JP5045253B2 - Traffic signal control apparatus and method - Google Patents

Description

  The present invention relates to traffic sensitive control for switching traffic light at a plurality of intersections, and more particularly to a traffic signal control apparatus and method for performing traffic sensitive control capable of route guidance to alleviate traffic congestion.

The signal control method for traffic signals by system control and wide area control is roughly divided from the viewpoint of setting method of signal control parameters (split, cycle length, offset, etc.). There are two types of traffic sensitive control in which signal control parameters are set according to traffic conditions.
Among these, the latter traffic sensitive control is classified into terminal sensitive control performed for each traffic signal controller of the terminal and central sensitive control that changes signal control parameters for a plurality of intersections that are route system controlled or surface controlled. The

  The above-mentioned central sensitive control can be applied to a road with a large traffic volume and a large traffic volume because it can perform advanced system control and wide area control (surface control) corresponding to the traffic flow fluctuation. In such central sensitive control, program selection control that selects one program that is most suitable for the current traffic state based on vehicle sensor information, and online signal control parameters and signal display switching timing based on vehicle sensor information. By performing the program formation control to determine, it aims at the improvement of traffic processing efficiency (refer nonpatent literature 1).

"Revised Traffic Signal Guide" Editorial and publication Traffic Engineering Research Group (16-18, 83-87)

Conventionally, in a traffic control center that performs the above-mentioned central sensitivity control, when a traffic congestion section occurs in the control area, traffic information on the traffic congestion section or detour is displayed on the infrastructure-side light bulletin board, or an optical beacon or radio beacon is displayed. For example, the traffic information is transmitted to the in-vehicle device of the vehicle, or the traffic information is broadcast from a radio broadcasting station, thereby reducing traffic congestion.
However, simply by notifying the vehicle occupant of traffic jam information in this way, it is left to the decision of the vehicle occupant to decide whether or not to detour to avoid traffic jams. I could not expect so much to travel on the detour, and could not improve the effect of traffic jam suppression so much.

  The present invention has been made in view of such circumstances, and traffic signal control capable of more effectively suppressing traffic congestion by enabling traffic-sensitive control that increases the possibility of a vehicle selecting a detour. An object is to provide an apparatus and method.

The first traffic signal control device of the present invention is a traffic signal control device that performs traffic sensitivity control for setting signal control parameters so that traffic signals at a plurality of intersections are interlocked, and a traffic jam section in a control area, Storage means for storing a detour as an alternative route for the traffic jam section, and when a traffic jam occurs in the traffic jam section, the detour direction of the detour is smaller than the opposite direction to the signal waiting time. And control means for performing priority control for setting a signal control parameter for the intersection included in the detour (Claim 1).

In this case, the control means performs priority control to set the signal control parameter of the intersection included in the detour so that the detour direction of the detour is smaller in signal waiting time than the opposite direction. It is possible to increase the possibility that a vehicle traveling upstream of the inhibition intersection will travel on the detour. For this reason, compared with the case where traffic information is simply notified to the passengers of the vehicle, traffic congestion can be more effectively suppressed.

Further, the second traffic signal control device of the present invention is a traffic signal control device that performs traffic sensitivity control for setting signal control parameters so that traffic signals at a plurality of intersections are interlocked, and is a congestion section in a control area. Storage means for storing the inflow suppression intersection for the traffic jam section, and when the traffic jam occurs in the traffic jam section, the vehicle traveling upstream of the inflow suppression intersection is less likely to enter the traffic jam section. And control means for performing inflow suppression control for setting a signal control parameter for the inflow suppression intersection (Claim 2 ).
In this case, the control means performs the inflow suppression control that sets the signal control parameter of the inflow suppression intersection so that the vehicle traveling upstream of the inflow suppression intersection does not easily enter the traffic jam section. The possibility that the vehicle traveling on the side travels on the detour can be further increased. For this reason, compared with the case where traffic information is simply notified to the passengers of the vehicle, traffic congestion can be more effectively suppressed.

