JP2007179430A - Traffic flow control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traffic flow control system capable of flexibly responding to change in traffic volume in each advancing direction. <P>SOLUTION: The traffic flow control system 1 comprises a vehicle sensor 2 for measuring the length of a current waiting line of vehicles in each lane at an intersection X on the downstream of a two-lane road R<SB>M</SB>, a central control unit 5 for determining, based on the degree of congestion obtained from the line length in each lane, permitted advancing directions in which vehicles traveling in each lane can advance within the intersection X, and an information display board 4 for displaying information for the permitted advancing directions to the vehicles traveling in each lane. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a traffic flow control system having improved flexibility with respect to changes in traffic volume.

2. Description of the Related Art Conventionally, a traffic classification control method is known in which when a traffic volume of a vehicle traveling on a road changes, the road traffic classification is changed in accordance with the traffic change. In this conventional control method, the traffic situation is detected by sensors arranged on the road. And according to the detected traffic condition, the lane division (for example, center line etc.) comprised by LED is changed, and the number of lanes of a road is increased / decreased (for example, refer patent document 1).
JP 63-124200 A (page 2-3, FIG. 2)

  However, in the conventional control method, the number of lanes is increased by moving the center line in some sections of the road, so the number of lanes decreases at the end of the section (returns to the original number of lanes). It will be. For this reason, there is a problem that traffic congestion is likely to occur at the bottleneck at the end of the section (where the lane is decreasing). Also, if the number of lanes in the main lane is increased by moving the center line, the number of lanes in the opposite lane will be reduced accordingly, which may hinder the driving of the opposite lane and cause traffic congestion etc. There was a problem that there was.

  The present invention has been made to solve the above-described conventional problems, and an object thereof is to provide a traffic flow control system that can flexibly cope with a change in traffic volume.

  The traffic flow control system of the present invention is provided at an intersection downstream of a road having a plurality of lanes, measures the length of a queue of vehicles in each lane of the road upstream of the intersection, and queue length information of each lane A matrix length information obtaining means for obtaining a congestion degree determining means for determining a congestion degree in each lane based on the matrix length information of each lane, a congestion degree in each lane, and a lane adjacent to each lane The permitted travel direction determining means for determining the permitted travel direction in which the vehicle traveling in each lane can travel within the intersection, and information on the permitted travel direction of each lane, It has the structure provided with the information display means displayed toward the vehicle which drive | works each said lane.

  With this configuration, the degree of congestion for each lane is calculated from the current queue length of each lane at the intersection, and the degree of congestion that can proceed at present in the intersection by comparing the degree of congestion in each lane with the congestion in the adjacent lane The direction is determined. And the information of the permission advancing direction is displayed with respect to the vehicle which drive | works each lane. For example, on a road with multiple lanes, when there is a change in traffic volume for each direction of travel (eg, straight ahead, right turn, left turn, etc.), the length of the queue for each lane at the intersection downstream of the road changes. To do. In the present invention, it is possible to flexibly cope with changes in traffic volume by determining the permitted travel direction of each lane based on the congestion degree obtained from the current queue length of each lane at the intersection. it can. Moreover, in this invention, when the permission advance direction of each lane changes according to the change of traffic volume, the display of the information is only changed. Therefore, the center line is not moved and the number of lanes is not increased / decreased as in the prior art, and the vehicle traveling in the opposite lane is not obstructed, so that the occurrence of traffic congestion can be suppressed.

  In addition, the traffic flow control system of the present invention comprises traffic volume information obtaining means for measuring the number of vehicles traveling in each lane upstream of the road and obtaining traffic information for each lane, and determining the degree of congestion. The means has a configuration for determining the degree of congestion in each lane based on the matrix length information and traffic volume information of each lane.

  With this configuration, each lane can be calculated from the current congestion level obtained from the matrix length information of each lane at the intersection on the downstream side of the road and the future congestion level predicted from the traffic information of each lane on the upstream side of the road. The degree of congestion is required. By determining the permitted travel direction of each lane based on the degree of congestion thus obtained, it is possible to flexibly respond to changes in the current traffic volume while taking into account changes in the traffic volume predicted in the future. .

  Further, in the traffic flow control system of the present invention, the permission travel direction determination means determines the permitted travel direction of each lane when the congestion degree of each lane is larger than the congestion degree of the lane adjacent to each lane. A traveling direction that exists in any of the permitted traveling directions of the adjacent lanes is excluded from the permitted traveling direction of each lane.

