is given.

  The traffic simulator 10 has a function as signal information acquisition means for acquiring signal information of an intersection on the downstream side of an arbitrary link for every arbitrary period. The arbitrary period is a period for obtaining a correction term (correction value) for bringing the current traffic evaluation index close to the actual measurement value. For example, the period is 10 seconds, 50 seconds, 1 minute, 5 minutes, or the like. It can be set accordingly. In the following description, the correction cycle is 10 seconds, but is not limited to this.

  The traffic simulator 10 outputs the traffic jam length (estimated traffic jam length) of each link, the travel time of the vehicle, the traffic volume, the number of queues, etc., which are traffic evaluation indexes, using the input data. The traffic evaluation index is displayed on a map representing the road network. The traffic evaluation index may include an emission amount of environmental pollutants (such as carbon dioxide) (for example, environmental index). When the traffic jam length or traffic volume can be obtained with good reproducibility, the travel time and the amount of environmental pollutants discharged are also proportional to the traffic jam length, so that it can be obtained with good reproducibility.

  First, the obstruction of the straight lane due to the concentration of right turn vehicles or left turn vehicles, which is a problem to be solved by the traffic simulator 10, will be described. FIG. 6 is a schematic diagram showing the blockage of the straight lane due to the concentration of right turn vehicles. As shown in FIG. 6, the main roads (for example, prefectural roads) R1 and R2 which are simulation targets intersect at an intersection C3. In addition, municipal roads R101 and R102 which are not targeted for simulation intersect the main road R1 at intersections C2 and C1, respectively. The road configuration in FIG. 6 is an example.

  A vehicle that actually travels on the main road R1 in the direction of the intersection C3 can turn right toward the municipal roads R101 and R102 at the intersection C1 or the intersection C2, respectively. ) Exists to some extent. However, on the simulation, the municipal roads R101 and R102 are regarded as being out of scope and not present. For this reason, a vehicle that makes a right turn at the intersections C1 and C2 cannot actually turn right in the simulation. Therefore, a vehicle that makes a right turn at the intersection C3 (indicated by an arrow A) in the simulation is concentrated, and vehicles that make a right turn at the intersection C3 are concentrated. Thus, the straight lane is blocked by the right turn vehicle.

  The traffic simulator 10 of the present embodiment prevents such blockage of the straight lane and correctly reproduces the traffic situation (traffic evaluation index).

  The traffic volume calculation unit 12 uses the OD traffic volume (traffic volume including start / end point information of vehicle travel) to generate the generated traffic volume at an arbitrary link between the start point and the end point and to disappear at an arbitrary link. Calculate traffic volume.

  The estimated traffic jam length calculation unit 13 calculates (estimates) the estimated traffic jam length of the vehicle at an arbitrary link based on the traffic volume calculated by the traffic volume calculation unit 12. When obtaining the estimated traffic jam length, parameters such as the traveling speed of the vehicle, acceleration / deceleration characteristics, signal display at intersections at both ends of the link, and link length are stored in the storage unit 18 and the parameters are used. Can do.

  The estimated traffic volume calculation unit 14 calculates (estimates) the estimated traffic volume at an arbitrary link based on the traffic volume calculated by the traffic volume calculation unit 12. When obtaining the estimated traffic volume, parameters such as the vehicle traveling speed, acceleration / deceleration characteristics, signal display at intersections of both ends of the link, link length, and the like are stored in the storage unit 18 and the parameters are used. Can do.

  Based on the traffic volume calculated by the traffic volume calculation unit 12, the queue length calculation unit 15 estimates the queue length in the direction intersecting with the oncoming straight vehicle at the downstream intersection of an arbitrary link for each arbitrary correction period. Function as queue length estimation means. The direction intersecting with the oncoming straight vehicle is, for example, a right turn direction in left-hand traffic as in Japan, and a left turn direction in right-hand traffic as in the United States. In the present embodiment, it is assumed that the vehicle is on the left side as in Japan, and the direction intersecting with the oncoming vehicle is the right turn direction. Further, when obtaining the queue length, parameters such as the vehicle traveling speed, acceleration / deceleration characteristics, signal display at intersections of both ends of the link, link length, and the like are stored in the storage unit 18 and the parameters are used. Can do.

