JP6019932B2 - Traffic signal controller - Google Patents

Description

  The present invention relates to a traffic signal controller.

  In traffic signal control, a table control method is widely used in which a signal control plan for lighting each signal lamp color is created for each predetermined period (usually every cycle) and the signal lamp is controlled according to the signal control plan. ing. In this case, mainly in urban areas where there is a lot of traffic, for the purpose of facilitating traffic flow, change part or all of the signal control plan according to the traffic conditions such as traffic volume and traffic jams. A traffic signal control method for determining the timing for switching the signal color is selected.

  For example, the clearance time (yellow time + total red time) required for a vehicle that has entered the intersection beyond the stop line at the time of signal light color switching to the speed of approach of the vehicle to the stop line in advance Control is performed to adjust the clearance time based on the approach speed that is set as a pattern for each band or each day type and matches the pattern. Also, in traffic signal controllers installed at intersections with many vehicles waiting for a right turn, right turn sensitive control is performed in which a pattern for each time zone is set and the display time of the right turn blue arrow light is adjusted based on the pattern. (See Non-Patent Document 1).

"Revised Traffic Signal Guide" Editorial and publication Traffic Engineering Research Group (pages 68-72)

  In the control of the clearance time, generally, the total red time of the clearance time is controlled as a fixed time and basically does not change. Further, the clearance time is changed according to the approach speed of the vehicle to the stop line, and is not changed by other traffic elements such as the vehicle type. For this reason, the current situation is that the conventional clearance time control cannot be flexibly adapted to the actual traffic situation. For example, when a large vehicle that pulls a trailer enters the intersection, the vehicle length of the large vehicle is longer than that of the passenger vehicle, so even if the approach speeds of the large vehicle and the passenger vehicle are the same, The clearance time for safe passage is longer for large cars than for passenger cars. For this reason, in the conventional control of the clearance time, it is assumed that the clearance time is cut off before the large vehicle passes the intersection.

In the right turn sensitive control, the extension limit time (maximum extension limit) and unit extension blue time for determining the display time of the right turn blue arrow light are changed depending on the time zone, but other traffic factors such as the vehicle type Will not be changed by. For this reason, the current situation is that conventional right turn sensitive control cannot be flexibly adapted to actual traffic conditions. For example, when processing a right turn waiting vehicle including a large vehicle by right turn sensitive control, the large vehicle has a longer vehicle length and inferior acceleration performance compared to a passenger car, so the time for a large vehicle to turn right is compared to the time for a passenger car to turn right Become longer. For this reason, in the conventional right turn sensitive control, even if the display time of the right turn blue arrow light is extended, it is assumed that the right turn processing amount cannot be secured by reaching the extension limit time.
In view of such a situation, an object of the present invention is to provide a traffic signal controller capable of determining an appropriate signal lamp color switching timing corresponding to a vehicle type.

  (1) The traffic signal controller of the present invention adjusts the timing for switching the signal light color by adjusting the clearance time required for a vehicle traveling in the intersection to switch through the intersection when the signal light color is switched. In response to the speed information of the vehicle, the acquisition unit that acquires the vehicle type information or the vehicle length information, the acquired speed information, and the vehicle type information or the vehicle length information. And a time setting unit for determining the total red time of the clearance time.

  According to the traffic signal controller of the present invention, the total red time of the clearance time is determined in accordance with the vehicle type information or the vehicle length information of the vehicle in addition to the speed information of the vehicle traveling in the intersection when the signal light color is switched. Therefore, when a large vehicle travels in the intersection, the total red time can be set longer. Accordingly, it is possible to determine an appropriate signal lamp color switching timing corresponding to the type of vehicle passing through the intersection.

  (2) More specifically, in the traffic signal controller, the time setting unit is configured such that the vehicle passes the intersection based on speed information acquired by the acquisition unit and vehicle type information or vehicle length information. The intersection passing time is calculated, and the total red time is determined based on the calculated intersection passing time. In this case, a more appropriate signal lamp color switching timing can be determined.

(3) The time setting unit calculates a passing time by direction in which the vehicle passes through the intersection for each outflow direction of the intersection, and the longest passing time among the passing times by direction is passed through the intersection. Time is preferred.
In this case, since the time setting unit determines the total red time in consideration of the type of vehicle traveling in each outflow direction of the intersection, it is possible to determine a more appropriate signal lamp color switching timing.

(4) It is preferable that the time setting unit compares the intersection passing time with a preset shortest total red time, and determines the longer one as the total red time.
In this case, since the determined total red time does not become shorter than the shortest total red time, it is possible to prevent the total red time from being cut off extremely early.

(5) When the total red time is longer than the shortest total red time, the time setting unit displays a predetermined signal lamp color after the next display for the time extended with respect to the shortest total red time. It is preferable to perform a correction process that subtracts from time.
In this case, the signal lamp color switching timing can be corrected by subtracting the extended time of the total red time from the display time of the signal lamp color after the next display.

(6) From another viewpoint, the traffic signal controller according to the present invention adjusts a clearance time required for a vehicle traveling in an intersection to switch through the intersection when the signal lamp color is switched. A traffic signal controller for controlling the color switching timing, wherein a determination unit that continuously determines whether or not a vehicle is present in the intersection, and a determination unit determines that a vehicle is present A time setting unit that continues the all-red time of the clearance time and terminates the all-red time when the determination unit determines that no vehicle is present.
According to the traffic signal controller of the present invention, when there is a vehicle that travels within the intersection at the time of switching the signal light color, the all-red time of the clearance time is continued and there is no longer a vehicle traveling within the intersection. In addition, since the total red time is terminated, the total red time can be set longer when a large vehicle travels in the intersection. Accordingly, it is possible to determine an appropriate signal lamp color switching timing corresponding to the type of vehicle traveling in the intersection.

