JP4600383B2 - Traffic signal control analyzer - Google Patents

Description

  The present invention relates to a traffic signal control analysis device that analyzes whether traffic signal control is appropriately performed at an intersection.

  As traffic signal control methods, scheduled control methods that switch prepared control patterns according to time zones and day types, sensor information from several vehicle detectors installed upstream of the intersection, etc. (vehicles) And the like, and the like are disclosed (Non-patent Document 1).

  In the various control methods, signal control parameters necessary for realizing the control are prepared, and the traffic manager sets the signal control parameters in accordance with the situation of the point to be controlled and the region.

  Conventionally, there is no device for analyzing whether or not traffic signal control is appropriate at an intersection, and the control effect is evaluated using vehicle sensor information collected by an existing center device such as a signal control device. It wasn't too much.

Indicators used for the evaluation include travel time, which is an average travel time from one point to another point, a total queue length of signal waiting vehicles on a road connected to an intersection, and the like. Conventionally, the traffic signal control by the signal control parameter is performed by comparing how much the travel time and the queue length have changed before and after the setting value of the signal control parameter is changed. Evaluated whether it was appropriate.
Masahiko Katakura et al. “Traffic Signal Guide”, Traffic Engineering Research Association, July 1994, p. 4-60

  In the conventional evaluation of the control effect using travel time as an indicator, there are usually multiple intersections in the section where travel time is measured, so is traffic signal control appropriate for each intersection? It was not possible to analyze whether.

  In addition, in evaluating the control effect using indicators such as the total queue length of traffic signals waiting on the roads connected to the intersection, only the total amount of traffic on all roads connected to the intersection is a problem. No consideration was given to the balance of traffic on multiple roads and the good or bad response to traffic conditions.

  For this reason, if the signal control parameter is set as another value, even if the traffic signal control can be appropriately performed according to the traffic situation, the traffic time indicator is improved. There was a problem that the control was often mistaken as appropriate. The above-mentioned misidentification is mainly caused by the absence of a device for analyzing traffic signal control.

  Then, an object of this invention is to provide the traffic signal control analyzer which analyzes whether traffic signal control is performed appropriately according to a traffic condition.

The traffic signal control and analysis apparatus according to the present invention includes a queue length acquisition unit for each indication that acquires a queue length of a vehicle traveling in the direction of an intersection on a road corresponding to each signal indication for at least two signal indications. , on the basis of the currently示別queue length of the acquired, have a polarization-congestion determination unit determines the presence or absence of polarized traffic congestion in the intersection, the polarized traffic jam determination means, out of the acquired current示別queue length , When at least one display-specific queue length is equal to or greater than a first threshold and at least one other display-specific queue length is equal to or less than a second threshold that is equal to or less than the first threshold. It is determined that there is uneven traffic congestion (claim 1).

  According to the present invention, the queue length is greater than or equal to the first threshold on the road corresponding to a certain signal indication and the traffic is congested, whereas the queue corresponding to another signal indication is on the queue. Since it is possible to accurately determine the traffic imbalance that the length is less than or equal to the second threshold and there is no traffic jam, that is, whether there is a partial traffic jam, distribute the split in a balanced manner to each signal display It becomes clear whether or not the traffic signal control at the intersection is appropriately performed according to the traffic situation.

Further, the traffic signal control analysis apparatus of the present invention determines whether traffic signal control at the intersection is appropriate based on a ratio determined by the uneven traffic congestion determination means within the predetermined time that there is uneven traffic congestion . It may be further have one signal control determination unit (claim 2).

According to the present invention, it is possible to automatically determine whether or not traffic signal control at the intersection is appropriately performed according to traffic conditions based on the ratio determined as having uneven traffic congestion within a predetermined time.
Thereby, for example, it is possible to quickly determine whether or not traffic signal control at a number of intersections is appropriate.

Further, the traffic signal control analyzing apparatus according to the present invention includes a traffic determination unit that determines whether there is traffic on the road corresponding to the signal display based on the acquired queue length according to the display, and the traffic determination unit. If the determination result of the presence / absence of the traffic jam is different from the previous determination result, it is possible to have a traffic jam vibration judging means for judging that the traffic jam has occurred (Claim 3 ).

  According to the present invention, it is possible to analyze whether or not a so-called traffic jam that causes or eliminates a traffic jam is generated, so that it is possible to determine whether or not a split is appropriately assigned according to traffic conditions. it can.

Further, the traffic signal control analysis apparatus of the present invention determines whether traffic signal control at the intersection is appropriate based on a ratio determined by the traffic jam vibration determination means to be traffic jam vibration within a predetermined time. It may further have a second signal control determination unit (claim 4).

According to the present invention, it is possible to automatically determine whether or not traffic signal control at the intersection is appropriately performed according to traffic conditions based on the ratio determined that there is congestion vibration within a predetermined time.
Thereby, for example, it is possible to quickly determine whether or not traffic signal control at a number of intersections is appropriate.

Further, the traffic signal control analyzer of the present invention includes split fluctuation acquisition means for acquiring split fluctuation information indicating the magnitude of split fluctuation for at least one signal indication, and the acquired queue length according to indication. based on, it may also have a traffic condition change acquiring means for acquiring traffic fluctuation information indicating the magnitude of the fluctuations in traffic conditions (claim 5).

In this case , the split fluctuation information includes at least one of a difference between a maximum value and a minimum value of the split, a standard deviation of the split, a ratio where the split is equal to the maximum value, and a ratio where the split is equal to the minimum value. One can also be used (Claim 6 ).

  According to these inventions, since it is possible to analyze the magnitude of the fluctuation of the split and the magnitude of the fluctuation of the traffic situation, it is possible to determine whether or not the split is appropriately assigned according to the fluctuation of the traffic situation. .