  With this configuration, when the degree of congestion of one lane is greater than the degree of congestion of adjacent lanes, that is, when one lane is more congested than the adjacent lane, the traveling direction common to both lanes is It is excluded from the permitted traveling direction of one lane. Thus, a vehicle that is scheduled to travel in a traveling direction that is excluded from the permitted traveling direction of one lane is prompted to move from one lane to an adjacent lane, and the congestion of one lane can be reduced.

  Further, in the traffic flow control system of the present invention, the permission travel direction determination means is arranged in the permission travel direction of each lane when the congestion degree of each lane is larger than the congestion degree of the lane adjacent to each lane. A traveling direction that exists and does not exist in the permitted traveling direction of the adjacent lane is added to the permitted traveling direction of the adjacent lane.

  According to this configuration, when the congestion degree of one lane is larger than the congestion degree of the adjacent lane, that is, when one lane is more congested than the adjacent lane, the lane that exists in the one lane and the adjacent lane A traveling direction that does not exist is added to the permitted traveling direction of the adjacent lane. As a result, the vehicle scheduled to travel in the traveling direction added to the permitted traveling direction of the adjacent lane is urged to move from the one lane to the adjacent lane, and the congestion of the one lane can be reduced.

  The present invention comprises permission traveling direction determining means for determining a permitted traveling direction for each lane based on the degree of congestion obtained from the matrix length information of each lane at an intersection, and a traveling direction indicating means for displaying information on the permitted traveling direction. By providing, the traffic flow control system which has the effect that it can respond flexibly to the change of traffic volume can be provided.

  Hereinafter, a traffic flow control system according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the case of a traffic flow control system that continuously controls the flow of vehicles (traffic flow) on a road with two lanes on one side all day (24 hours) is illustrated.

  A traffic flow control system according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing an outline of a traffic flow control system according to the present embodiment, and FIG. 2 is a perspective view showing an outline of the traffic flow control system. FIG. 3 is a block diagram for explaining the configuration of the traffic flow control system.

As shown in FIGS. 1 and 2, traffic flow control system 1 of the present embodiment, the vehicle sensing unit 2 of the image type to be installed downstream of the intersection X of the main road R _M with two lanes, the main road communicate with vehicle detectors 3 of ultrasonic installed upstream of R _M, the information display panel 4 installed in the main road R _M, these vehicles sensing device 2, the vehicle sensor 3, an information display board 4 And a central control unit 5 connected to each other.

  The image-type vehicle sensing device 2 is installed at a high place near the intersection X so that, for example, a queue of vehicles waiting for signals at the intersection X can be photographed. The image-type vehicle sensing device 2 of the present embodiment includes an image sensor such as a CCD, and measures the length and head position of the queue of vehicles in each lane by processing the captured image with a computer. In addition, it is configured such that the matrix length information and the head position information of each lane can be obtained. Here, the image-type vehicle sensing device 2 corresponds to the matrix length information obtaining means of the present invention.

  In the present embodiment, as shown in FIG. 3, when the head position of the vehicle queue is more than a predetermined distance (Lm) from the stop position of the intersection X, the vehicle queue is changed to the lane change. It is treated as a wait for an interrupt, not as a signal queue. That is, only when the head position of the vehicle queue is closer than a predetermined distance from the stop position of the intersection X (for example, the position of the stop line), the length of the vehicle queue is handled as a signal queue. This reduces the erroneous handling of the interrupt queue for changing lanes as a signal queue.

Vehicle detectors 3 of ultrasonic, as can be measured the number of vehicles traveling on the main road R _M, is disposed at a predetermined position upstream of the main road R _M. The ultrasonic vehicle detector 3 according to the present embodiment includes an ultrasonic transmitter / receiver, intermittently emits ultrasonic waves from the ultrasonic transmitter / receiver toward the road surface, and reflects the reflected wave from the vehicle and the road surface. By comparing the reflected waves, the vehicle can be detected.

In this embodiment, as shown in FIGS. 1 and 2, upstream of the point of the main road R _M, Tsugumichiro R _S are joined to the main road R _M. The ultrasonic vehicle detector 3 is installed slightly downstream of the junction of the main road R _M and the sub road R _S , and measures the number of vehicles flowing into the main road R _M. It is configured so that traffic information can be obtained. Here, the ultrasonic vehicle sensor 3 corresponds to the traffic information acquisition means of the present invention.

  The information display board 4 is, for example, a road sign board using LEDs or the like, and is configured so that a road sign pattern to be displayed can be changed. The information display board 4 displays a road marking pattern indicating a permitted traveling direction (straight, right, left, etc.) in which the vehicle traveling in each lane can travel within the intersection X.