In the first traffic signal control apparatus of the present invention, when the storage means further stores an inflow suppression intersection for the traffic jam section, the control means travels upstream of the inflow suppression intersection. It is preferable to set the signal control parameter of the intersection included in the detour based on the proportion of the vehicles that have selected the detour among the vehicles that have been in the vehicle (claim 1 ).
In this case, since the control means sets the signal control parameter of the intersection included in the detour based on the ratio of the vehicle that has selected the detour (the detour rate), the selection of the detour according to the size of the detour is determined. It is possible to change the ease. For this reason, when the detour rate is relatively small, finer priority control such as increasing the priority to the detour is possible.

Further, in the second traffic signal control device of the present invention, when the storage means further stores a detour as an alternative route for the traffic jam section, the control means is located upstream of the inflow suppression intersection. of the vehicle which has been traveling, based on a percentage of the vehicle selects the detour path, it is preferable to set the signal control parameters of the obstruction intersection (claim 2).
In this case, since the control means sets the signal control parameter for the inflow suppression intersection based on the ratio of the vehicle that has selected the detour (the detour rate), the degree of suppression to the traffic jam section is changed according to the size of the detour rate. be able to. For this reason, when the detour rate is relatively small, finer inflow suppression control such as increasing the suppression degree to the traffic jam section is possible.

Preferably, the traffic signal billing device of the present invention further includes providing means for providing the vehicle with information indicating that the priority control or the inflow suppression control or both of them are being performed (invoice). Item 3 ).
In this case, since information indicating that the control is being performed is provided to the vehicle, the vehicle occupant can recognize in advance that priority control to the detour and inflow suppression control are being performed. For this reason, compared with the case where a passenger does not know such information, possibility that a vehicle will drive | work a detour can further be improved.

The traffic signal control method of the present invention (Claims 4 and 5 ) relates to a control method performed in the traffic signal control device (Claims 1 and 2 ), and has the same effects as the control device.

  As described above, according to the present invention, since it is possible to perform signal control that increases the possibility that the vehicle selects a detour, traffic congestion can be more effectively suppressed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[Overall system configuration]
FIG. 1 shows the overall configuration of a traffic signal control system employing the present invention.
As shown in FIG. 1, the traffic signal control system of the present embodiment includes a traffic signal 1, a vehicle-mounted device 2 (see FIG. 2), a vehicle detector 3, a central device 4, a vehicle 5 equipped with the vehicle-mounted device 2, and the like. .

Each traffic signal 1 is installed at each of a plurality of intersections Ci (i = 1 to 12), and is connected to a router 7 via a communication line 6 such as a telephone line. The router 7 is connected to a central device 4 in the traffic control center, and the central device 4 constitutes a local area network (LAN) with each traffic signal 1 at the intersection Ci in the control area.
Therefore, the central device 4 can bidirectionally communicate with each traffic signal 1, and each traffic signal 1 can also communicate bidirectionally with other traffic signals 1. The central device 4 may be installed on the road instead of the traffic control center.

The vehicle detector 3 is installed upstream of each corresponding intersection Ci in order to count the number of vehicles flowing into each intersection Ci, and is connected to each corresponding traffic signal 1 via a communication line (not shown). Yes.
In FIG. 1, for simplification of illustration, only one signal lamp 1b is depicted at each intersection Ci, but each actual intersection Ci intersects each other as shown in FIG. 2, for example. Four signal lamps 1b are installed for going up and down the road.

Further, as shown in FIG. 1, in this embodiment, the road structure of the control area under the control of the central device 4 is the main road RM in the north-south direction with a relatively large traffic volume and the east-west direction with a relatively small traffic volume. It is composed of a secondary road RS.
Further, as shown in FIG. 2, the main road RM includes a northbound up line RM1 and a southbound downline RM2, and the secondary road RS includes an eastbound upline RS1 and a westbound downline RS2. It shall be equipped with.

[Central equipment]
FIG. 3 is a block diagram showing the configuration of the central device 4.
As illustrated in FIG. 3, the central device 4 includes a control unit 401, a display unit 402, a communication unit 403, a storage unit 404, and an operation unit 405.
The control unit 401 of the central device 4 includes a workstation (WS), a personal computer (PC), and the like, and collects, processes (calculates), records, and controls signals of various traffic information from the traffic signal 1 and the vehicle detector 3. And provide information in an integrated manner. The control unit 401 of the central device 4 is connected to the hardware units via an internal bus, and also controls the operations of these units.