Further, the traffic signal control analysis apparatus of the present invention is a third signal control that determines whether traffic signal control at the intersection is appropriate based on the acquired split fluctuation information and the acquired traffic situation fluctuation information. It can also have a determination means (Claim 7 ).

According to the present invention, it is possible to automatically determine whether or not traffic signal control at the intersection is appropriately performed according to traffic conditions based on both split fluctuation information and traffic situation fluctuation information.
Thereby, for example, it is possible to quickly determine whether or not traffic signal control at a number of intersections is appropriate.

  As described above, according to the traffic signal control analysis apparatus according to the present invention, it is possible to analyze whether or not traffic signal control is appropriately performed.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic diagram showing an example of the configuration of a traffic control system including a traffic signal control analyzer according to the present invention.

  In FIG. 1, reference numeral 1 denotes a signal control device, which relates to traffic signal control such as a cycle and an offset for the traffic signal controllers 5A and 5B via the central router 3, the communication line A or B, and the terminal router 4A or 4B. While transmitting a signal control command, it has the function to receive the signal control execution information which is the operation | movement history of traffic signal controller 5A and 5B, and the sensor information measured by vehicle sensor 6Aa-6Ad and 6Ba-6Bd.

  In this case, the traffic signal controllers 5A and 5B may not operate according to the command of the signal control device 1, and may operate in cooperation with other traffic signal controllers (not shown), for example. And you may operate | move based on the constant etc. which traffic signal controller 5A or 5B has.

  In addition, the vehicle detectors 6Aa to 6Ad and 6Ba to 6Bd detect whether or not a vehicle exists in the measurement target area at every predetermined period, and the vehicle presence detection result is sent to the traffic signal controller 5A or 5B, respectively. To send.

  Then, the traffic signal controller 5A or 5B that has received the vehicle presence detection result calculates the traffic volume, occupation time, etc. at the point where each vehicle detector is installed based on the vehicle presence detection result, Sensor information including traffic volume and occupation time is transmitted to the signal control device 1 via the terminal router 4A or 4B, the communication line A or B, and the central router 3.

  Further, the vehicle detectors 6Aa to 6Ad and 6Ba to 6Bd may be directly connected to the terminal router 4A or 4B, respectively. In that case, the vehicle detection is directed to the signal control device 1 without using the traffic signal controller. A signal may be transmitted. In this case, the information transmitted to the signal control device 1 by the vehicle sensor directly connected to the terminal router 4A or 4B may be sensor information including traffic volume and occupation time.

  In addition, when the vehicle detectors 6Aa to 6Ad and 6Ba to 6Bd have a function of measuring the queue length of the vehicle, for example, like an image type vehicle detector, the queue length of the vehicle is transmitted. Also good.

  The traffic signal control analysis device 2 has a function of receiving the signal control execution information and the sensor information via the signal control device 1. The traffic signal control analysis device 2 sends the signal control execution information and sensor information from the traffic signal controllers 5A and 5B and the vehicle sensors 6Aa to 6Ad and 6Ba to 6Bd without passing through the signal control device 1. You may receive it.

  Further, the traffic signal control analyzer 2 receives the signal control command information transmitted from the signal controller 1 to the traffic signal controllers 5A and 5B instead of the signal control execution information. The signal control operation history of 5A and 5B may be acquired.

  In the present embodiment, a system configuration including two traffic signal controllers has been exemplified, but only one traffic signal controller or three or more traffic signal controllers may be used. Further, any number of vehicle detectors may be connected.

  FIG. 2 is a diagram illustrating an example of equipment installation at an intersection.

Four roads a to d are connected to the intersection A.
Here, the roads a and b are assumed to be main roads and the roads c and d are assumed to be secondary roads.

  The signal lamps 7Aa to 7Ad are installed to display the right of traffic to vehicles traveling on the roads a to d toward the intersection, and the signal lamp colors in the signal lamps 7Aa to 7Ad are traffic signal controllers. Turned on, turned off, and blinked by 5A.

  Normally, the signal lamps 7Aa and 7Ab that display the right of passage to the main road turn on and off the same signal lamp color at the same timing. Similarly, the signal lamps 7Ac and 7Ad that display the right of passage to the secondary road simultaneously turn on and off the same signal lamp color. In this case, the signal display that gives the right of traffic to the main road is the first signal display, and the signal display that gives the right of traffic to the secondary road is the second signal display.

  The vehicle detectors 6Aa to 6Ad are installed on the roads a to d, respectively, and detect a vehicle traveling toward the intersection A at each installation point. Then, the detected vehicle presence detection result is transmitted to the traffic signal controller 5A at a predetermined cycle.

  Next, a procedure of processing for determining whether or not traffic signal control at the intersection A is appropriate in the traffic signal control analyzer 2 will be described with reference to FIG. FIG. 3 is an example of a functional block configuration diagram of the traffic signal control analyzer 2 according to the present invention.

  The receiving means 201 receives sensor information measured by the vehicle sensors 6Aa to 6Ad from the signal control device 1. The received sensor information is stored in storage means (not shown) such as a memory.

  The queue length acquisition unit 211 acquires the queue length in each of the roads a to d based on the sensor information stored in the memory or the like. The queue length is based on the congestion spread obtained from the average speed calculated by multiplying the ratio of traffic volume and occupation time included in the sensor information by the effective vehicle length (detection area length + average vehicle length). It can be calculated as an estimated value. When the vehicle detectors 6Aa to 6Ad have a function of measuring the queue length, a method of acquiring the measured queue length may be used. Alternatively, the signal control device 1 may calculate a queue length by a similar method, and acquire the calculated queue length from the signal control device 1 by communication. The acquired values of the queue lengths a to d on the roads a to d are stored in storage means (not shown) such as a memory.