(7) It is preferable that the said time setting part continues the said all red time irrespective of the determination result of the said determination part until it reaches the preset shortest all red time.
In this case, since the total red time is continued until the shortest total red time is reached even if it is short, it is possible to prevent the total red time from being cut off extremely quickly.

(8) When the time setting unit continues the total red time longer than the shortest total red time, a predetermined signal lamp color after the next display is obtained for the time extended with respect to the shortest total red time. It is preferable to perform a correction process for subtracting from the display time.
In this case, the signal lamp color switching timing can be corrected by subtracting the extended time of the total red time from the display time of the signal lamp color after the next display.

(9) From another viewpoint, the traffic signal controller according to the present invention is configured to display the blue arrow light in the specific direction based on a detection signal of a vehicle detector that detects the presence or absence of a vehicle in a specific lane in a specific direction. A traffic signal controller that performs gap-sensitive control to adjust the vehicle, and when the vehicle sensor detects a vehicle in the dedicated lane, an acquisition unit that acquires vehicle type information or vehicle length information of the vehicle; And a time setting unit for determining an extension time limit of the gap sensitive control corresponding to the vehicle type information or the vehicle length information.
According to the traffic signal controller of the present invention, the extension limit time of the gap sensitive control is determined corresponding to the vehicle type information or the vehicle length information of the vehicle in the specific lane in the specific direction, so that the large vehicle travels in the specific direction. In this case, the extension time limit can be set longer. Accordingly, it is possible to determine an appropriate signal lamp color switching timing in accordance with the vehicle type of the vehicle in the dedicated lane in the specific direction.

(10) More specifically, in the traffic signal controller, the time setting unit is set corresponding to the vehicle type information or the vehicle length information acquired by the acquisition unit at a preset minimum extension time limit. The extension limit time is determined from the requested extension limit time obtained by adding the extended times.
In this case, a more appropriate signal lamp color switching timing can be determined.

(11) The time setting unit obtains a lane-specific request time obtained by adding the extension time to the shortest extension limit time for each of the plurality of dedicated lanes, and among these lane-specific request times, the longest lane-specific request time Is preferably the required extension time limit.
In this case, since the time setting unit determines the extension limit time in consideration of the vehicle type of the vehicle in each dedicated lane, it is possible to determine a more appropriate signal lamp color switching timing.

(12) Preferably, the time setting unit compares the required extension limit time with a preset longest extension limit time, and determines the shorter one as the extension limit time.
In this case, since the determined extension limit time does not become longer than the preset maximum extension limit time, the extension limit time can be prevented from being set extremely long.

(13) From another viewpoint, the traffic signal controller according to the present invention is configured to display the blue arrow light in the specific direction based on a detection signal of a vehicle detector that detects the presence or absence of a vehicle in a specific lane in a specific direction. A traffic signal controller for performing gap sensitive control for adjusting the vehicle type information of a subsequent vehicle or vehicle that the vehicle sensor senses next when the vehicle sensor senses a vehicle in the dedicated lane. An acquisition unit for acquiring length information; and a time setting unit for determining a unit extended blue time until the vehicle detector detects the subsequent vehicle in response to the acquired vehicle type information or vehicle length information; It is characterized by having.
According to the traffic signal controller of the present invention, the unit extended blue time until the subsequent vehicle is detected is determined according to the vehicle type information or the vehicle length information of the subsequent vehicle detected by the vehicle detector. When the succeeding vehicle is a large vehicle, the unit extended green time until the large vehicle is detected can be set longer. Accordingly, it is possible to determine an appropriate signal lamp color switching timing in accordance with the vehicle type of the vehicle in the dedicated lane in the specific direction.

  According to the present invention, it is possible to determine an appropriate signal lamp color switching timing corresponding to a vehicle type.

1 is a road plan view of a traffic signal control system including a traffic signal controller according to a first embodiment of the present invention. It is explanatory drawing of the vehicle detector of the said traffic signal control system. It is explanatory drawing which shows the specific example of the all red time setting of the clearance time by the time setting part of the said traffic signal controller. It is a flowchart which shows the procedure of the said all red time setting. It is a road top view of the traffic signal control system containing the traffic signal controller which concerns on the 3rd Embodiment of this invention. It is explanatory drawing of the vehicle detector of the said traffic signal control system. It is a flowchart which shows the procedure of the all red time setting of the clearance time by the time setting part of the traffic signal controller of FIG. It is a road top view of the traffic signal control system containing the traffic signal controller which concerns on the 5th Embodiment of this invention. It is explanatory drawing of the vehicle detector in the traffic signal control system of FIG. It is explanatory drawing which shows the specific example of the extension limit time setting of the right turn sensitive control by the time setting part of the traffic signal controller of FIG. It is a flowchart which shows the procedure of the said extension limit time setting. It is explanatory drawing which shows the specific example of the unit extension blue time setting of the right turn sensitive control by the time setting part of the traffic signal controller which concerns on the 7th Embodiment of this invention. It is a flowchart of the said unit extension blue time setting.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
[System overall configuration]
FIG. 1 is a road plan view of a traffic signal control system including a traffic signal controller according to a first embodiment of the present invention. As shown in FIG. 1, the traffic signal control system of this embodiment includes a traffic signal controller 1, a signal lamp 2, a roadside sensor 3, a central device 4 and the like of the present invention.
The number of lanes of the inflow paths L1, L3, L5, and L7 and the outflow paths L2, L4, L6, and L8 of the crossroad intersection (hereinafter simply referred to as “intersection”) IS shown in FIG. The structure of the intersection IS is not limited to that shown in FIG.