  The control unit 401 of the central device 4 controls the traffic signal 1 at the intersection Ci belonging to its own network with system control for adjusting a group of traffic signals on the same road, or wide area control that extends this system control to the road network. (Surface control) is performed, and traffic sensitive control is performed in which signal control parameters (split, cycle length, offset, etc.) are set according to traffic conditions.

The communication unit 403 of the central device 4 is a communication interface connected to the LAN side via the communication line 6, and transmits a signal control command S1 related to the timing of switching the color of the signal lamp 1b every predetermined time, traffic congestion information, and the like. The traffic information S2 included and the control type information S6 related to the type of traffic control performed by itself are transmitted to each traffic signal device 1.
Note that the control type identified by the control type information S6 includes priority control and inflow suppression control, which will be described later, in addition to various types of sensitive control that the central device 4 normally performs.

The signal control command S1 and the signal type information S6 are transmitted every signal control parameter calculation cycle (for example, 1.0 to 2.5 minutes), and the traffic information S2 is transmitted every five minutes, for example.
Further, the communication unit 403 of the central device 4 receives the vehicle ID, position information S3 and speed information S4 of the vehicle 5 on which the in-vehicle device 2 is mounted, and the detection of the vehicle sensor 3 from the communication unit 103 of each traffic signal device 1. The signal S5 is received in real time (for example, a period of 0.1 to 1.0 seconds).

The storage unit 404 of the central device 4 is composed of a hard disk, a semiconductor memory, and the like, and calculates a control program for performing traffic sensitive control including priority control and inflow suppression control, which will be described later, and calculation of signal control parameters used for the traffic sensitive control. Stores programs, etc.
Further, the storage unit 404 of the central device 4 includes the signal control command S1, the traffic information S2, and the control type information S6 generated by the control unit 401, the vehicle ID, the position information S3, the speed information S5, and the sensing acquired from the LAN side. The signal S5 is temporarily stored.

The display unit 402 of the central device 4 includes a road map of an area managed by the central device 4 and a display screen on which positions of all traffic signals 1 and light beacons (not shown) on the road map are displayed. It informs the central operator of traffic conditions such as traffic jams and accidents.
The operation unit 405 of the central device 4 includes an input interface such as a keyboard and a mouse. The operation unit 405 allows the central operator to perform a display switching operation on the display unit 402.

The storage unit 404 of the central device 4 has a traffic jam section 10 where traffic congestion frequently occurs in the control area, an inflow suppression intersection 11 located on the upstream side of the traffic jam section 10, and actual traffic jam in the traffic jam section 10. A detour 12 that should be used as an alternative route to the section 10 when it occurs is stored in advance.
In the example shown in FIG. 1, the up line of the main road RM in the direction from the intersection C <b> 6 to the intersection C <b> 5 is set as the congestion section 10, and the intersection C <b> 6 where the congestion section 10 starts is the inflow suppression intersection 11. A route from the intersection C6 → the intersection C2 → the intersection C1 is set in the detour 12. The detour 12 may be determined by a minimum cost route search.

  And the control part 401 of the central apparatus 4 performs the priority control to the detour 12 and the inflow suppression control to the traffic congestion area 10 in order to suppress the traffic congestion in the traffic congestion area 10 as a part of the said traffic sensitive control. The contents of this priority control and inflow suppression control will be described later.

[Traffic signal]
FIG. 2 is a schematic diagram showing the overall configuration of each traffic signal 1 included in the control area.
As shown in FIG. 2, the traffic signal 1 of this embodiment includes four signal lamps 1b installed on the upper and lower lines RM1 and RM2 of the main road and the upper and lower lines RS1 and RS2 of the secondary road, and the signal lamp 1b. And a traffic signal controller 1 a connected via a communication line 8.