  Then, the queue length acquisition unit 221 for each indication indicates the maximum value of the queue lengths a and b corresponding to the first signal indication among the queue lengths a to d in the first signal indication. Get as another queue length. Similarly, the queue length acquisition unit 221 for each display acquires the maximum value of the queue lengths c and d corresponding to the second signal display as the queue length for each display in the second signal display.

  In addition, as the queue length according to display, an average value may be acquired instead of the maximum value, or a queue length of a specific road may be acquired as a representative value. Alternatively, the signal control device 1 may calculate the queue length according to indication by the same method, and acquire the calculated queue length according to indication from the signal control device 1 by communication. Then, the queue lengths for each indication in the acquired first signal indication and second signal indication are stored in storage means (not shown) such as a memory.

  Then, the uneven traffic jam judging means 231 uses the first threshold value stored in the storage means (not shown) such as a memory in advance as the queue length for each indication in the first signal indication and the second signal indication. Compared with each of the second threshold values that are less than or equal to the first threshold value, the magnitude relationship between them is determined.

  For example, if the queue length according to indication in the first signal indication is equal to or greater than a first threshold, it is determined that there is a traffic jam on the road corresponding to the first signal indication, If the queue length by indication in the signal indication is equal to or less than the second threshold value, it is determined that no traffic jam has occurred on the road corresponding to the second signal indication.

  The uneven traffic jam judging means 231 determines that traffic congestion has occurred on one of the roads corresponding to the first signal indication or the second signal indication, but no traffic jam has occurred on the other. It is determined that there is uneven traffic. On the contrary, the partial traffic jam judging means 231 determines that traffic jam has occurred on both the roads corresponding to the first signal indication or the second signal indication, or that no traffic jam has occurred on both. It is determined that there is no uneven traffic.

  In addition, when it is determined that there is uneven traffic jam by the determination, for example, a method of displaying a specific symbol or the like superimposed on a corresponding intersection on a display screen (not shown) on which a map is mounted at that time, The traffic manager can be notified by voice or the like. In addition, for example, information that associates that it is determined that there is uneven traffic jam and the time is accumulated in another database device (not shown) or the like so that the traffic manager can view it. .

  As described above, for example, the intersection A in which uneven traffic congestion is likely to occur in a specific time zone when the uneven traffic congestion determination unit 231 determines the presence or absence of the uneven traffic traffic for each period such as the time corresponding to the cycle length. It is possible to analyze the trend of traffic signal control.

  Since the uneven traffic jam is a new indicator that directly indicates that the appropriate green time is not allocated to each signal display according to the traffic situation, the traffic manager is based on the presence or absence of the uneven traffic jam Appropriateness of traffic signal control can be clearly determined.

For example, if there is a traffic jam on the road corresponding to the first signal display in a specific time zone, but there is a tendency that no traffic jam occurs on the road in the second signal display, the time zone Therefore, it can be clearly and directly known that the blue time allocated to the first signal display is insufficient.
In such a case, it is possible to clarify the improvement policy that the setting of the signal control parameter should be changed so that the blue time allocated to the first signal display becomes large in the time zone, It is very useful.

  Furthermore, in such a case, since the blue time allocated to the second signal display is too long, a green signal is displayed on the road in the second signal display even though there is no vehicle traveling toward the intersection. It is possible to clearly and directly know that there is a high possibility that so-called waste blue has occurred. Accordingly, it is possible to clarify the improvement policy that the setting of the signal control parameter should be changed so that the blue time allocated to the second signal display becomes small in the time zone, which is very useful. .

  Further, the first signal control determination unit 241 monitors whether or not the uneven traffic congestion determination unit 231 determines that there is uneven traffic congestion for every predetermined period such as a long cycle time, and within a predetermined period such as 1 week, for example. Get the percentage determined to be uneven traffic. And when the ratio determined with the acquired uneven traffic congestion exceeds a predetermined threshold set in advance, it is determined that traffic signal control at the intersection A is not appropriate.

  And, for example, the traffic signal control of the intersection A is not appropriate for the traffic manager by a method of displaying a specific symbol or the like superimposed on the corresponding intersection A on a display screen (not shown) on which a map is mounted. Can be notified. Further, for example, it can be stored in another database device (not shown) or the like that the traffic signal control at the intersection A is not appropriate so that the traffic manager can view the traffic signal.

  Since traffic signal control at intersections where uneven traffic frequently occurs is considered inappropriate, it is clear that the signal control parameters at the intersections should be improved, which is very effective.

  Thus, by having the first signal control determination means 241, it is possible to automatically determine whether or not the traffic signal control at a specific intersection is appropriate.

For example, when there are a large number of intersections to be controlled by the signal control device 1, the signal control parameters should be improved by creating a list of intersections in descending order of the ratio determined as having the uneven traffic jam. It is now more useful to be able to automatically determine the priority of intersections.
In addition, since it is possible to automatically create data in which the percentage of the unbalanced traffic over several months to several years at certain intersections is arranged in time series, for example, traffic signals can be appropriately It is possible to quickly analyze the situation that the control has been carried out, but after that it has fallen into a situation to be improved.
In that case, if the certain period coincides with the period when a large shopping center or highway, etc., built in the vicinity is constructed, the cause is that the change in traffic conditions due to the construction of the large shopping center is a factor Can also be determined directly.

  According to another aspect, the uneven traffic congestion is a new indicator that directly indicates whether or not the right of traffic is given to a person who uses the road.

  Forcing a vehicle to wait for a long time only for a vehicle that flows in from a specific direction among vehicles traveling toward an intersection is not desirable because it causes road users to feel unfair. Also from the above viewpoint, uneven traffic congestion is an index that clearly indicates the appropriateness of traffic signal control by a traffic manager, and it is important to perform traffic signal control that makes uneven traffic congestion necessary.