  The signal information determination unit 16 functions as a determination unit that determines whether or not the signal for the link at an arbitrary link downstream intersection is red in the current cycle and blue in the latest cycle. Have The signal information determination unit 16 determines whether or not the signal at the intersection for the vehicle traveling on the link toward the intersection satisfies the condition that the current cycle is red and the latest cycle is blue. To do.

  The current cycle is a current correction cycle when obtaining a correction term (corresponding to the number of vehicles collected by the vehicle collection unit 17), and the latest cycle is a correction cycle immediately before the current correction cycle. . For example, when the correction cycle is 10 seconds, if the current cycle is the current time, the latest cycle is the time 10 seconds before the current time. The condition that the current cycle is red and the latest cycle is blue is a condition for determining the switching of the signal, and it is determined whether or not the blue signal (blue arrow) is switched to the red signal. Yes.

  The case where the condition is not satisfied is, for example, when the correction cycle is set to 10 seconds, the time point 10 seconds before the current time point and the current time point are both red signals, and when the red signal is switched to the blue signal, whichever This is also the case for a green light.

  The case where the condition is satisfied is, for example, a case where the blue (blue arrow) signal is switched to the red signal at a time point 10 seconds before and the current time point when the correction cycle is 10 seconds. .

  When the condition is not satisfied, the vehicle collection unit 17 collects a number of vehicles corresponding to a length obtained by subtracting a predetermined length from the estimated queue length from the link. The predetermined length is a length from the position of the intersection (stop viewing position) and corresponds to a position where the vehicle is collected. That is, the remaining vehicle obtained by subtracting the vehicle corresponding to the predetermined length from the vehicle waiting for the right turn is collected from the right turn lane in the simulation so that the straight lane is not blocked.

  By collecting the vehicle from the link, it is possible to prevent the straight lane from being blocked and to correctly reproduce the traffic evaluation index even when there is a road that is not subject to simulation. Also, before setting the evaluation conditions such as traffic environment, it is possible to reproduce the state where the signal control is appropriate in the simulation, and in the simulation after setting the evaluation conditions due to changes in the traffic environment, etc. Can be reproduced faithfully.

  FIG. 7 is a schematic diagram showing an example of the vicinity of an intersection having a right turn lane. As shown in FIG. 7, a right turn exclusive lane having a length L1 is provided between the stop line at the intersection and the point S1. The above-mentioned predetermined length is the distance from the stop line of the position (point) S2 where the vehicle is collected, and the predetermined length is L2. The predetermined length L2 is, for example, a length corresponding to the maximum value of the number of vehicles that reach the right turn lane during the correction period (for example, 10 seconds) from the length L1 of the right turn lane (outward lane). The length can be obtained by subtracting. That is, L1-L2 is a length corresponding to the maximum value of the number of vehicles that reach the right turn dedicated lane during the correction period (for example, 60 seconds).

  For example, the length L1 of the right-turn exclusive lane is 100 m (equivalent to 12 vehicles when divided by an average vehicle head distance of 8 m), and the maximum value of right-turn vehicles that reach the right-turn exclusive lane within 10 seconds of the correction cycle is 3 ( The predetermined length L2 is 76 m (100-24) and corresponds to the length of about nine vehicles.

  It is assumed that the number of vehicles waiting for a right turn calculated by the queue length calculation unit 15 is 15 per cycle (correction period) at the time of reproducing the current state in the simulation (before setting the evaluation conditions). It is assumed that the determination result in the signal information determination unit 16 does not satisfy the above-described condition. In this case, since the vehicle stopped upstream from the point S2 (predetermined length L2 from the stop line) of the right-turn exclusive lane is collected, among the 15 vehicles waiting for the right turn, the first one to the ninth one Until then, the vehicle stops in the right turn lane and the 10th to 15th vehicles are collected from the link.

  The section (L1-L2) in FIG. 7 has a length corresponding to the maximum value of the number of vehicles that reach the right-turn exclusive lane during the correction cycle. Overflow can be prevented, and a straight lane is not blocked by a right turn vehicle.

  FIG. 8 is a schematic diagram showing an example of a dummy lane when a vehicle is collected from a link. As shown in FIG. 8, a dummy link (provisional link) that connects the link and the link in the outflow direction is provided. The dummy link is a virtual lane that can collect the vehicle regardless of the signal light color of the intersection. By collecting the vehicle through the dummy link, the vehicle can be collected at the link to the desired intersection on the simulation.