The traffic signal controller 1 is connected to a signal lamp 2 installed at an intersection IS via a power line. In the example of FIG. 1, the signal lamp 2 includes blue, yellow, and red round lamps, a right turn blue arrow lamp, a straight blue arrow lamp, and a left turn blue arrow lamp as vehicle lamps.
The traffic signal controller 1 is connected to a central device 4 in a traffic control center via a communication line such as a telephone line. The central device 4 is a traffic signal controller 1 at a plurality of intersections IS in its own jurisdiction area. And a local area network (LAN).
Accordingly, the central device 4 can communicate bidirectionally with the traffic signal controller 1, and the traffic signal controller 1 can also communicate bidirectionally with the same controller 1 at other intersections. The central device 4 may be installed on the road instead of the traffic control center.

The central device 4 performs “system control” for adjusting the traffic signal group 1 on the same road for the traffic signal controllers 1 belonging to its own jurisdiction area, or “wide area control ( Surface control) ”can be executed.
That is, the central device 4 calculates necessary traffic information for each predetermined period based on measurement information acquired from various roadside sensors for each predetermined period (for example, one minute or one cycle), and the calculated traffic information. Traffic sensitive control that sets signal control parameters (split, cycle length, offset, etc.) based on

The traffic sensitive control includes, for example, a plurality of types including MODERATO control, profile control, and the like. The central device 4 outputs a signal lamp 2 every predetermined time, which is an output of the result of the traffic sensitive control. Is transmitted to the traffic signal controller 1 every predetermined cycle (for example, 1.0 to 2.5 minutes).
In addition, the central device 4 notifies each traffic signal controller 1 in the jurisdiction area of control type information including permission / inhibition of terminal sensitive control at the intersection IS.

The traffic signal controller 1 receives from the central device 4 a signal control command that is an output of the result of traffic sensitivity control by the central device 4, and lights up each light color included in the signal lamp device 2 based on this signal control command. , Control off and flashing.
The traffic signal controller 1 is also connected to the roadside sensor 3 through a communication line. The roadside sensor 3 measures information necessary for terminal sensitive control performed by the traffic signal controller 1 at the intersection IS, and the measurement information is transmitted to the traffic signal controller 1.

[Vehicle sensor]
In the present embodiment, in order to adjust the total red time of the clearance time described later, the roadside sensor 3 is detected by a vehicle sensor that detects the vehicle 5 approaching the stop line of each lane of the inflow paths L1, L3, L5, and L7. Become.
As the vehicle detector, the camera image is processed to measure the presence / absence of the vehicle 5 in each lane, and the position, speed, and vehicle length of each vehicle 5 are measured from the image data obtained in time series. A vehicle sensor 3A of the type can be employed.
The vehicle detector 3A may measure the vehicle type instead of the vehicle length. Further, as the vehicle detector 3A, an optical sensor such as an optical beacon or a narrow area wireless communication device that receives probe information including position information, speed information, vehicle length information, or vehicle type information from a vehicle equipped with an in-vehicle device, Alternatively, an ITS radio can be adopted.

FIG. 2 is an explanatory diagram of the image type vehicle detector 3A.
As shown in FIG. 2, the image-type vehicle detector 3A has a predetermined range from the stop line in the inflow paths L1, L3, L5, and L7 to a position that is a predetermined distance (for example, 30 m) away from the stop line. By performing image processing on the camera image within the monitoring range, the presence / absence of the vehicle 5 in each straight lane, the speed of the vehicle 5 and the vehicle length can be detected in substantially real time.

[Configuration of traffic signal controller]
As shown in FIG. 1, the traffic signal controller 1 of the present embodiment includes a control unit 101, a storage unit 102, a communication unit (acquisition unit) 103, and a lamp driving unit 104 inside.
The control unit 101 includes one or a plurality of microcomputers, and is connected to the storage unit 102, the communication unit 103, and the lamp driving unit 104 via an internal bus. The control unit 101 controls operations of these hardware units.

The control unit 101 normally generates the lamp color switching timing of the signal lamp device 2 according to the signal control command determined by the central device 4 based on the traffic sensitivity control. Further, when the control type information from the central device 4 permits the terminal sensitive control, the control unit 101 performs the signal lamp according to the result of the terminal sensitive control (including the all red time setting described later) performed by the own device. The lamp color switching timing of the device 2 is generated.
The lamp driving unit 104 includes a semiconductor relay (not shown), and turns on / off the AC voltage (AC 100 V) or DC voltage supplied to each signal lamp of the signal lamp 2 based on the signal switching timing generated by the control unit 101. Turn off.

The communication unit 103 is a communication interface that performs wired communication with the central device 4 and the roadside sensor 3. Further, the communication unit 103 receives a signal control command and control type information from the central device 4 and sends them to the control unit 101 of the own device.
Further, the communication unit 103 acquires from the roadside sensor 3 traffic information (in this embodiment, detection information of the vehicle 5 in each lane of the inflow paths L1, L3, L5, and L7) necessary for terminal sensitive control performed by the own device. Then, this measurement information is transferred to the control unit 101 of the own apparatus.

The storage unit 102 includes a recording medium such as a hard disk or a semiconductor memory. The storage unit 102 has a storage area for temporarily storing various types of information (signal control commands, measurement information, etc.) received by the communication unit 103, and a computer program for executing terminal sensitive control set in the own device Storage area.
The control unit 101 performs predetermined terminal sensitivity control by reading the computer program from the storage unit 102 and processing the computer program. The control unit 101 includes a time setting unit 111 that determines the total red time of the clearance time as a functional part of the computer program.