  As described above, by introducing the traffic signal control analysis apparatus according to the present invention, it is possible to accurately grasp whether or not there is uneven traffic congestion at an intersection, so whether or not traffic signal control should be improved accurately. It becomes possible to judge and is very useful.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings.
The system configuration and device installation are the same as in the first embodiment.

  A process for determining whether or not traffic signal control at the intersection A is appropriate in the traffic signal control analyzer 2 will be described with reference to FIG. 4 which is an example of a functional block configuration.

  The receiving means 201 receives sensor information measured by the vehicle sensors 6Aa to 6Ad from the signal control device 1. The received sensor information is stored in storage means (not shown) such as a memory.

  The queue length acquisition unit 211 acquires the queue length in each of the roads a to d based on the sensor information stored in the memory or the like as in the first embodiment. The acquired values of the queue lengths a to d on the roads a to d are stored in storage means (not shown) such as a memory.

  Similarly to the first embodiment, the queue length acquisition unit 221 for each indication indicates the queue length for each indication corresponding to the first signal indication and the waiting for each indication corresponding to the second signal indication. Get the matrix length. Then, for each period such as the time corresponding to the cycle length, the queue lengths for each indication in the first signal indication and the second signal indication are acquired and stored in storage means (not shown) such as a memory, respectively. To do.

  The traffic jam judging means 251 compares the queue length for each indication corresponding to the first signal indication stored in the memory or the like with a third threshold value stored in advance in the memory or the like, and determines the first signal indication. When the corresponding queue length according to display exceeds the third threshold, the traffic jam determination unit 251 determines that there is traffic jam in the first signal display. The traffic jam determination means 251 determines the presence or absence of traffic jams for each cycle such as a time corresponding to the cycle length, for example.

  The traffic jam vibration determination unit 252 monitors the determination result of the traffic jam determination unit 251 and determines the presence or absence of traffic jam vibration based on the difference between the previous determination result and the current determination result.

  For example, if the previous determination result in the first signal display is traffic jam and the current determination result is no traffic jam, it is determined that there is traffic jam vibration because both judgment results are different. Conversely, if there is traffic jam or no traffic jam in the previous time and this time, it is determined that there is no traffic jam vibration.

  Further, the traffic jam determination unit 251 and the traffic jam vibration determination unit 252 can determine the presence or absence of traffic jam vibration for the second signal display in the same manner as the first signal display. In this way, the traffic signal control analyzer according to the present invention can determine the presence or absence of traffic jam vibration for one or more signal indications from which the queue length can be obtained.

  And when it is determined that there is traffic jam vibration by the determination, for example, a method of displaying a specific symbol or the like superimposed on a corresponding intersection on a display screen (not shown) on which a map is mounted at that time, etc. Can notify the traffic manager. In addition, for example, information that associates that it is determined that there is traffic jam vibration and its time is stored in another database device (not shown) or the like so that the traffic manager can view it. .

  The vibration of traffic jam occurs when the blue time allocated to the signal display in which the vibration is generated is not appropriate.

  For example, when it is determined that there is no traffic jam on the roads a and b corresponding to the first signal display at a certain time, the blue time allocated to the first signal display is reduced in the next cycle. However, if the green time is made too small, the green light will be cut off before all vehicles passing through the intersection A in the first signal display in the next cycle have passed, and on the roads a and b. In many cases, a large number of vehicles may be left behind.

  As described above, when the number of remaining profits is large, a traffic jam occurs on the road a or b corresponding to the first signal display in the next cycle. When it is determined that a traffic jam has occurred on the road corresponding to the first signal display as described above, in the next cycle, the blue time allocated to the first signal display is increased to increase the traffic jam. Is solved.

  As mentioned above, by making the green time too small in response to traffic conditions, traffic jams occur on the road connected to the intersection, so the presence or absence of traffic jams is inseparable from the traffic signal control at that intersection. Stand in a relationship.

  In addition, when the blue time to be allocated is increased, if the blue time is too large, so-called wasteful blue, which continues to display a green signal after all the vehicles on the roads a and b have finished passing the intersection A, And traffic congestion is likely to occur on the intersection road c or d corresponding to the second signal display. That is, if the blue time allocated to one signal display is excessively large, this causes a traffic jam on the crossing road c or d corresponding to the other signal display.

  As mentioned above, if the green time is made too large or too small according to the traffic situation, traffic jam vibration will occur on the road connected to the intersection. Stands in an inseparable relationship with control. In addition, when the traffic jam vibration occurs, the wasteful blue is likely to occur, and therefore it is highly necessary to improve the traffic signal control at the intersection where the traffic jam vibration occurs.

  In this way, the traffic congestion vibration is a new indicator that directly indicates that an appropriate green time is not assigned to each signal display according to the traffic situation. Based on the above, it is possible to clearly determine the appropriateness of traffic signal control.

  For example, if there is congestion vibration on the road corresponding to the first signal indication in a specific time zone, the blue time allocated to each signal indication will overreact to changes in traffic conditions in the time zone. You can clearly and directly know that you are doing. In such a case, the improvement policy that the setting of the signal control parameter should be changed so that the green time allocated to each signal display gradually follows the change in traffic conditions in the time zone. It can be clarified and is very useful.

  Further, the second signal control determination unit 242 monitors whether or not the traffic jam vibration determination unit 252 determines that there is traffic jam vibration for every predetermined period such as a long cycle time. For example, within a predetermined period such as one week, Get the percentage determined to have traffic jams. And when the ratio determined with the acquired traffic jam vibration exceeds a predetermined threshold set in advance, it is determined that traffic signal control at the intersection A is not appropriate.