The traffic signal controller 1a receives the signal control command S1 from the central device 4, and based on the signal control command S1, turns on / off each signal light such as blue, yellow, red and right turn arrow of each signal lamp 1b. Control blinking.
The traffic signal controller 1a transmits the traffic information S2 received from the central device 4 and the intersection ID stored therein to the in-vehicle device 2 at a predetermined cycle (for example, every 0.1 second). Further, the traffic signal controller 1a receives the position information S3 and the speed information S4 of the vehicle 5 from the in-vehicle device 2, and receives the detection signal S5 from the vehicle detector 5.

FIG. 4 is a block diagram showing the configuration of the traffic signal controller 1a.
As shown in FIG. 4, the traffic signal controller 1 a includes a control unit 101, a lamp driving unit 102, a wired communication unit 103, a wireless communication unit 105, and a storage unit 104.
The control unit 101 of the traffic signal controller 1a is composed of one or a plurality of microcomputers. The control unit 101 is connected to the lamp driving unit 102, the communication unit 103, and the storage unit 104 via an internal bus, and the control unit 101 controls operations of these hardware units.

The control unit 101 of the traffic signal controller 1a controls each signal lamp 1b according to a signal control command S1 that is an output as a result of the central device 4 performing traffic sensitivity control (including priority control and inflow suppression control described later). The signal lamp color of each signal lamp 1b is switched at a predetermined timing based on the command S1.
The lamp driving unit 102 includes a semiconductor relay (not shown), and corresponds to each of the blue, yellow, and red lamps of the plurality of signal lamps 1b based on the output command S1 input from the control unit 101. The AC voltage (AC 100V) or DC voltage supplied to the signal lights of each color is turned on / off.

The wired communication unit 103 of the traffic signal controller 1a is a communication interface that performs wired communication between the central device 4 and the vehicle detector 3, and the signal control command S1, traffic information S2, and The control type information S6 is received from the central device 4 and the vehicle detection signal S5 is received from the vehicle detector 3.
The wireless communication unit 105 of the traffic signal controller 1a is a communication interface that performs wireless communication with the in-vehicle device 2 of the vehicle 5 flowing into the intersection Ci, and the traffic information S2 is obtained regardless of whether or not a traffic jam occurs. The vehicle ID is transmitted to the in-vehicle device 2, and the vehicle ID, position information S 3 and speed information S 4 of the vehicle 5 are received from the in-vehicle device 2.

The wireless communication unit 105 is a medium / wide area communication device such as a wireless LAN or WiMAX (World Interoperability for Microwave Access), and can wirelessly communicate various information with the in-vehicle device 2 mounted on the vehicle 5. .
As shown in FIG. 2, the wireless communication unit 105 can communicate with the in-vehicle devices 2 of the vehicles 5 on all the roads RM1, RM2, RS1, RS2 flowing into the intersection C.

And the radio | wireless communication part 105 of this embodiment transmits link ID of the link (in the example of FIG. 2 main road RM1) with intersection ID with respect to the vehicle-mounted apparatus 2. FIG. The in-vehicle device 2 selects information necessary for itself by collating the link ID attached to the information received from the wireless communication unit 105 with the link ID of the running link. Further, the extension of the communication area of the wireless communication unit 105 (the traveling direction length of the uplink RM1) is set to about 50 to 200 m.
The storage unit 104 of the traffic signal controller 1a includes a hard disk, a semiconductor memory, and the like. The signal control command S1, the traffic information S2, the sensing signal S5 and the control type information S6 received by the wired communication unit 103, and wireless communication The unit 105 stores the vehicle ID, position information S3, speed information S4, and the like of the vehicle 5 received.

[In-vehicle device]
The in-vehicle device 2 mounted on the vehicle 5 has a communication function for wirelessly communicating various information with the traffic signal controller 1a and a navigation function for guiding to a destination set by the passenger. FIG. 5 is a block diagram showing the configuration of the in-vehicle device 2.
As illustrated in FIG. 5, the in-vehicle device 2 includes a GPS processing unit 201, an orientation sensor 202, a vehicle speed acquisition unit 203, a communication unit 204, a storage unit 205, an operation unit 206, a display unit 207, an audio output unit 208, and a processing unit 209. Etc.