In this embodiment, as shown in FIG. 4, the information display panel 4, in accordance with the situation of the traffic of each lane of the main road R _M, of the five road marking patterns from the pattern 1 to pattern 5 Either one is displayed. Here, a road marking indicating the traveling direction of two lanes, a right lane and a left lane, is displayed on the information display board 4.

  For example, when the traffic volume in the right lane and the left lane is approximately the same (for example, when there are many straight-ahead vehicles), the road marking pattern of pattern 1 is displayed on the information display board 4. That is, in this case, the road marking pattern on the information display board 4 is not changed.

  When the pattern 1 is displayed on the information display board 4 and the traffic volume in the right lane is larger than the traffic volume in the left lane (for example, when there are many right-turn vehicles), it is displayed on the information display board 4. The road marking pattern is changed from pattern 1 to pattern 2. Even when the pattern 2 is displayed on the information display board 4, when the traffic volume in the right lane is larger than the traffic volume in the left lane (for example, when there are very many right-turn vehicles), the information display board 4 The displayed road marking pattern is changed from pattern 2 to pattern 3.

  On the other hand, when the pattern 1 is displayed on the information display board 4 and the traffic volume in the left lane is greater than the traffic volume in the right lane (for example, when there are many left turn vehicles), the information display board 4 displays the traffic volume. The road marking pattern is changed from pattern 1 to pattern 4. Even when the pattern 4 is displayed on the information display board 4, when the traffic volume in the left lane is larger than the traffic volume in the right lane (for example, when there are very many left turn vehicles), the information display board 4 The displayed road marking pattern is changed from pattern 4 to pattern 5.

  As shown in FIG. 5, the central controller 5 receives the matrix length information and head position information of each lane from the image-type vehicle sensing device 2, and the traffic information of each lane from the ultrasonic vehicle sensor 3. Is provided with an information collecting unit 6 for receiving the information. The central controller 5 also includes a matrix length table 7 in which the matrix length information received by the information collecting unit 6 is registered, a received head position table 8 in which the head position information received by the information collecting unit 6 is registered, A traffic volume table 9 in which the traffic volume information received by the information collecting unit 6 is registered is provided.

  Further, as shown in FIG. 5, the central control unit 5 includes a current congestion determination unit 10 that determines the current congestion degree of each lane from the queue length (queue length) of the vehicles in each lane, A predicted congestion degree determination unit 11 that determines the predicted congestion degree of each lane from the traffic volume (number of inflows), and a congestion degree calculation unit 12 that performs weighting processing on the current congestion degree and the predicted congestion degree to calculate the congestion degree of each lane. A pattern determining unit 13 for comparing the degree of congestion in the right lane and the degree of congestion in the left lane to determine a road marking pattern to be displayed on the information display board 4, and a pattern table 14 in which information on the determined road marking pattern is stored The information transmission unit 15 for transmitting information on the determined road marking pattern to the information display board 4 is provided.

  Here, the current congestion level determination unit 10, the predicted congestion level determination unit 11, and the congestion level calculation unit 12 of the central control device 5 correspond to the congestion level determination unit of the present invention. Moreover, the pattern determination part 13 of the central control apparatus 5 is equivalent to the permission advancing direction determination means of this invention.

  About the traffic flow control system 1 comprised as mentioned above, the operation | movement is demonstrated using FIGS.

Using traffic flow control system 1 of the embodiment of the present invention, when controlling the vehicle of the flow of the main road R _M with two lanes entering the intersection X (traffic flow) is first placed at the intersection X The image-type vehicle sensing device 2 measures the length and head position of the vehicle queue of each lane waiting for a signal at the intersection X, and obtains the queue length information and head position information of each lane (S1). ). The measurement by the image type vehicle sensor 3 is performed, for example, every 5 seconds or every 1 second. Then, the matrix length information and the head position information of each lane are transmitted from the image-type vehicle sensing device 2 to the information collecting unit 6 of the central control device 5.

Further, the main road R _M vehicle detectors 3 of the installed ultrasonic upstream of, performed the measurement of the number of vehicles in each lane entering the main road R _M, traffic information of each lane is obtained (S2). Then, the traffic information of each lane is transmitted from the ultrasonic vehicle detector 3 to the information collecting unit 6 of the central controller 5.