  And, for example, the traffic signal control of the intersection A is not appropriate for the traffic manager by a method of displaying a specific symbol or the like superimposed on the corresponding intersection A on a display screen (not shown) on which a map is mounted. Can be notified. Further, for example, it can be stored in another database device (not shown) or the like that the traffic signal control at the intersection A is not appropriate so that the traffic manager can view the traffic signal.

  Since it is considered that traffic signal control at intersections where traffic jams frequently occur is not appropriate, it becomes clear that the signal control parameters at the intersections should be improved, which is very effective.

  Further, by including the second signal control determination unit 242, it is possible to automatically determine whether or not traffic signal control at a specific intersection is appropriate.

  For example, when there are a large number of intersections to be controlled by the signal control device 1, the signal control parameters should be improved by creating a list of intersections in descending order of the ratio determined as the presence of the congestion vibration. It is now more useful to be able to automatically determine the priority of intersections.

  It is also possible to determine whether traffic signal control is appropriate based on both the presence / absence of uneven traffic congestion acquired in the first embodiment and the presence / absence of traffic congestion vibration acquired in the second embodiment. .

  If there is a vibration of traffic jams in the time zone when uneven traffic jams occur, for example, at a certain time, the blue time of the first signal display is made too long in order to eliminate traffic jams on the main road. As a result, the congestion on the main road has been resolved, but congestion has occurred on the secondary road.This time, the blue time on the second signal display has been set too long in order to eliminate the traffic on the secondary road. However, it is possible to immediately determine that there is a traffic jam on the main road and the phenomenon of repeating these has occurred.

Usually, when the traffic signal control is not appropriate, the phenomenon in which the main road and the secondary road alternately repeat congestion and non-congestion usually occurs at a cycle of about 30 minutes to 1 hour. For this reason, it is possible to monitor a cycle in which the traffic congestion state of the main road and the secondary road is switched, and analyze whether the traffic signal control is appropriate by paying attention to the cycle.
In other words, a clocking means (not shown) is separately provided for monitoring the period in which the vibration of the traffic jam occurs and the period in which the traffic situation of the main road and the secondary road is changed in the partial traffic jam, and the period is within a predetermined range (for example, Whether or not traffic signal control is appropriate can also be determined by determining whether or not it is within one hour.

  As described above, whether or not the traffic signal control is appropriate by using both the presence / absence of uneven traffic congestion acquired in the first embodiment and the presence / absence of traffic jam vibration acquired in the second embodiment. This is very useful.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described in detail with reference to the drawings.
The system configuration and device installation are the same as in the first embodiment.

  Processing for determining whether or not traffic signal control at the intersection A is appropriate in the traffic signal control analyzer 2 will be described with reference to FIG. 5 which is an example of a functional block configuration.

  The receiving unit 201 receives the signal control execution information of the traffic signal controller 5 </ b> A from the signal control device 1. Similarly, the receiving unit 201 receives sensor information measured by the vehicle sensors 6Aa to 6Ad from the signal control device 1. The received signal control execution information and sensor information are stored in storage means (not shown) such as a memory.

  The queue length acquisition unit 211 acquires the queue length in each of the roads a to d based on the sensor information stored in the memory or the like as in the first embodiment. The acquired values of the queue lengths a to d on the roads a to d are stored in storage means (not shown) such as a memory.

  Similarly to the first embodiment, the queue length acquisition unit 221 for each indication indicates the queue length for each indication corresponding to the first signal indication and the waiting for each indication corresponding to the second signal indication. Get the matrix length. Then, for each period such as the time corresponding to the cycle length, the queue lengths for each indication in the first signal indication and the second signal indication are acquired and stored in storage means (not shown) such as a memory, respectively. To do.

  The traffic condition fluctuation obtaining means 261 obtains the maximum value and the minimum value of the queue length according to the indication corresponding to the first signal indication stored in the memory or the like within the predetermined period, and calculates the difference between them as the first traffic situation. Calculated as a fluctuation value. The first traffic situation fluctuation value may be, for example, a standard deviation of the queue length according to indication corresponding to the first signal indication. In addition, the first traffic condition fluctuation value is, for example, a ratio in which the queue length by indication corresponding to the first signal indication is equal to the maximum value, or a ratio equal to the minimum value. It may be.

  Moreover, the traffic situation fluctuation | variation acquisition means 261 calculates the 2nd traffic situation fluctuation value corresponding to a 2nd signal presentation in the procedure of the method similar to a 1st signal presentation.

  The split fluctuation obtaining means 271 is a time when the right of traffic is given to the roads a and b as the first signal display from the operation history of the traffic signal controller 5A stored in the signal control execution information stored in the memory or the like. Is acquired as the first split. The first split may be, for example, a ratio of the time during which the right of passage is given to the long cycle time in which the signal lamp color display makes a round at an intersection. The first split is calculated and stored in storage means (not shown) such as a memory for each period such as time corresponding to the cycle length.

  Then, within the predetermined period, the maximum value and the minimum value of the first split for each cycle are obtained, and the difference between them (hereinafter referred to as the split fluctuation range) is calculated as the first split fluctuation value. The first split fluctuation value may be, for example, a standard deviation of the first split (hereinafter referred to as a split standard deviation).

  The first split fluctuation value is, for example, a ratio in which the first split is equal to the maximum value (hereinafter referred to as a split upper limit sticking ratio) or a ratio equal to the minimum value. (Hereinafter referred to as the split lower limit sticking rate). In addition, when the split upper limit paste ratio and the split lower limit paste ratio are large, the fluctuation of the split is small, and conversely, when the split upper limit paste ratio and the split lower limit paste ratio are small, It can be judged that the fluctuation of the split is large.