The GPS processing unit 201 receives a GPS signal from a GPS satellite, and measures the position (latitude, longitude, and altitude) of the vehicle 5 based on time information, GPS satellite orbit, positioning correction information, and the like included in the GPS signal. To do.
The direction sensor 202 is constituted by an optical fiber gyro or the like, and measures the direction and angular velocity of the vehicle 5. The vehicle speed acquisition unit 203 acquires the speed data of the vehicle 5 measured by a vehicle speed sensor (not shown) detecting the angular speed of the wheels.

When the communication unit 204 of the in-vehicle device 2 enters the communication area of the wireless communication unit 105 of the traffic signal controller 1a while the vehicle 5 is traveling toward a certain intersection Ci, the traffic information S2 transmitted by the wireless communication unit 105 is transmitted. And the vehicle ID, the position information S3, and the speed information S4 are transmitted to the wireless communication unit 105 in real time (for example, in a cycle of 0.1 to 1.0 seconds).
The storage unit 205 of the in-vehicle device 2 is composed of a hard disk, a semiconductor memory, and the like, and stores the traffic information S2 received by the communication unit 204. The storage unit 205 stores road map data.

This road map data includes the intersection data that associates the intersection ID with the position of the intersection, the link ID, the link start point, the end point, and the interpolation point (corresponding to the point where the road bends), and the link start point. It consists of link data that links the link ID of the link to be connected, the link ID of the link connected to the end point of the link, and the link cost.
For example, there are as many link costs as the number of combinations of a link and its end point, and after entering the start point of the link, exit the end point of the link and enter the start point of the next link to be connected. The time required until is set. That is, the link cost includes the cost (time) required to travel from the start point to the end point of the link and the cost (time) required to travel from the end point of the link to the start point of the next link, that is, the intersection. The cost required to pass is included.

The operation unit 206 of the in-vehicle device 2 includes a touch panel, buttons, and the like, and a passenger of the vehicle 5 including a driver can set a destination.
The display unit 207 of the in-vehicle device 2 includes a monitor device (not shown) attached to the dashboard portion of the vehicle 5 and displays the image data created by the processing unit 209 to the passenger. The audio output unit 208 outputs the audio data created by the processing unit 209 from a speaker (not shown).

The processing unit 209 of the in-vehicle device 2 includes one or a plurality of microcomputers and the like, and includes a GPS processing unit 201, a direction sensor 202, a vehicle speed acquisition unit 203, a communication unit 204, a storage unit 205, an operation unit 206, and a display unit. Each process of the audio output unit 208 is controlled.
Further, the processing unit 209 includes each data of the position of the vehicle 5 measured by the GPS processing unit 201, the azimuth and angular velocity of the vehicle 5 measured by the direction sensor 202, the speed of the vehicle 5 acquired by the vehicle speed acquisition unit 203, and the storage unit 205. Based on the road map data stored in the map, the map matching process is performed to determine the position of the vehicle 5 on the road map data link.

[Priority control and inflow suppression control by central unit]
Next, priority control and inflow suppression control executed by the control unit 401 of the central apparatus 4 will be described with reference to FIGS. 1 and 6.

[Congestion judgment]
As described above, the central device 4 has a traffic jam section 10 in which traffic congestion frequently occurs in the control area, an inflow suppression intersection 12 located upstream of the traffic jam section 10, and a traffic jam in the traffic jam section 10. The detour 12 when it occurs is stored in the storage unit 404.
Therefore, the control unit 401 of the central device 4 uses the detection signal S5 from the vehicle detector 3 installed in the traffic jam section 10, the uplink information from the vehicle 5 traveling in the traffic jam section 10, and the like in the traffic jam section 10. The queue length is always detected, and by comparing this queue length with a predetermined threshold value, it is determined whether or not a congestion has occurred in the congestion section 10 (ST1 in FIG. 6).