[All red time setting for clearance time]
In the traffic signal controller 1 of the present embodiment, the time setting unit 111 of the control unit 101 performs clearance according to the speed and vehicle type of the vehicle 5 that is traveling in the intersection IS at the time of signal light color switching as terminal sensitive control. Perform “All Red Time Setting” to determine the total red time of the time.
Here, the “clearance time” is a time required for a vehicle traveling in the intersection when the signal lamp color is switched to pass through the intersection, and includes a yellow time and a total red time. “In the intersection” means the range from the stop line of each inflow path L1, L3, L5, L7 to the downstream end in the width direction at the crosswalk of the corresponding outflow paths L2, L4, L6, L8. Say.

FIG. 3 is an explanatory diagram showing a specific example of the all red time setting by the time setting unit 111. FIG. 4 is a flowchart showing the procedure for setting the total red time. Hereinafter, the all red time setting performed by the time setting unit 111 will be described with reference to these drawings.
The specific example shown in FIG. 3 shows that one passenger car 5A and one large vehicle that have entered the intersection IS from the inflow paths L1 and L5 when switching the signal lamp color for the inflow paths L1 and L5 to which the right of passage is given. 5B shows a state where the vehicle travels in the outflow directions a and b toward the outflow paths L4 and L8, respectively.

  As shown in FIG. 4, the time setting unit 111 starts the process of setting the total red time when the yellow time of the signal lamp 2 in the inflow channels L1 and L5 ends, that is, when the total red time starts. (Step ST1). First, the time setting unit 111 determines whether or not there is a vehicle traveling in the outflow directions a and b within the intersection IS (step ST2). This determination is made based on the speed of the vehicle 5 measured by each vehicle detector 3A installed in the inflow channels L1 and L5.

  Specifically, the time setting unit 111 calculates the distance from the position of the vehicle 5 imaged by the vehicle detector 3A to the stop line, and the distance to pass through the intersection IS from a preset intra-intersection distance or the like. Based on these calculated distances and the speed of the vehicle 5 at the imaging time (sensing time) of the vehicle detector 3A, the time passing through the stop line and the time passing through the intersection IS are obtained. And the time setting part 111 determines whether the vehicle 5 exists in the intersection IS at the end of yellow time based on these time. In this embodiment, as shown in FIG. 3, since the passenger car 5A and the large vehicle 5B exist in the intersection IS at the end of the yellow time, the time setting unit 111 determines that the vehicle 5 exists.

In the specific example of FIG. 3, the case where the vehicle 5 goes straight through the intersection IS is described. However, even when the vehicle 5 makes a right turn or a left turn at the intersection IS, the time setting unit 111 does the right turn or the left turn vehicle. The time when 5 passes the intersection IS is determined. At that time, the traveling direction of the vehicle 5 is continuously photographed at short time intervals (for example, 1/10 second) by the vehicle detector 3A, so that the position of the vehicle 5, vector information (traveling direction and speed), and acceleration It can be determined based on the transition.
The traveling direction of the vehicle 5 is determined to be a right turn if the vehicle 5 imaged by the vehicle detector 3A is located on the right turn lane, and the imaged vehicle 5 is located on the straight lane. In this case, it can be determined that the vehicle goes straight. Also, in the case of a lane that combines left turn and straight travel, if the speed of the vehicle 5 is equal to or higher than a predetermined speed (for example, 20 km / h), it is determined that the vehicle travels straight. Can be determined. Judgment of traffic jams can be made by existing traffic functions at the traffic control center or when the occupancy rate of detectors (commonly known as clogging detection sensors) installed at the outflow portion is increased.
Furthermore, the traveling direction of the vehicle 5 can also be determined based on whether the right turn or left turn turn signal of the vehicle 5 taken by the vehicle detector 3A is lit.

Next, the time setting unit 111 calculates “direction-specific transit times CR1, CR2” in which the vehicles 5A, 5B pass the intersection IS for each outflow direction a, b (step ST3). The direction-specific transit times CR1 and CR2 are calculated by the following formulas (1) and (2) based on the positions of the vehicles 5A and 5B, the speeds V1 and V2 and the vehicle lengths Lc1 and Lc2 measured by the vehicle detector 3A. Is done.
CR1 = (D1 + Lc1) / V1 (1)
CR2 = (D2 + Lc2) / V2 (2)
Here, D1 and D2 are distances from the positions where the vehicles 5A and 5B exist to the intersection IS, and are values calculated from the positions where the vehicles 5A and 5B are measured by the vehicle detector 3A. .
In this embodiment, for convenience of explanation, V1 = V2 (for example, 9 m / sec) and D1 = D2 (for example, 29 m), the vehicle length Lc1 of the passenger car 5A is, for example, 5 m, and the vehicle length Lc2 of the large vehicle 5B is, for example, 10 m. . Therefore, the direction-specific passage time CR1 in the outflow direction a is CR1 = (29 + 5) /9≈3.78 seconds from the above equation (1), and the direction-by-direction passage time CR2 is from the above equation (1). CR1 = (29 + 10) /9≈4.33 seconds.

  Next, the time setting unit 111 determines the longest passage time by direction among the passage times CR1 and CR2 calculated for the outflow directions a and b as the “intersection passage time CR” (step ST4). In the present embodiment, V1 = V2 and D1 = D2 as described above, but the passage time CR2 in the outflow direction b by the amount that the vehicle length Lc2 of the large vehicle 5B is longer than the vehicle length Lc1 of the passenger car 5A ( 4.33 seconds) is longer than the direction-specific transit time CR1 (3.78 seconds) in the outflow direction a. Accordingly, the time setting unit 111 sets the crossing time CR2 in the outflow direction b as the crossing time CR.