Also, the central control unit 5, check the contents of the main road R _M road marking pattern in the information display panel 4 of the currently displayed is performed (S3). Information on the road marking pattern currently displayed on the information display board 4 is stored in the pattern table 14 of the central controller 5.

  Then, the current congestion level determination unit 10 of the central controller 5 determines the current congestion level of each lane based on the matrix length information and the head position information of each lane (S4).

  FIG. 7 is a flowchart showing the flow of the current congestion degree determination process. As shown in FIG. 7, when determining the current congestion degree in each lane, first, the matrix length in that lane is shorter than a predetermined first threshold matrix length A1, or the head position is a predetermined threshold head. It is determined whether or not the vehicle is closer to the intersection X than the position S (S401).

  When the matrix length in the lane is shorter than the predetermined first threshold matrix length A1 or the head position is closer to the intersection X than the predetermined threshold head position S, the current congestion degree is “1”. (S402).

  On the other hand, when the matrix length is equal to or greater than the predetermined first threshold matrix length A1 and the head position is equal to or greater than the predetermined threshold head position S, the matrix length is equal to the predetermined second threshold matrix length A2 (however, , A2> A1) is determined (S403).

  When the matrix length in the lane is shorter than the predetermined second threshold matrix length A2, the current congestion level is determined to be “2” (S404). On the other hand, if the matrix length in the lane is greater than or equal to the predetermined second threshold matrix length A2, the current congestion level is determined to be “3” (S405).

  After the current congestion level is determined as described above, the predicted congestion level determination unit 11 of the central control device 5 determines the predicted congestion level of each lane based on the traffic information of each lane ( S5).

  FIG. 8 is a flowchart showing the flow of the process of determining the predicted congestion level. As shown in FIG. 8, when determining the predicted congestion level in each lane, it is first determined whether or not the number of inflows in the lane is smaller than a predetermined first threshold inflow number N1 (S501).

  When the number of inflows in the lane is smaller than the predetermined first threshold inflow number N1, the predicted congestion level is determined to be “1” (S502).

  On the other hand, when the number of inflows is equal to or greater than the predetermined first threshold inflow number N1, it is determined whether or not the number of inflows is smaller than the predetermined second threshold inflow number N2 (where N2> N1). Performed (S503).

  When the number of inflows in the lane is smaller than the predetermined second threshold inflow number N2, the predicted congestion level is determined to be “2” (S504). On the other hand, when the number of inflows in the lane is equal to or greater than the predetermined second threshold inflow number N2, the predicted congestion level is determined to be “3” (S505).

  After the determination of the predicted congestion level as described above, the congestion level calculation unit 12 of the central control device 5 performs weighting processing on the current congestion level and the predicted congestion level of each lane using the following Equation 1. Then, the congestion degree C of each lane is calculated (S6).

Congestion level C = {α × current congestion level} + {(1−α) × predicted congestion level)} (Formula 1)
Here, α is a predetermined weighting coefficient set in advance in the range of 0 ≦ α ≦ 1.

  Next, the pattern determination unit 13 of the central controller 5 determines the road marking pattern by comparing the congestion degree C between the right lane and the left lane calculated as described above (S7).

  FIG. 9 is a flowchart showing the flow of the road marking pattern determination process. As shown in FIG. 9, when determining the road marking pattern, first, a difference ΔC in the degree of congestion between the right lane and the left lane is calculated (S701). Then, it is determined whether or not the difference ΔC in the degree of congestion between the right lane and the left lane is smaller than 1 (S702).

  If the difference ΔC in the degree of congestion between the right lane and the left lane is smaller than 1, the pattern is not shifted from the currently displayed road marking pattern (S703). That is, the currently displayed road marking pattern is not changed.

  On the other hand, when the difference ΔC in the degree of congestion between the right lane and the left lane is 1 or more, it is determined whether or not the difference ΔC in the degree of congestion between the right lane and the left lane is smaller than 2 (S704).

  As a result, when the difference ΔC in the degree of congestion between the right lane and the left lane is smaller than 2, a one-step pattern shift is performed from the currently displayed road marking pattern (S705). For example, when the currently displayed road marking pattern is pattern 1 and the congestion degree of the right lane is larger than that of the left lane, one-step pattern shift is performed from pattern 1 to pattern 2 in the right direction ( (See FIG. 4). At this time, when comparing the pattern 1 and the pattern 2, the “straight forward” permitted traveling direction common to the right lane and the left lane of the pattern 1 is excluded from the permitted traveling direction of the right lane of the pattern 2.