  Further, the split fluctuation obtaining unit 271 calculates a second split fluctuation value corresponding to the second signal display in the same procedure as the first signal display.

  In this way, the traffic signal control analyzer according to the present invention calculates the traffic situation fluctuation value and the split fluctuation value corresponding to the signal indication for one or a plurality of signal indications from which the queue length can be acquired. be able to.

  Then, the traffic manager and the split fluctuation value calculated at the time of calculation are displayed, for example, by superimposing them on a corresponding intersection on a display screen (not shown) equipped with a map. Can be notified. In addition, for example, information that associates the traffic condition fluctuation value and the split fluctuation value with the calculation time is accumulated in another database device (not shown) or the like so that the traffic manager can view the information. You can also.

  In this way, by browsing the calculated traffic situation fluctuation value and split fluctuation value, the traffic manager can determine whether or not the traffic signal control is appropriate.

  For example, in a predetermined period, the first traffic situation fluctuation value is large enough to exceed a predetermined third threshold, and the split fluctuation width or split standard deviation of the first signal indication is below a predetermined fourth threshold In the case where the traffic condition is small, the split hardly changes even though the traffic condition greatly changes, and it can be determined that the green time cannot be appropriately allocated according to the traffic condition change.

  Further, for example, in a predetermined period, the first traffic situation fluctuation value is large enough to exceed a predetermined third threshold, and the split upper limit sticking rate and the lower limit sticking rate of the first signal indication are predetermined fourth Even if it is large enough to exceed the threshold, the split remains stuck at the upper limit or lower limit despite the large fluctuations in traffic conditions. It can be determined that the blue time is not assigned to. Conversely, when the change in the split is large even though the change in the traffic condition is small, it can be determined that the green time is not appropriately allocated according to the change in the traffic condition.

  Thus, by comparing and analyzing the traffic situation fluctuation value and the split fluctuation value, whether or not the fluctuation of one is large while the other fluctuation is small, that is, the fluctuation is inconsistent. It can be determined whether or not.

  In addition, when it is determined by the determination that inconsistency has occurred, for example, a method of displaying a specific symbol or the like superimposed on a corresponding intersection on a display screen (not shown) on which a map is mounted at that time, etc. Can notify the traffic manager. In addition, for example, information in which it is determined that inconsistency has occurred and the time associated therewith can be stored in another database device (not shown) or the like so that the traffic manager can view it. .

  Since the combination of the traffic fluctuation value and the split fluctuation value is a new combination index for directly determining whether or not an appropriate green time is assigned to each signal display according to the traffic situation, The traffic manager can clearly determine the appropriateness of traffic signal control based on the traffic situation fluctuation value and the split fluctuation value.

  For example, when the first traffic condition fluctuation value corresponding to the first signal indication is large in a specific time zone, but the split upper limit sticking rate of the first split is large, in the time zone, Therefore, it can be clearly and directly known that the blue time allocated to the first signal display is not appropriately allocated according to the change in traffic conditions.

  Also, for example, when the fluctuation of the first traffic situation fluctuation value corresponding to the first signal indication is large in a specific time zone, but the split fluctuation width of the first split is small, Therefore, it can be clearly and directly known that the blue time allocated to the first signal display is not appropriately allocated according to the change in traffic conditions.

  In such a case, the improvement policy that the setting of the signal control parameter should be changed so that the blue time allocated to the first signal display follows the change of traffic conditions in the time zone is clarified. It is very useful.

  For example, in the above, when there is a parameter that limits the range of values that can be split in advance, traffic signal control can be performed by relaxing the limit so that the range of possible values is larger than before. It can be considered appropriate.

  Further, the third signal control determination unit 243 monitors the traffic situation fluctuation value and the split fluctuation value calculated by the traffic situation fluctuation acquisition unit 261 and the split fluctuation acquisition unit 271 every cycle of, for example, several hours, for example, for one week. The ratio at which the inconsistency of the fluctuation occurs within a predetermined period is acquired.

  When the acquired inconsistency ratio exceeds a preset threshold value, it is determined that traffic signal control at the intersection A is not appropriate.

  In this case, the traffic signal control of the intersection A is appropriate for the traffic manager by, for example, displaying a specific symbol or the like superimposed on the corresponding intersection A on a display screen (not shown) on which a map is mounted. Can be notified. Further, for example, it can be stored in another database device (not shown) or the like that the traffic signal control at the intersection A is not appropriate so that the traffic manager can view the traffic signal.

  Since traffic signal control at intersections where fluctuation mismatch frequently occurs is considered inappropriate, it becomes clear that the signal control parameters at the intersections should be improved, which is very effective.

  Thus, by having the third signal control determination means 243, it is possible to automatically determine whether or not the traffic signal control at a specific intersection is appropriate.

  Further, for example, when there are a large number of intersections to be controlled by the signal control device 1, the signal control parameters are improved by creating a list of intersections in descending order of the ratio determined to be inconsistent. This makes it possible to automatically determine priorities of intersections that should be used.

  It is also possible to determine whether traffic signal control is appropriate based on the presence or absence of traffic jam vibration acquired in the second embodiment and the split fluctuation value acquired in the third embodiment.

  For example, if the split fluctuation range is large in the time zone in which traffic jams occur, the blue time allocated according to the traffic jam, that is, the split has fluctuated more than necessary, resulting in traffic jams. It is possible to immediately determine that the vibration has occurred.

  In such a case, for example, when there is a parameter that restricts the range of possible values of the split in advance, by strengthening the restriction so that the range of possible values becomes smaller than before, It is considered that traffic jam control can be suppressed and traffic signal control can be made appropriate.