Next, the time setting unit 111 compares the intersection transit time CR with a preset “shortest total red time Rp” (for example, 3 seconds), and determines the longer one as the “total red time R”. (Step ST5. In this embodiment, since the intersection passage time CR (4.33 seconds) is longer than the shortest all red time Rp (3 seconds), the intersection passage time CR is determined as the all red time R. If it is determined in step ST2 that no vehicle is present in the intersection IS, the total red time R is set as the shortest total red time Rp (step ST11).
The total red time R is preferably controlled in units of 0.1 seconds in order to prevent erroneous determination. Further, since it is not preferable to unnecessarily extend the total red time R from the viewpoint of smoothness of signal control, the total red time R is limited to 1.5 to 2.0 times the shortest total red time Rp. Is preferred.

  Next, the time setting unit 111 determines whether or not the determined total red time R is longer than the shortest total red time Rp (step ST6). When the determined total red time R is longer than the shortest total red time Rp, the time setting unit 111 extends the amount of time extended relative to the shortest total red time Rp (R−Rp = 4.33-3 = 1.33). Second) is subtracted from the display time of a predetermined signal lamp color after the next display (step ST7). For example, the extended time can be subtracted from the variable step of the next display, the same display of the next cycle, or a plurality of variable steps. On the other hand, if it is determined in step ST6 that the determined total red time R is equal to or shorter than the shortest total red time Rp, the extension limit time setting process is terminated without performing the correction process.

  As described above, according to the traffic signal controller 1 according to the present embodiment, based on the speed and length of the vehicle 5 traveling in the intersection IS, the intersection passage time CR through which the vehicle 5 passes the intersection IS is calculated. Since the total red time R of the clearance time is determined on the basis of the calculated intersection passage time CR, the total red time R can be set longer when a large vehicle travels in the intersection IS. Accordingly, it is possible to determine an appropriate signal lamp color switching timing corresponding to the vehicle type of the vehicle 5 traveling in the intersection IS.

  The longest passing time CR1 and CR2 of the vehicle 5 calculated for each of the outflow directions a and b of the intersection IS is defined as the intersection passing time CR. Since the time R is determined, the total red time R can be determined in consideration of the vehicle type of the vehicle 5 traveling in the outflow directions a and b of the intersection IS. As a result, a more appropriate signal lamp color switching timing can be determined.

Further, since the intersection transit time CR is compared with the preset shortest total red time Rp and the longer time is determined as the total red time R, the determined total red time R is the shortest total red time R. It will not be shorter than Rp. Thereby, it is possible to prevent the total red time R from being cut off extremely quickly.
Further, when the total red time R is longer than the shortest total red time Rp, the time extended with respect to the shortest total red time Rp is subtracted from the display time of a predetermined signal lamp color after the next display. The signal lamp color switching timing can be corrected.

  In the present embodiment, the control unit 101 (time setting unit 111) of the traffic signal controller 1 performs the all red time setting, but the control unit of the central device 4 performs the all red time setting. Also good. That is, the central device 4 may execute these control processes to set the total red time R of the clearance time, and transmit a control command based on the setting result to the traffic signal controller 1.

[Second Embodiment]
The first embodiment employs an image type as the vehicle detector 3 </ b> A, but the second embodiment of the present invention employs an ITS radio as the vehicle detector 3. In other words, in the present embodiment, the vehicle detector 3 includes position information, speed information, and a vehicle length included in probe information received from a vehicle 5 (hereinafter, simply referred to as “vehicle” in this embodiment) equipped with an in-vehicle device. Based on the information and history information of the traveling direction information, the “all red time setting” of the clearance time is performed. Since other configurations of the present embodiment are the same as those of the first embodiment, description thereof is omitted.

The procedure for setting the all-red time in this embodiment is the same as the flowchart shown in FIG. 4 in the first embodiment described above, but the specific processing procedure in steps ST2 and ST3 is different from that in the first embodiment. . Hereinafter, the processing procedure of steps ST2 and ST3 will be described.
In step ST2, the time setting unit 111 determines whether there is a vehicle traveling in the outflow directions a and b within the intersection IS. This determination is performed based on the probe information received from the vehicle 5 by each vehicle detector 3A installed in the inflow channels L1 and L5.

  Specifically, the time setting unit 111 is based on position information included in the probe information received by the vehicle detector 3A from the vehicle 5 traveling on the inflow paths L1 and L5, and road map information provided in advance. The distance from the travel position of the vehicle 5 to the stop line and the distance to pass through the intersection IS are calculated. Based on the calculated distance and the speed information of the vehicle 5 at the time when the vehicle detector 3A receives the probe information, the time when the vehicle 5 passes the stop line and the time when it passes the intersection IS are obtained. Then, based on these times, it is determined whether or not the vehicle 5 exists in the intersection IS at the end of the yellow time. In this embodiment, as shown in FIG. 3, since the passenger car 5A and the large vehicle 5B exist in the intersection IS at the end of the yellow time, the time setting unit 111 determines that the vehicle 5 exists.

The traveling direction of the vehicle 5 is determined based on the position information and the road map information to determine whether the vehicle 5 is located in a right-turn exclusive lane or a straight-ahead lane. Can be determined.
Further, when the vehicle 5 is located in a lane where left turn and straight travel are combined, if the speed information is a predetermined speed (for example, 20 km / h) or more, it is determined that the vehicle travels straight. If so, it can be determined to be a left turn. Judgment of traffic jams can be made by existing traffic functions at the traffic control center or when the occupancy rate of detectors (commonly known as clogging detection sensors) installed at the outflow portion is increased.

Next, in step ST3, the time setting unit 111 calculates “direction-specific transit times CR1, CR2” in which the vehicles 5A, 5B pass the intersection IS for each outflow direction a, b. The direction-specific transit times CR1 and CR2 are based on the position information, speed information and vehicle length information included in each probe information received by the vehicle detector 3A from the vehicles 5A and 5B, as in the first embodiment. Calculated by equations (1) and (2).
As mentioned above, also in this embodiment, there exists an effect similar to 1st Embodiment.