[Priority control to detours]
Next, when the control unit 401 of the central device 4 detects the occurrence of the traffic jam in the traffic jam section 10 by the above determination, the vehicle 5 traveling on the upstream side of the inflow suppression intersection 11 can easily select the detour 12. Priority control for setting signal control parameters for the intersection Ci included in the detour 12 is performed (ST2 in FIG. 6).
Specifically, the control unit 401 of the central device 4 calculates an offset for the intersection Ci included in the detour 12 so that the detour direction of the detour 12 has priority over the opposite direction. The signal control command S1 for executing the offset is distributed to the traffic signal controller 1a at each intersection Ci included in the detour 12.
The control unit 401 of the central device 4 performs a simulation using the traffic volume in the uplink and downlink directions, and searches for an offset that minimizes the evaluation index that is a weighted sum of the link indices for each link in the uplink and downlink directions. The link index is a value obtained by adding a weight of an accident risk, which is the number of stops and the number of vehicles arriving at the intersection before and after the start of red, to the signal waiting time of the vehicle in each link.

For example, in the example shown in FIG. 1, the detour 12 corresponding to the traffic jam section 10 is a route that passes through the intersection C6 → the intersection C2 → the intersection C1.
In this case, the control unit 401 of the central device 4 has the upward direction (eastbound) which is the traveling direction of the detour 12 as compared to the downward direction (westbound) opposite to the secondary road RS passing through the intersection C6 and the intersection C2. In order to reduce the signal waiting time, an offset obtained by assigning a large priority (weight) to the uplink link index is calculated.

Similarly, the control unit 401 of the central device 4 determines that the upward direction (northbound) which is the traveling direction of the detour 12 is the opposite downward direction (southbound) with respect to the main road RM passing through the intersection C2 and the intersection C1. ) Is calculated so that a higher priority (weight) is given to the uplink link index so that the signal waiting time becomes smaller than ().
And the control part 401 of the central apparatus 4 distributes the signal control instruction | command S1 for performing the offset computed as mentioned above to the traffic signal controller 1a of the intersection C6, the intersection C2, and the intersection C1.

[Control of inflow into traffic congestion section]
Further, when the control unit 401 of the central device 4 detects the occurrence of the traffic jam in the traffic jam section 10 based on the traffic jam judgment, the vehicle 5 traveling on the upstream side of the inflow suppression intersection 11 is further prevented from entering the traffic jam section 10. Then, the inflow suppression control for setting the signal control parameter of the inflow suppression intersection 11 is performed (ST3 in FIG. 6).

Specifically, the control unit 401 of the central device 4 shortens the display length for the traffic flow that is about to enter the traffic jam section 10.
That is, taking the inflow suppression intersection 11 (intersection C6) shown in FIG. 6 as an example, the straight blue time of the up line RM1 of the main road is shortened by a predetermined time (for example, about 10 seconds) and the down line of the sub road The RS2 right turn arrow time is shortened by a predetermined time (for example, about 5 seconds), and the signal control command S1 for executing the signal display thus shortened is sent to the traffic signal controller 1a at the inflow suppression intersection 11. To deliver.
In addition, instead of shortening the display length for the traffic flow about to enter the traffic congestion section 10, the display length for the traffic flow of the intersection road (the roads RS1 and RS2 in FIG. 1) of the traffic congestion section 10 is increased. You may decide.

[Change of parameters based on detour rate]
When priority control or inflow suppression control is performed, the control unit 401 of the central device 4 is the ratio of the vehicle 5 that has selected the detour 12 among the vehicles 5 that have traveled upstream of the inflow suppression intersection 11 (hereinafter, Actually measured.
The actual measurement of the detour rate is, for example, the number of vehicles 5 communicated with the traffic signal controller 1a at the intersection Ci included in the detour 12 with respect to the number of vehicles 5 communicated with the traffic signal controller 1a at the inflow suppression intersection 11. Ratio. Further, in the case of an intersection Ci having a vehicle detector that counts the number of right-turned vehicles, the detour rate can also be measured by the ratio of the number of right-turned vehicles to the number of vehicles passing in a certain direction.

The control unit 401 of the central device 4 resets the signal control parameters for the intersection Ci included in the detour 12 and the signal parameters for the inflow suppression intersection 11 based on the actually measured detour rate.
Specifically, when the control unit 401 of the central apparatus 4 determines that the detour rate is relatively small even when priority control or inflow suppression control is being performed, the priority in the traveling direction of the detour 12 ( (Weight) is further increased to calculate an offset, and a signal control command S1 for executing the offset is distributed to the traffic signal controller 1a at the intersection C6, the intersection C2, and the intersection C1.