  The vehicle collection unit 17 collects a number of vehicles corresponding to the estimated queue length when the determination result in the signal information determination unit 16 satisfies the above-described condition. The case where the condition is satisfied is, for example, a case where the blue (blue arrow) signal is switched to the red signal at the time point 10 seconds before and the current time point when the correction cycle is 10 seconds.

  If this condition is met, all the vehicles waiting for a right turn while traveling from the green light to the red light will travel in the desired direction of exit from the intersection. It is assumed that the green signal time is appropriate (for example, right turn sensitive control is appropriate). That is, instead of extending the blue time by the right turn sensitive control, by collecting all the right turn waiting vehicles at the time of switching to the red light, it is possible to appropriately hit the right turn waiting vehicles.

  As a result, even when there is a road that is not subject to the simulation, it is possible to prevent the straight lane from being blocked and to correctly reproduce the traffic evaluation index. Also, before setting the evaluation conditions such as traffic environment, it is possible to reproduce the state where the signal control is appropriate in the simulation, and in the simulation after setting the evaluation conditions due to changes in the traffic environment, etc. Can be reproduced faithfully.

  In addition, instead of extending the blue time by right turn sensitive control, when the traffic simulator 10 incorporates a function for sequentially adjusting the blue time according to the traffic volume of the right turn vehicle such as a right turn sensitive function, the signal switching point At the time when the signal changes from blue to red, for example, it is not necessary to collect all the vehicles. In this case, the signal information determination unit 16 may not be provided.

  Even if the traffic simulator 10 has a right-turn sensitive function, right-turn cars are concentrated at intersections where right-turns are possible on the simulator. Therefore, it is better to collect right-turn cars when the signal changes from blue to red. That is, in principle, if a right turn sensitive control function or the like is incorporated in the traffic simulator 10, it is not necessary to collect a right turn vehicle. However, on the simulator, right-turn cars are concentrated at intersections where it is possible to turn right.

  When the vehicle (the vehicle waiting for a right turn) is collected from an arbitrary link, the re-emission unit 19 re-emits the equivalent vehicle on the downstream side of the link. When a vehicle (right turn vehicle) is collected at an arbitrary link, the traffic volume at that link decreases, so the downstream traffic volume decreases, and the difference between the estimated value and actual measurement value of the traffic evaluation index at the downstream link May occur. When a vehicle is collected at an arbitrary link, an equivalent vehicle is re-released at the downstream side of the link to prevent the downstream side of the link from being affected by the recovery of the vehicle at the link. Can do. In addition, when a vehicle is collected at an arbitrary link, and the same vehicle is re-released on the downstream side of the link, the end point (original extinction point) of the vehicle collected at the time of collection is stored, and the re-release The end point memorize | stored in each vehicle at the time can also be given. Note that the end point may be given by other methods.

  When the vehicle collection unit 17 collects a vehicle (a vehicle waiting to turn right) from an arbitrary link, the re-release unit 19 can prevent the equivalent vehicle from being released again on the downstream side of the link.

  In addition, the re-emission part 19 is not an essential structure. That is, the re-release of the vehicle is not essential and can be omitted. When the re-release is omitted, the influence on the downstream link by collecting the vehicle can be left to the correction process at the downstream link.

  The evaluation condition setting unit 20 sets an evaluation condition for evaluating the traffic state quantity. The evaluation conditions include, for example, traffic measures such as traffic regulation due to construction, accidents or disasters, new road construction, changes in traffic environment such as improvement of intersections, provision of traffic information, and adjustment of traffic signal control.

  Next, operation | movement of the traffic simulator 10 of this Embodiment is demonstrated. FIG. 9 is a flowchart showing a processing procedure at the time of reproducing the current state of the traffic simulator 10 of the present embodiment. The current state reproduction is a simulation before setting evaluation conditions such as a traffic environment. The traffic simulator 10 determines whether or not a correction cycle (for example, 10 seconds) has passed (S11), and when the correction cycle has passed (YES in S11), that is, 10 seconds have passed since the previous correction timing. In this case, signal information is acquired (S12), and the right turn queue length is calculated (S13).