  As described above, whether or not the traffic signal control is appropriate is also determined by using both the presence / absence of traffic jam vibration acquired in the second embodiment and the split fluctuation value acquired in the third embodiment. Can be very useful.

(Fourth embodiment)
Hereinafter, a fourth embodiment of the present invention will be described in detail with reference to the drawings.
The system configuration and device installation are the same as in the first embodiment.

  FIG. 6 is an example of a functional block configuration diagram of the traffic signal control analyzer 2 according to the present invention.

  The receiving unit 201 receives the signal control execution information of the traffic signal controller 5 </ b> A from the signal control device 1. Similarly, the receiving unit 201 receives sensor information measured by the vehicle sensors 6Aa to 6Ad from the signal control device 1.

  The queue length acquisition unit 211 acquires the queue length in each of the roads a to d based on the sensor information stored in the memory or the like.

  Then, the queue length acquisition unit 221 for each indication indicates the maximum value of the queue lengths a and b corresponding to the first signal indication among the queue lengths a to d in the first signal indication. Get as another queue length. Similarly, the queue length acquisition unit 221 for each display acquires the maximum value of the queue lengths c and d corresponding to the second signal display as the queue length for each display in the second signal display.

  Then, the uneven traffic jam determination unit 231 determines the presence or absence of the uneven traffic jam as in the first embodiment. Further, the first signal control determination unit 241 acquires the ratio determined by the uneven traffic congestion determination unit 231 that there is uneven traffic congestion within a predetermined period, as in the first embodiment.

  Similar to the second embodiment, the traffic jam determination unit 251 determines whether there is traffic on each of the road corresponding to the first signal display and the road corresponding to the second signal display. Then, the traffic jam vibration determining means 252 determines the presence or absence of traffic jam vibration on each of the road corresponding to the first signal display and the road corresponding to the second signal display, as in the second embodiment.

  Further, the second signal control determination unit 242 acquires the ratio that the traffic jam vibration determination unit 252 determines that there is traffic jam vibration within a predetermined period, as in the second embodiment.

  The traffic situation fluctuation acquisition means 261 calculates traffic situation fluctuation values corresponding to the first signal presentation and the second signal presentation, respectively, as in the third embodiment. As in the third embodiment, the split fluctuation acquisition unit 271 performs the split fluctuation width, split standard deviation, split upper limit sticking rate, and split lower limit corresponding to the first signal display and the second signal display. The pricing rate is calculated respectively.

  Further, the third signal control determination unit 243 obtains the rate of occurrence of fluctuation inconsistency between the traffic situation fluctuation value and the split fluctuation value within a predetermined period, as in the third embodiment.

  The split data string acquisition unit 282 acquires the first signal display and the split in the second signal display for each cycle of the traffic signal controller 5A from the signal control execution information received by the reception unit 201, and Create a split data sequence that arranges chronologically. Note that the split data string acquisition unit 282 may acquire a split data string created by other devices such as the signal control device 1 in the same procedure through communication.

  Further, the queue length data string acquisition unit 283 for each indication indicates the queue length for each indication in the first signal indication and the second signal indication acquired by the queue length acquisition unit 221 for each cycle. Each is acquired, and a queue length data string according to display in which these are arranged in time series is created. The current queue length data string acquisition unit 283 may acquire the current queue length data string generated by other apparatuses such as the signal control apparatus 1 in the same procedure through communication.

  Then, the determination result of the presence / absence of the uneven traffic jam obtained in this way, the queue length data string for each indication, and the like are stored in a storage unit (not shown) such as a memory.

  The display means 281 reads out the created split data string and the current queue length data string from the storage unit (not shown) and displays them on the same screen in the form of a line graph or a bar graph. In this case, the display unit 281 displays the data of the period specified by the display start period and the display end period of the display period input to the display period input unit 284.

  FIG. 7 is an example of a display screen diagram displayed by the display unit 281.

  In accordance with the time displayed on the time axis 801, the generated split data string of the first signal display is displayed as a line graph 821 on the upper stage of the screen. Further, according to the time displayed on the time axis 801 and the like, the created queue length data row by indication of the first signal indication is similarly displayed as a bar graph 811 in the upper part of the screen.

  Similarly to the first signal display, according to the time displayed on the time axis 801, the created split data string line graph 822 of the second signal display and the queue length data string for each display A bar graph 812 is displayed at the bottom of the screen.

  In this way, the queue length data string for each indication for knowing the fluctuation situation of the traffic situation and the split data string for knowing the traffic signal control history can be compared and viewed in association with the time. Thus, it is possible to visually determine whether or not appropriate traffic signal control has been performed according to changes in traffic conditions, which is very useful.

  In addition, since one of the graphs is displayed as a line graph and the other is displayed as a bar graph, these can be displayed in a superimposed manner. It is very useful to compare the fluctuation status of

  Then, the information about the presence or absence of traffic jam determined by the traffic jam judging means 251 at the position between the current queue length data row and the bar graph 811 and the current queue length data row bar graph 812 is shown in FIG. Displayed in the determination area 831. In the traffic jam determination area 831, it is possible to know in which signal display the traffic jam has occurred by displaying a thick horizontal line on the signal display side corresponding to the road where the traffic jam has occurred.

  By displaying a thick horizontal line on the side of the signal display corresponding to the road where the traffic jam has occurred in the traffic jam judgment area 831, there is a partial traffic jam at the time when the traffic jam occurs only on one signal display. You can know at a glance.

  In the traffic jam determination area 831, information related to the presence / absence of the partial traffic jam determined by the traffic jam determination unit 231 may be displayed, or information related to the presence / absence of the traffic jam determined by the traffic jam vibration determination unit 252 may be displayed. . Further, these pieces of information may be displayed at the same time as necessary, or a display switching unit (not shown) for instructing switching may be separately provided, and switched according to an instruction from the switching unit. .