Further, the control unit 401 of the central device 4 further shortens the display length for the traffic flow that is about to enter the traffic jam section 10, and sends the signal control command S1 for executing this signal display to the inflow suppression intersection. 11 traffic signal controllers 1a.
Thus, according to the central device 4 of the present embodiment, since the signal control parameter used in the priority control and the inflow suppression control is changed based on the detour rate, finer priority control and inflow suppression control are performed. Can do.

[Providing information to vehicles]
When performing priority control or inflow suppression control, the control unit 401 of the central device 4 generates control type information S6 whose control type is the priority control or inflow suppression control. The communication unit 403 of the central device 4 transmits the control type information S6 to the traffic signal controller 1a at the inflow inhibition intersection 11.
Moreover, the control part 104 of the central apparatus 4 produces | generates the signal information S8 regarding the signal switching timing in the detour 12 and the route information S7 of the congestion area 10 and the detour 12 when performing priority control. The communication unit 403 of the central device 4 transmits the route information S7 and the signal information S8 to the traffic signal controller 1a of the inflow suppression intersection 11, and the signal information S8 is an intersection Ci included in the detour 12 (in the illustrated example). It is also transmitted to the traffic signal controller 1a at the intersections C2 and C1).

On the other hand, the wireless communication unit 105 of the traffic signal controller 1a at the inflow suppression intersection 11 transmits the control type information S6 whose control type is priority control or inflow suppression control to the in-vehicle device 2 of the vehicle 5 (thick arrow in FIG. 6). reference).
The in-vehicle device 2 that has received the control type information S6 notifies the passenger of the information S6 through the display unit 207 and the audio output unit 208. For this reason, the passenger of the vehicle 5 traveling toward the inflow suppression intersection 11 can detect in advance that priority control or inflow suppression control or both of them are being performed.

The wireless communication unit 105 of the traffic signal controller 1a at the intersection Ci included in the inflow suppression intersection 11 and the detour 12 transmits the route information S7 and the signal information S8 to the in-vehicle device 2 of the vehicle 5 (see thick arrows in FIG. 6). ).
The in-vehicle device 2 that has received the route information S7 and the signal information S8 notifies the passenger of the information S7 and S8 through the display unit 207 and the audio output unit 208. For this reason, the passenger of the vehicle 5 traveling toward the inflow suppression intersection 11 and the passenger of the vehicle traveling on the detour 12, the route to the detour 12 and the signal when traveling on the detour 12 The switching timing can be detected in advance, and the detour 12 can be traveled more safely and reliably.

  As a method of providing the control type information S6, the route information S7, and the signal information S8 to the in-vehicle device 2 of the vehicle 5, not only the information transmission from the traffic signal controller 1a but also the wireless communication device provided in the central device 4 It is also possible to adopt a method of transmitting directly to the vehicle 5 or transmitting to each vehicle 5 by other communication infrastructure such as an optical beacon.

According to the central device 4 of the present embodiment, when a traffic jam occurs in the traffic jam section 10, the vehicle 5 traveling on the upstream side of the inflow suppression intersection 11 can easily select the bypass route 12. Priority control for setting the signal control parameter for the included intersection Ci, or inflow for setting the signal control parameter for the inflow suppression intersection 11 so that a vehicle traveling upstream of the inflow suppression intersection 11 does not easily enter the traffic jam section 10. Since suppression control is performed, the possibility that the vehicle 5 traveling upstream of the inflow suppression intersection 11 travels on the detour 12 can be increased.
For this reason, compared with the case where traffic information is simply notified to the passengers of the vehicle, traffic congestion can be more effectively suppressed.

The embodiments disclosed thus far are all illustrative and not restrictive. The scope of the present invention is indicated by the scope of claims for patent, and all modifications within the scope equivalent to the structure of the claims for patent are included in the present invention.
For example, the present invention is not limited to the case where the central device 4 performs wide area control, and a plurality of traffic signals 1 included in the LAN perform system control or wide area control in a group unit separate from the control by the central device 4. It can also be applied to cases.
In this case, the control unit 101 of one traffic signal controller 1a in the same control group performs the priority control to the detour 12 and the inflow suppression control to the traffic jam section 10 instead of the control unit 401 of the central device 4. You can also.