  The traffic simulator 10 determines whether or not the signal in the current correction cycle is red and the signal in the latest correction cycle is blue (S14), and if the condition is satisfied (YES in S14), All the vehicles on the right turn lane (right turn vehicles) are collected (S15), and the process of step S17 described later is performed.

  If the above-mentioned conditions are not satisfied (NO in S14), the traffic simulator 10 collects a vehicle (right turn vehicle) that is stopped on the right turn lane at a position (upstream) above the threshold (predetermined length) from the stop line ( S16).

  The traffic simulator 10 records the number of collected vehicles together with the time in the storage unit 18 (S17), and re-releases the vehicles collected from the right turn lane in the right turn direction at the link downstream intersection (S18). The traffic simulator 10 generates a vehicle from the starting point (departure point), collects the vehicle at the end point (destination point) (S19), advances the signal lamp color of the signal lamp by, for example, 0.1 second, and follows the movement model of the vehicle. The vehicle is caused to travel (S20), and the simulation cycle (for example, 0.1 second) is terminated.

  If the correction cycle has not elapsed (NO in S11), the traffic simulator 10 performs the processing after step S18.

  FIG. 10 is a flowchart showing a processing procedure after setting the evaluation conditions of the traffic simulator 10 of the present embodiment. The traffic simulator 10 sets evaluation conditions (S31), determines whether or not a correction cycle (for example, 10 seconds) has passed (S32), and if the correction cycle has passed (YES in S32), that is, the previous time When 10 seconds elapse from the correction timing, the corrected number (recovered number) before setting the evaluation condition in the same cycle as the current cycle is acquired (S33).

  The traffic simulator 10 determines whether or not the corrected number is larger (larger) than the existing number on the link (S34). If the corrected number is larger than the existing number on the link (YES in S34), it exists on the link. The number of vehicles to be collected is collected from the link (S35), and the difference between the corrected number and the number existing on the link is added to the corrected number in the next correction cycle (S36).

  If the corrected number is not larger than the existing number on the link (NO in S34), the traffic simulator 10 collects the corrected number of vehicles from the link (S37). The traffic simulator 10 re-releases the vehicle collected from the right turn lane in the right turn direction at the link downstream intersection (S38).

  The traffic simulator 10 generates a vehicle from the starting point (departure point), collects the vehicle at the end point (destination point) (S39), advances the signal light color of the signal light device by, for example, 0.1 second, and follows the movement model of the vehicle. The vehicle is caused to travel (S40), and the simulation cycle (for example, 0.1 second) is terminated. If the correction period has not elapsed (NO in S32), the traffic simulator 10 performs the processing after step S38.

  The processing illustrated in FIGS. 9 and 10 is repeatedly performed every time a simulation cycle (for example, 0.1 second) elapses. Further, it can be omitted without performing the process of step S18. Further, when step S18 is omitted in FIG. 9, step S38 of FIG. 10 is omitted.

  The traffic simulator 10 described above can also be realized using a general-purpose computer including a CPU, a RAM, and the like. That is, the traffic simulator 10 is realized on a computer by loading a program code defining each processing procedure into a RAM provided in the computer as shown in FIGS. 9 and 10 and executing the program code by the CPU. be able to.

  As described above, the traffic simulator 10 according to the present embodiment can improve the reproducibility of the traffic evaluation index even when there is a road that is not a simulation target. By improving the reproducibility of the traffic evaluation index, it is possible to correctly evaluate the traffic evaluation index after setting the evaluation conditions.

  In addition, after setting the evaluation conditions, by collecting the corrected number (collected number) recorded before the evaluation condition setting with the same link for each same period, the correction items stored for each correction period during the current reproduction are the same. Because it is reflected in the traffic simulator, the traffic situation (traffic evaluation index) such as the traffic volume, congestion length, travel time, carbon dioxide emissions at the time of the current reproduction and the assumed case (the case where the current situation and traffic conditions have changed) And the traffic evaluation index can be compared before and after setting the evaluation condition.