[Third Embodiment]
FIG. 5 is a road plan view of a traffic signal control system including a traffic signal controller according to the third embodiment of the present invention. The present embodiment is a modification of the first embodiment, and differs from the first embodiment in that the configuration of the vehicle detector 3, the control unit 101, and the processing content of the all red time setting by the time setting unit 111 are different. Is different. Note that other configurations of the present embodiment are the same as those of the first embodiment, and thus the description thereof is omitted. The control unit 101 of the present embodiment continuously determines whether or not the vehicle 5 exists in the intersection IS based on the time setting unit 111 that determines the total red time of the clearance time and the detection result of the vehicle detector 3. And a determination unit 112 for determination.

  FIG. 6 is an explanatory diagram of the vehicle sensor of the present embodiment. The vehicle detector of the present embodiment detects only the presence or absence of the vehicle 5 in the intersection IS. The entire vehicle in the intersection IS is set as a monitoring range, and the camera image in the monitoring range is image-processed, whereby the vehicle An image-type vehicle detector 3A that measures the presence or absence of 5 can be employed. The vehicle detector 3A is installed at a high place in a building adjacent to the intersection IS, for example. In addition, as the vehicle detector 3A of the present embodiment, other vehicle detectors such as a far-infrared vehicle detector may be employed as long as the presence or absence of the vehicle 5 in the intersection IS can be detected.

FIG. 7 is a flowchart showing a procedure for setting the all red time of the clearance time by the time setting unit 111 of the traffic signal controller 1. Hereinafter, with reference to FIG. 6 and FIG. 7, the setting of the total red time of the clearance time performed by the time setting unit 111 of the present embodiment will be described.
FIG. 6 shows a specific example of the all red time setting of the present embodiment. When the signal lamp color is switched for the inflow paths L1 and L5 to which the right of passage is given, the vehicle enters the intersection IS from the inflow paths L1 and L5. The one passenger car 5A and one large car 5B are traveling in the outflow directions a and b toward the outflow paths L4 and L8, respectively.

As shown in FIG. 7, the time setting unit 111 starts the process of setting the total red time when the yellow time of the signal lamp 2 in the inflow channels L1 and L5 ends, that is, when the total red time starts. (Step ST1). First, in the determination unit 112, the vehicle detector 3A continuously measures whether or not there is a vehicle traveling in the outflow directions a and b by measuring the presence or absence of the vehicle in the intersection IS. (Step ST2). In the present embodiment, as shown in FIG. 6, since there are a passenger car 5A and a large vehicle 5B in the intersection IS, the determination unit 112 does not exist until the vehicles 5A and 5B pass the intersection IS. Continue to determine that
On the other hand, when the determination unit 112 determines that no vehicle is present in the intersection IS, the time setting unit 111 determines the preset shortest total red time Rp as the total red time R (step ST11), which will be described later. The process proceeds to step ST5.

  In step ST2, the time setting unit 111 continues the all red time R while the determination unit 112 determines that a vehicle is present in the intersection IS (step ST3). While continuing the total red time R, the determination unit 112 continuously determines whether or not there is no vehicle traveling in the outflow directions a and b in the intersection IS (step ST4). When the vehicles 5A and 5B in the intersection IS pass through the intersection IS and the determination unit 112 determines that the vehicles 5A and 5B do not exist in the intersection IS, the time setting unit 111 sets the total red time R to be the shortest all It is determined whether or not the red time Rp has elapsed (step ST5).

  When the total red time R has already passed the shortest total red time Rp, the time setting unit 111 terminates the total red time R (step ST6). On the other hand, when the total red time R has not passed the shortest total red time Rp, the time setting unit 111 continues the total red time R until the shortest total red time Rp has passed, and the shortest total red time Rp has passed. Sometimes the total red time R is cut off (step ST6). Thereby, irrespective of the determination result of step ST4, the total red time R can be continued until the shortest total red time Rp is reached.

  Next, the time setting unit 111 determines whether or not the total red time R is continued longer than the shortest total red time Rp (step ST7). When the total red time R is continued longer than the shortest total red time Rp, the time (R-Rp) extended from the shortest total red time Rp is displayed for a predetermined signal lamp color after the next display. Correction processing for subtracting from time is performed (step ST8). For example, the extended time can be subtracted from the variable step of the next display, the same display of the next cycle, or a plurality of variable steps. On the other hand, if it is determined in step ST7 that the total red time R is cut off at the shortest total red time Rp, the time setting unit 111 ends the processing for setting the total red time without performing the correction process.

As described above, according to the traffic signal controller 1 according to the present embodiment, when there is a vehicle 5 that travels in the intersection IS at the time of signal light color switching when the signal light color is switched, the total red time R of the clearance time is continued. When the vehicle 5 traveling in the intersection IS no longer exists, the total red time R is terminated. Therefore, when a large vehicle travels in the intersection IS, the total red time R can be set longer. Accordingly, it is possible to determine an appropriate signal lamp color switching timing in accordance with the type of vehicle traveling in the intersection IS.
In addition, the all red time setting of the present embodiment determines the continuation / canceling of the total red time R depending on whether or not there is a vehicle 5 traveling in the intersection IS when the signal light color is switched. Compared with the case where the vehicle 5 traveling in the intersection IS predicts the intersection passage time CR passing through the intersection IS and sets the total red time R as in the all-red time setting of the embodiment, it is more appropriate. The switching timing of the signal lamp color can be determined.

Regardless of whether or not there is a vehicle 5 traveling in the intersection IS, the total red time R is continued until the preset shortest total red time Rp is reached, so that the total red time is terminated extremely early. Can be prevented.
In addition, when the total red time R continues longer than the shortest total red time Rp, the time extended with respect to the shortest total red time Rp is subtracted from the display time of the predetermined signal lamp color after the next display. Therefore, the signal lamp color switching timing can be corrected.