  When the road marking pattern displayed on the information display board 4 is changed from the pattern 1 to the pattern 2 in this way, a straight vehicle traveling in the right lane (a vehicle scheduled to travel straight through the intersection X) is You are prompted to change lanes from the right lane to the left lane.

  If the difference ΔC in the degree of congestion between the right lane and the left lane is 2 or more, a two-stage pattern shift is performed from the currently displayed road marking pattern (S706). For example, when the currently displayed road marking pattern is pattern 1 and the congestion degree of the right lane is larger than that of the left lane, a two-stage pattern shift is performed from pattern 1 to pattern 3 in the right direction ( (See FIG. 4). At this time, when comparing pattern 1 and pattern 3, the "advancing" permission traveling direction common to the right lane and the left lane of pattern 1 is excluded from the permission traveling direction of the right lane of pattern 3. The permitted traveling direction of “right turn” that exists in the right lane of 1 and does not exist in the left lane is added to the permitted traveling direction of the left lane of pattern 3.

  When the road marking pattern displayed on the information display board 4 is changed from the pattern 1 to the pattern 3 in this way, a straight vehicle traveling in the right lane (a vehicle scheduled to travel straight through the intersection X) is You are prompted to change lanes from the right lane to the left lane, and right-turn vehicles (vehicles that are planning to turn right at intersection X) that are driving in the right lane also change lanes from the right lane to the left lane Prompted to do.

  Such a pattern shift is performed, for example, every 5 minutes or 2.5 minutes. As shown in FIG. 4, when the currently displayed road marking pattern is pattern 3, no pattern shift in the right direction is performed. If the currently displayed road marking pattern is pattern 5, no pattern shift in the left direction is performed.

  As described above, the road marking pattern is transmitted from the information distribution unit of the central controller 5 to the information display board, and the display on the information display board 4 is immediately changed in real time according to the congestion degree of each lane. (S8).

  According to the traffic flow control system 1 of the embodiment of the present invention, the image-type vehicle sensing device 2 that obtains the queue length information by measuring the queue length of each lane at the intersection X, and each lane. By providing the central control device 5 that determines the permitted traveling direction of each lane based on the degree of congestion obtained from the matrix length information and the information display board 4 that displays information on the permitted traveling direction, traffic for each traveling direction is provided. It is possible to flexibly respond to changes in quantity in real time.

  That is, in the traffic flow control system 1 of the present embodiment, the current congestion degree for each lane is determined from the current queue length of each lane at the intersection X, and the congestion degree of each lane is determined using the current congestion degree. Is required. Then, by comparing the degree of congestion of the right lane and the left lane, the permitted travel direction that can currently travel within the intersection X is determined, and information on the permitted travel direction is displayed for vehicles traveling in each lane.

For example, one side 2 a plurality of main road M _S, the traveling direction (e.g., straight, right turn, left turn, etc.) when a change in traffic volume for each occurs, right lane and the left lane downstream of the intersection X of the main road M _S The length of the queue changes. In the present embodiment, the road marking pattern to be displayed on the information display board 4 is determined based on the congestion degree obtained from the current queue length of each lane at the intersection X, that is, permission for each current lane. Determine the direction of travel. Thereby, it can respond flexibly to the change of the traffic volume for each traveling direction.

  Further, in the present embodiment, the road marking pattern displayed on the information display board 4 is only changed when the permitted traveling direction of each lane changes according to the change in traffic volume in each traveling direction. Therefore, the center line is not moved and the number of lanes is not increased / decreased as in the prior art, and the vehicle traveling in the opposite lane is not obstructed, so that the occurrence of traffic congestion can be suppressed.

Also, the traffic flow control system 1 of the present embodiment, by measuring the major upstream of road M _S (inflow volume from Tsugumichiro R _S was also included) flowing number of vehicles in each lane, main road M Traffic information for each lane upstream of _S is required. Thus, from the current degree of congestion obtained from queue size information for each lane in the downstream of the intersection X of the main road M _S, the predicted congestion degree predicted from traffic information of each lane upstream of the main road M _S, The degree of congestion in each lane is required. By determining the permitted travel direction of each lane based on the degree of congestion thus obtained, it is possible to respond flexibly to changes in traffic volume for each current travel direction while taking into account future predicted traffic volume changes. can do.

  In the traffic flow control system 1 of the present embodiment, for example, when the degree of congestion in the right lane is greater than the degree of congestion in the left lane, that is, when the right lane is more congested than the left lane, The traveling direction common to the lane (for example, straight traveling display) is excluded from the permitted traveling direction of the right lane. As a result, a vehicle (for example, a straight-ahead vehicle) scheduled to travel in the traveling direction excluded from the permitted traveling direction of the right lane is urged to move from the right lane to the left lane, reducing the congestion of the right lane. it can.