  In the above-described embodiment, it is assumed that the vehicle is on the left side as in Japan and the direction intersecting with the oncoming straight vehicle is the right turn direction, and the collection of the right turn vehicle has been described. However, the present invention is not limited to this. As described above, in the case of a right-hand traffic road, the direction intersecting with the oncoming straight vehicle is the left turn direction, and the present embodiment can be similarly applied to the left turn vehicle. Also, as a rule, vehicles are collected for vehicles that turn in a direction crossing with oncoming straight vehicles, but for vehicles that turn in other directions, that is, on left-handed roads like Japan, You may collect vehicles for both. This is because, when the number of vehicles waiting for a left turn increases on a left-handed road like Japan, it is possible to prevent a straight vehicle following the vehicle waiting for a left turn from smoothly passing through the intersection.

  The disclosed embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 10 Traffic simulator 11 Simulator engine part 12 Traffic volume calculation part (traffic volume calculation means)
13 Estimated traffic length calculation unit 14 Estimated traffic volume calculation unit 15 Queue length calculation unit (queue length estimation means)
16 Signal information determination part (determination means)
17 Vehicle collection unit (collection means)
18 Storage unit 19 Re-release unit 20 Evaluation condition setting unit

Traffic evaluation apparatus according to the first invention, the traffic evaluation device for outputting traffic metrics by each of the plurality of vehicles both to simulate running one or more links composing the road network based on individual electromotive end point information waits for estimating the signal information acquisition means for acquiring signal information of the downstream side of the intersection of the link arbitrary every arbitrary cycle, the queue length in a direction crossing the opposing straight vehicle at the intersection of the pre-Symbol cycle Matrix length estimation means, determination means for determining whether a signal for the link at the intersection is red in the current period and blue in the latest period, and the determination means A recovery means for recovering from the link a number of vehicles corresponding to a length obtained by subtracting a predetermined length from the queue length estimated by the queue length estimation means when it is determined that the condition is not satisfied. To.

Traffic evaluation apparatus according to the fifth invention, the traffic evaluation device for outputting traffic metrics by each of the plurality of vehicles both to simulate running one or more links composing the road network based on individual electromotive end point information waits for estimating the signal information acquisition means for acquiring signal information of the downstream side of the intersection of the link arbitrary every arbitrary cycle, the queue length in a direction crossing the opposing straight vehicle at the intersection of the pre-Symbol cycle Matrix length estimation means, determination means for determining whether a signal for the link at the intersection is red in the current period and blue in the latest period, and the determination means When it is determined that the condition is satisfied, the vehicle includes a collection unit that collects a number of vehicles corresponding to the queue length estimated by the queue length estimation unit from the link.

A computer program according to the sixth invention, in the computer, the step of each of the plurality of vehicles both outputs traffic metrics by simulating running one or more links composing the road network based on individual electromotive end point information a computer program for executing, on a computer, the steps of estimating the queue length in a direction crossing the opposing straight vehicle on the downstream side of the intersection of the link of the period of arbitrary, signal for the link of the intersection Determining whether or not the condition that is red in the current cycle and blue in the latest cycle is satisfied, and subtracting the predetermined length from the estimated queue length if it is determined that the condition is not satisfied Collecting a number of vehicles corresponding to the length from the link.

Traffic evaluation method according to the seventh invention, due to traffic evaluation device for outputting traffic metrics by each of the plurality of vehicles both to simulate running one or more links composing the road network based on individual electromotive end point information a traffic evaluation method to estimate acquiring signal information of the downstream side of the intersection of the link arbitrary every arbitrary cycle, the queue length in a direction crossing the opposing straight vehicle at the intersection of the pre-Symbol cycle Determining whether the signal for the link at the intersection is red in the current period and blue in the most recent period, and determining that the condition is not satisfied And collecting a number of vehicles corresponding to a length obtained by subtracting a predetermined length from the estimated queue length from the link.

The first invention, in the sixth invention and the seventh invention, to obtain the signal information of the downstream side of the intersection of the link arbitrary every arbitrary cycle. The arbitrary period is a period for obtaining a correction term (correction value) for bringing the current traffic evaluation index close to the actual measurement value. For example, the period is 10 seconds, 50 seconds, 1 minute, 5 minutes, or the like. It can be set accordingly.