  In the present embodiment, the control unit 101 (time setting unit 111) of the traffic signal controller 1 performs the all red time setting, but the control unit of the central device 4 performs the all red time setting. Also good. That is, the central device 4 may execute these control processes to set the total red time R of the clearance time, and transmit a control command based on the setting result to the traffic signal controller 1.

[Fourth Embodiment]
In the third embodiment, an image type is used as a vehicle detector 3A for determining the presence of a vehicle in an intersection. However, in the fourth embodiment of the present invention, an ITS radio is used as the vehicle detector 3. Yes. That is, in the present embodiment, the vehicle sensor 3 has high-accuracy position information and speed information included in probe information received from a vehicle 5 (hereinafter simply referred to as “vehicle” in this embodiment) on which an in-vehicle device is mounted. Based on the above, the “all red time setting” of the clearance time is performed. Since other configurations of the present embodiment are the same as those of the first embodiment, description thereof is omitted.

The procedure for setting the all-red time in this embodiment is the same as the flowchart shown in FIG. 7 in the third embodiment described above, but the specific processing procedure in step ST2 is different from that in the first embodiment. Hereinafter, the processing procedure of step ST2 will be described.
In step ST2, the time setting unit 111 determines whether or not there is a vehicle traveling in the intersection IS. This determination is performed based on the probe information received from the vehicle 5 by each vehicle detector 3A installed near the intersection.

Specifically, the time setting unit 111 includes high-accuracy position information included in the probe information received from the vehicle 5 by the vehicle detector 3A and position information within the intersection (latitude and longitude within the stop line at the intersection). Based on the information), it is determined whether or not the traveling position of the vehicle 5 is within the intersection at the red time R. This determination is made with a short period (for example, a period of 0.1 second), and the necessity of extending the red time is always determined. That is, as long as there is a vehicle at the intersection within the red time R, the red time R is extended to a certain limit.
As mentioned above, also in this embodiment, there exists an effect similar to 3rd Embodiment.

[Fifth Embodiment]
FIG. 8 is a road plan view of a traffic signal control system including a traffic signal controller according to the fifth embodiment of the present invention. In the traffic signal controller 1 of the present embodiment, when the time setting unit 111 of the control unit 101 executes the right turn sensitive control that is representative of the gap sensitive control as the terminal sensitive control, the right turn sensitive control of the right turn vehicle is performed. Perform "Extension limit time setting" to determine the extension limit time (maximum extension limit) according to the vehicle type. Here, “right turn sensitive control” refers to extending the display time of the right turn blue arrow light based on the detection signal of the vehicle detector that detects the presence of a right turn vehicle in the right turn lane (a lane dedicated to a specific direction). Control to adjust. The “extension limit time” is the maximum value for displaying the right turn blue arrow light. In this embodiment and the sixth to eighth embodiments to be described later, an embodiment based on right turn sensitive control is shown, but with a similar mechanism, a gap when a straight lane or a left turn lane is a dedicated lane in the characteristic direction. It can also be applied to sensitive control.

In the present embodiment, in order to adjust the extension limit time of the right turn sensitive control, the roadside sensor 3 includes a vehicle sensor that detects the right turn vehicle 5 traveling in the right turn exclusive lane of the inflow paths L1, L3, L5, and L7.
As the vehicle detector, an ultrasonic vehicle detector 3A that measures the presence / absence of the right turn vehicle 5 in the right turn lane by processing the camera image, and an image type that measures the vehicle type or the vehicle length of the right turn vehicle 5 are used. A vehicle detector 3B can be employed.

FIG. 9A is an explanatory diagram of the ultrasonic vehicle sensor 3A, and FIG. 9B is an explanatory diagram of the image type vehicle sensor 3B. As shown in FIG. 9 (a), the ultrasonic vehicle detector 3A irradiates a predetermined location near the entrance of the right-turn exclusive lane at predetermined intervals to determine whether the reflected wave from the right-turn vehicle 5 is received. To detect the presence or absence of the right turn vehicle 5. Therefore, the ultrasonic vehicle detector 3A is for spot-observing in a short time the passage of the vehicle to a predetermined location on the right-turn exclusive lane.
As a vehicle detector 5A for spot-observing the passage of the right turn vehicle 5 to the right turn lane, in addition to the ultrasonic type, an optical sensor using infrared light, laser light, or the like, or a right turn vehicle 5 with an inductance change. It is also possible to employ a loop coil that senses.
Further, the image-type vehicle detector 3B that measures the vehicle type (vehicle length) of the right turn vehicle 5 of the present embodiment may also be used as the vehicle detector 3A that detects the presence or absence of the right turn vehicle 5. In this case, the vehicle detector 3B may measure the presence / absence of the right turn vehicle 5 and the vehicle type.

As shown in FIG. 9B, the image-type vehicle detector 3B monitors a predetermined section from the stop line in the inflow paths L1, L3, L5, and L7 to a position away from the stop line by a predetermined distance (for example, 30 m). The vehicle type of the right turn vehicle 5 in the monitoring range of the right turn exclusive lane can be detected almost in real time by setting the range and performing image processing on the camera video in the monitoring range. The vehicle type information measured by the vehicle detector 3B is acquired by the communication unit (acquisition unit) 103 of the traffic signal controller 1, and the vehicle type information is transferred to the control unit 101.
The vehicle detector 3B may measure the vehicle length instead of the vehicle type. Further, as the vehicle detector 3B for measuring the vehicle type (vehicle length) of the vehicle 5 of the right turn vehicle, vehicle type information or probe information including vehicle length information is received from a vehicle equipped with an in-vehicle device, or an ETC in-vehicle device is installed. An optical sensor such as an optical beacon, a narrow area wireless communication device, or an ITS wireless device that receives vehicle type information or vehicle length information from the vehicle that has been used can also be employed.