  In the traffic flow control system 1 according to the present embodiment, for example, when the degree of congestion in the right lane is greater than the degree of congestion in the left lane, that is, when the right lane is more congested than the left lane, the right lane A traveling direction that is present in the left lane and does not exist in the left lane (for example, a right turn display) is added to the permitted traveling direction in the left lane. As a result, a vehicle (for example, a right turn vehicle) scheduled to travel in the traveling direction added to the permitted traveling direction of the left lane is urged to move from the right lane to the left lane, reducing the congestion of the right lane. it can.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

For example, in the above description, although the number of lanes of the main road R _M has been described for the case of two-lane, the scope of the present invention is not limited to this, the number of lanes of the main lane be three or more lanes Also good.

  For example, in the above description, the traffic flow control system 1 of the present invention is used to continuously control the traffic flow all day (24 hours), but the scope of the present invention is limited to this. Instead, for example, the flow of the vehicle may be controlled only during morning and evening rush hours.

  In the above description, the example using the image type vehicle sensing device 2 as the matrix length information obtaining means has been described. However, the scope of the present invention is not limited to this, and the matrix length information obtaining means is Anything that can measure the current queue length of vehicles in each lane may be used.

  In the above description, the example using the ultrasonic vehicle sensor 3 as the traffic information acquisition means has been described. However, the scope of the present invention is not limited to this, and the traffic information acquisition means. Need only be able to measure the number of vehicles traveling in each lane.

  As described above, the traffic flow control system according to the present invention has an effect of flexibly responding to a change in traffic volume in each traveling direction in real time, and has improved traffic flexibility. Useful as a flow control system.

The top view which shows the outline of the traffic flow control system in embodiment of this invention The perspective view which shows the outline of the traffic flow control system in embodiment of this invention The top view for demonstrating the length and head position of the queue measured with a vehicle sensing device in embodiment of this invention The figure for demonstrating the road marking pattern displayed on an information display board in embodiment of this invention. The block diagram which shows the structure of the traffic flow control system in embodiment of this invention The flowchart which shows the flow of the traffic flow control in embodiment of this invention The flowchart which shows the flow of the matrix length comparison process in embodiment of this invention The flowchart which shows the flow of the inflow number comparison process in embodiment of this invention The flowchart which shows the flow of the display change process of the information board in embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traffic flow control system 2 Image-type vehicle detection apparatus 3 Ultrasonic-type vehicle detector 4 Information display board 5 Central controller 6 Information collection part 10 Present congestion degree determination part 11 Predictive congestion degree determination part 12 Congestion degree calculation part 13 Pattern determination unit 15 Information transmission unit

Claims (4)

Matrix length information obtaining means that is provided at an intersection of roads having a plurality of lanes, measures the length of a queue of vehicles in each lane of the road upstream of the intersection, and obtains matrix length information of each lane;
Based on the matrix length information of each lane, congestion degree determining means for determining the degree of congestion in each lane,
Determination of permission traveling direction for comparing the degree of congestion of each lane and the degree of congestion of the lane adjacent to each lane to determine a permission traveling direction in which a vehicle traveling in each lane can travel within the intersection. Means,
Information display means for displaying information on the permitted traveling direction of each lane toward a vehicle traveling in each lane;
A traffic flow control system characterized by comprising: Upstream of the road, it is provided with traffic information obtaining means for measuring the number of vehicles traveling in each lane and obtaining traffic information of each lane,
2. The traffic flow control system according to claim 1, wherein the congestion degree determination unit determines a congestion degree in each lane based on matrix length information and traffic volume information of each lane. The permission travel direction determination means includes:
When the congestion degree of each lane is greater than the congestion degree of the lane adjacent to each lane, the traveling direction that exists in both the permitted traveling direction of each lane and the permitted traveling direction of the adjacent lane, 3. The traffic flow control system according to claim 1, wherein the traffic flow control system is excluded from the permitted traveling direction of each lane. The permission travel direction determination means includes:
When the congestion degree of each lane is greater than the congestion degree of the lane adjacent to each lane, the traveling direction that exists in the permitted traveling direction of each lane and does not exist in the permitted traveling direction of the adjacent lane, The traffic flow control system according to any one of claims 1 to 3, wherein the traffic flow control system is added in a permitted traveling direction of an adjacent lane.

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