Estimating the queue length in a direction crossing the opposing straight vehicle at the intersection of those said periodic. The direction intersecting with the oncoming straight vehicle is, for example, a right turn direction in left-hand traffic as in Japan, and a left turn direction in right-hand traffic as in the United States. In the following description, it is assumed that the vehicle is on the left side as in Japan, and the direction intersecting with the oncoming vehicle is the right turn direction. Whether the signal for the link at the intersection (ie, the signal at the intersection for vehicles traveling on the link towards the intersection) is red in the current cycle and blue in the most recent cycle Determine whether or not. The current cycle is the current correction cycle when the correction term is obtained, and the latest cycle is the correction cycle immediately before the current correction cycle. For example, when the correction cycle is 10 seconds, if the current cycle is the current time, the latest cycle is the time 10 seconds before the current time. The condition that the current cycle is red and the latest cycle is blue is a condition for determining the switching of the signal, and it is determined whether or not the blue signal (blue arrow) is switched to the red signal. Yes.

Claims (7)

In a traffic evaluation device that outputs a traffic evaluation index by simulated driving of a plurality of simulated vehicles,
A traffic volume calculation means for calculating the traffic volume that occurs and disappears at any link;
Signal information acquisition means for acquiring signal information of an intersection on the downstream side of an arbitrary link every arbitrary period;
Based on the traffic volume calculated by the traffic volume calculation means, a queue length estimation means for estimating a queue length in a direction intersecting with an opposite straight vehicle at the intersection of the cycle;
Determining means for determining whether a signal for the link at the intersection is red in the current cycle and blue in the latest cycle;
A recovery means for recovering from the link a number of vehicles corresponding to a length obtained by subtracting a predetermined length from the queue length estimated by the queue length estimation means when the determination means determines that the condition is not satisfied; A traffic evaluation device comprising: The recovery means includes
2. The vehicle according to claim 1, wherein when the determination unit determines that the condition is satisfied, the number of vehicles corresponding to the queue length estimated by the queue length estimation unit is collected. Traffic evaluation device. A provisional link connecting the link and the link in the outflow direction;
The recovery means includes
The traffic evaluation apparatus according to claim 1, wherein the vehicle is collected through the temporary link. The predetermined length is
The length of the exclusive lane for the outflow direction is a length obtained by subtracting a length corresponding to the maximum number of vehicles reaching the dedicated lane during the cycle. 4. The traffic evaluation device according to any one of 3 above. In a traffic evaluation device that outputs a traffic evaluation index by simulated driving of a plurality of simulated vehicles,
A traffic volume calculation means for calculating the traffic volume that occurs and disappears at any link;
Signal information acquisition means for acquiring signal information of an intersection on the downstream side of an arbitrary link every arbitrary period;
Based on the traffic volume calculated by the traffic volume calculation means, a queue length estimation means for estimating a queue length in a direction intersecting with an opposite straight vehicle at the intersection of the cycle;
Determining means for determining whether a signal for the link at the intersection is red in the current cycle and blue in the latest cycle;
And a collection unit that collects a number of vehicles corresponding to the queue length estimated by the queue length estimation unit from the link when the determination unit determines that the condition is satisfied. . In a computer program for causing a computer to execute a step of outputting a traffic evaluation index by simulated running of a plurality of simulated vehicles,
On the computer,
Calculating the traffic volume that occurs and disappears at any link;
Estimating a queue length in a direction intersecting with an opposite straight vehicle at an intersection on the downstream side of the link having an arbitrary period based on the calculated traffic volume;
Determining whether a signal for the link at the intersection is red in the current period and blue in the most recent period;
And a step of collecting from the link a number of vehicles corresponding to a length obtained by subtracting a predetermined length from the estimated queue length when it is determined that the condition is not satisfied. In a traffic evaluation method by a traffic evaluation device that outputs a traffic evaluation index by simulated driving of a plurality of simulated vehicles,
Calculating the traffic volume that occurs and disappears at any link;
Obtaining signal information of an intersection on the downstream side of an arbitrary link every arbitrary period;
Estimating a queue length in a direction intersecting with an opposite straight vehicle at the intersection of the cycle based on the calculated traffic volume;
Determining whether a signal for the link at the intersection is red in the current period and blue in the most recent period;
And a step of collecting from the link a number of vehicles corresponding to a length obtained by subtracting a predetermined length from the estimated queue length when it is determined that the condition is not satisfied.

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