It is a schematic diagram which shows the outline | summary of a traffic signal control system. It is a schematic diagram which shows the outline | summary of a traffic signal. It is a block diagram which shows the structure of a central apparatus. It is a block diagram which shows the structure of a traffic signal controller. It is a block diagram which shows the structure of a vehicle-mounted apparatus. It is a schematic diagram which shows the outline | summary of the traffic signal in an inflow suppression intersection.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traffic signal device 1a Traffic signal controller 1b Signal lamp 101 Control part 102 Lamp drive part 103 Wired communication part 104 Storage part 105 Wireless communication part 2 In-vehicle apparatus 201 GPS processing part 202 Direction sensor 203 Vehicle speed acquisition part 204 Communication part (Transmission means) )
205 storage unit 206 operation unit 207 display unit 208 audio output unit 209 processing unit 3 vehicle detector 4 central device (traffic signal control device)
401 Control unit (control means)
402 Display unit 403 Communication unit (providing means)
404 Storage unit (storage means)
405 Operation section 5 Vehicle 10 Congestion section 11 Inflow suppression intersection 12 Detour Ci Intersection S1 Signal control command S2 Traffic information S3 Location information S4 Speed information S5 Sensing signal
S6 Control type information S7 Route information S8 Signal information

Claims (5)

A traffic signal control device that performs traffic sensitivity control to set signal control parameters so that traffic signals at a plurality of intersections are linked,
Storage means for storing a traffic jam section in the control area and a detour as an alternative route of the traffic jam section;
Priority control that sets signal control parameters for the intersection included in the detour so that the detour direction of the detour is smaller than the opposite direction when traffic occurs in the traffic section And a control means for performing
The storage means further stores an inflow suppression intersection for the traffic jam section,
The control means sets the signal control parameter of the intersection included in the detour based on the ratio of the vehicle that has selected the detour among the vehicles traveling upstream of the inflow suppression intersection A traffic signal control device. A traffic signal control device that performs traffic sensitivity control to set signal control parameters so that traffic signals at a plurality of intersections are linked,
Storage means for storing a traffic jam section in the control area and an inflow suppression intersection for the traffic jam section;
Inflow suppression control is performed to set the signal control parameter of the inflow suppression intersection so that the vehicle traveling upstream of the inflow suppression intersection is less likely to enter the congestion section when traffic congestion occurs in the traffic congestion section. Control means, and
The storage means further stores a detour as an alternative route to the traffic jam section,
The control means sets the signal control parameter of the inflow suppression intersection based on a ratio of the vehicle that has selected the detour among the vehicles traveling upstream of the inflow suppression intersection. Traffic signal control device. The priority control or the obstruction control or traffic signal control apparatus according to claim 1 or 2 further comprises a providing means for providing information indicating that both of them are being implemented in the vehicle. A traffic signal control method for performing traffic sensitive control in which signal control parameters are set so that traffic signals at a plurality of intersections are linked,
A traffic jam section in the control area, a detour as an alternative to the traffic jam section, and an inflow suppression intersection for the traffic jam section ;
Priority control that sets signal control parameters for the intersection included in the detour so that the detour direction of the detour is smaller than the opposite direction when traffic occurs in the traffic section And
A signal control parameter of the intersection included in the detour is set based on a ratio of the vehicle that has selected the detour among the vehicles that have traveled upstream of the inflow suppression intersection. Traffic signal control method. A traffic signal control method for performing traffic sensitive control in which signal control parameters are set so that traffic signals at a plurality of intersections are linked,
A traffic jam section in the control area, a detour as an alternative to the traffic jam section, and an inflow suppression intersection for the traffic jam section ;
Perform inflow suppression control to set the signal control parameter of the inflow suppression intersection so that the vehicle traveling upstream of the inflow suppression intersection becomes difficult to enter the congestion section when traffic congestion occurs in the traffic congestion section ,
Traffic signal control characterized in that a signal control parameter for the inflow suppression intersection is set based on a ratio of the vehicle that has selected the detour among the vehicles that have traveled upstream of the inflow suppression intersection. Method.

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