  In the display start region 841 and the display end region 842, a period for displaying the line graph 821 and the like can be input. An operator who operates the display screen of the traffic signal control analyzer according to the present invention inputs the display period via a human interface such as a computer mouse or keyboard.

  By entering the display period, for example, select only the data in the time zone in which it is particularly necessary to judge whether traffic signal control is appropriate, such as the time zone when traffic demand in the early morning or evening peaks. This is very useful.

  For example, the time zone data can be copied on paper by a printing device such as a printer, and the copied paper can be copied and distributed. A plurality of traffic managers discuss the appropriateness of traffic signal control. It is very useful in some cases. In addition, by specifying a specific time zone so that it can be copied on paper, an annotation can be added to the point portion on the copy paper surface.

  For example, by placing the graph in documents such as daily traffic information and daily traffic reports that report traffic signal control status, by simultaneously describing the cause that traffic congestion did not resolve for a long time and improvement points of traffic signal control, The document becomes more useful and has higher added value. Thus, for example, a person in charge of traffic administration who has browsed the document can accurately grasp the importance of advanced traffic signal control, which is very useful.

As described above, according to these inventions, it is possible to provide a traffic signal control analysis device that analyzes whether or not traffic signal control is appropriate using an indicator that accurately indicates traffic conditions. It is possible to find a non-intersection and improve it quickly.
In particular, the suitability of traffic signal control at the intersections in the city center where traffic demand is large has a great impact on the efficiency of logistics, so its social impact is great, and a device that accurately analyzes this is extremely useful. is there.

The traffic signal control analyzer according to the present invention may be realized by a single computer or a plurality of computers.
In the case of being realized by a plurality of computers, data may be transmitted and received between the plurality of computers as necessary.

  Note that the present invention is not construed as being limited to the invention shown in the embodiments, and may be other embodiments.

It is the schematic which shows an example of a structure of a traffic control system. It is the schematic which shows an example of apparatus arrangement | positioning on a road. It is a figure which shows an example of the functional block structure of a traffic signal control analyzer. It is a figure which shows an example of the functional block structure of a traffic signal control analyzer. It is a figure which shows an example of the functional block structure of a traffic signal control analyzer. It is a figure which shows an example of the functional block structure of a traffic signal control analyzer. It is a figure which shows an example of the display in the display means of a traffic signal control analyzer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Signal control apparatus 2 Traffic signal control analyzer 3 Central router 4A, 4B Terminal router 5A, 5B Traffic signal controller 6Aa-6Ad, 6Ba-6Bd Vehicle sensor 7Aa-7Ad Signal lamp 201 Reception means 211 Queue length acquisition means 221 Queue length acquisition means 231 according to indication Unbalanced congestion determination means 241 First signal control determination means 242 Second signal control determination means 243 Third signal control determination means 251 Congestion determination means 252 Congestion vibration determination means 261 Traffic situation fluctuation acquisition means 271 Split fluctuation acquisition means 281 Display means 282 Split data string acquisition means 283 Displayed queue length data string acquisition means 284 Display period input means 801 Time axis 811 Bar graph 812 of queue length data string by display of the first signal display Bar graph 821 of the queue length data string according to the indication of the second signal indication Signal aspect of the split data column line graph 822 second signal aspect of the split data column line graph 831 congestion determination area 841 displays the beginning area 842 displays the end region of the

Claims (7)

For at least two signal indications, a queue length acquisition means for each indication that acquires the queue length of the vehicle traveling in the direction of the intersection on the road corresponding to each signal indication;
Based on the acquired queue length according to presenting, a traffic signal control analysis device having a partial traffic jam judging means for judging the presence or absence of a partial traffic jam at the intersection ,
The uneven traffic judgment means
Among the acquired queue lengths by display, at least one queue length by display is greater than or equal to a first threshold, and at least one other queue length by display is less than or equal to the first threshold. Determining that there is partial traffic jam when it is below the second threshold,
A traffic signal control analyzer characterized by. Further comprising first signal control determination means for determining whether or not traffic signal control at the intersection is appropriate based on a ratio determined by the uneven traffic congestion determination means within a predetermined time period.
The traffic signal control analyzing apparatus according to claim 1 . Based on the acquired queue length according to the presenting indication, traffic jam judging means for judging the presence or absence of traffic jam on the road corresponding to the signal presenting;
Having a traffic jam vibration judging means for judging that the traffic jam vibrates when the judgment result of the presence or absence of the traffic jam by the traffic jam judging means is different from the previous judgment result;
The traffic signal control analysis apparatus according to claim 1 or 2 , characterized in that: Further comprising second signal control determination means for determining whether or not traffic signal control at the intersection is appropriate based on a ratio determined by the traffic congestion vibration determination means within a predetermined time to be traffic congestion vibration;
The traffic signal control analysis apparatus according to claim 3 . Split fluctuation acquisition means for acquiring split fluctuation information indicating the magnitude of split fluctuation for at least one signal display;
Having traffic condition fluctuation acquisition means for acquiring traffic condition fluctuation information indicating the magnitude of the fluctuation of the traffic situation based on the acquired queue length according to the present indication;
Traffic signal control analyzer according to any one of claims 1 to 4, characterized in. The split fluctuation information is
At least one of a difference between a maximum value and a minimum value of the split, a standard deviation of the split, a ratio where the split is equal to the maximum value, and a ratio where the split is equal to the minimum value;
The traffic signal control analyzer according to claim 5 . Further comprising third signal control determination means for determining whether traffic signal control at the intersection is appropriate based on the acquired split fluctuation information and the acquired traffic condition fluctuation information;
The traffic signal control analyzing apparatus according to claim 5 or 6 .

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