FIG. 10 is an explanatory diagram showing a specific example of setting the extension limit time of the right turn sensitive control by the time setting unit 111 of the control unit 101. FIG. 11 is a flowchart showing a procedure for setting the extension limit time. Hereinafter, the extension limit time setting performed by the time setting unit 111 will be described with reference to these drawings.
In the specific example shown in FIG. 10, when the right turn sensitive control is executed for the second display 2φ that gives the right of passage only in the right turn direction of the inflow channels L3 and L7 (see FIG. 9), the extension time limit of the right turn sensitive control is executed. The case where Te is determined is shown. In addition, each right turn lane of the inflow channels L3 and L7 has two lanes (first and second right turn lanes), and vehicle detectors 3A and 3B are installed in each right turn lane. .

As shown in FIG. 11, in the first and second right turn lanes, the time setting unit 111 detects that the vehicle detector 3A detects a gap (change from a state where a right turn vehicle is sensed to a state where it is not sensed). It is determined whether or not (step SS1). When the gap is detected, the time setting unit 111 transmits the vehicle type information measured by the vehicle sensor 3B from the vehicle sensor 3B to the communication unit for the right turn vehicle that is detected by the vehicle sensor 3A until immediately before the gap is detected. It is acquired via 103 (step SS2). Next, the time setting unit 111 calculates “lane-specific request times Ta1, Ta2” for each right-turn exclusive lane according to the following formulas (3) and (4) based on the vehicle type information of the right-turn vehicle (step SS3). .
Ta1 = Tb + n1 (3)
Ta2 = Tb + n2 (4)
Here, Tb is a “shortest extension limit time” set in advance, and is set to, for example, 10 seconds in this embodiment. Further, n1 and n2 are “extended times” set corresponding to the vehicle type of the right turn vehicle for each right turn exclusive lane, and are set to 2 seconds, for example, in this embodiment.

  The extension times n1 and n2 are added to the shortest extension limit time Tb every time the vehicle detector 3B measures the vehicle type of the right turn vehicle as “large vehicle”. Therefore, as shown in FIG. 10, since there are a total of two large vehicles in the right turn vehicle 5a traveling in the first right turn exclusive lane, an extension time of 4 seconds (= 2 vehicles × 2 seconds) is added. Further, since there is a total of one large vehicle in the right turn vehicle 5b traveling in the second right turn exclusive lane, an extension time of 2 seconds (= 1 vehicle × 2 seconds) is added. Thereby, the required time Ta1 for each lane is Ta1 = 10 + 2 + 2 = 14 seconds from the above equation (3). Further, the lane-specific request time Ta2 is Ta2 = 10 + 2 = 12 seconds from the above equation (4).

  Next, the time setting unit 111 determines the longest lane-specific request time among the lane-specific request times Ta1 and Ta2 calculated for each right-turn exclusive lane as the “request extension limit time Ta” (step SS4). In the present embodiment, the lane-specific request time Ta1 (14 seconds) of the first right-turn dedicated lane is longer than the lane-specific request time Ta2 (12 seconds) of the second right-turn dedicated lane. The time Ta1 becomes the required extension limit time Ta.

Next, the time setting unit 111 compares the required extension limit time Ta with a preset “longest extension limit time Tc” (for example, 16 seconds), and determines the shorter one as the “extension limit time Te”. (Step SS5). In the present embodiment, since the required extension limit time Ta (14 seconds) is shorter than the longest extension limit time Tc (16 seconds), the required extension limit time Ta is determined as the extension limit time Te.
In addition, when the right turn vehicles 5a and 5b do not exist from the beginning in each right turn exclusive lane, the preset shortest extension limit time Tb is set as the extension limit time Te.

  As described above, according to the traffic signal controller 1 according to the present embodiment, the extension times n1 and n2 set corresponding to the vehicle type information of the right turn vehicle in the right turn exclusive lane are added to the preset minimum extension limit time Tb. Since the extension limit time Te of the right turn sensitive control is determined from the required extension limit time Ta obtained in this way, the extension limit time Te can be determined according to the vehicle type information of the right turn vehicle in the right turn exclusive lane. Thereby, when a large vehicle turns to the right, the extension limit time Te can be set longer, so that an appropriate signal lamp color switching timing can be determined according to the vehicle type of the right turn vehicle.

In addition, the longest required time for each lane out of the required time for each lane Ta1, Ta2 obtained for each of the right-turn exclusive lanes is set as the required extension time limit Ta, and the extension time limit Te is determined based on this required extension time limit Ta. Therefore, the extension limit time Te can be determined in consideration of the vehicle type of the right turn vehicle in each right turn exclusive lane. As a result, a more appropriate signal lamp color switching timing can be determined.
Further, since the required extension limit time Ta is compared with a preset maximum extension limit time Tc and the shorter one is determined as the extension limit time Te, the determined extension limit time Te is the maximum extension limit time Te. It does not become longer than time Tc. Thereby, it is possible to prevent the extension limit time Te from being set extremely long.

  In this embodiment, the control unit 101 (time setting unit 111) of the traffic signal controller 1 sets the extension limit time, but the control unit of the central device 4 sets the extension limit time. Also good. That is, the central device 4 may execute the control processes to set the extension limit time Te of the right turn sensitive control and transmit a control command based on the setting result to the traffic signal controller 1.

[Sixth Embodiment]
The fifth embodiment employs an image type as the vehicle detector 3B, but the sixth embodiment of the present invention employs an ITS radio as the vehicle detector 3. In other words, in the present embodiment, the vehicle detector 3 is sensitive to the right turn based on the vehicle type information included in the probe information received from the vehicle (hereinafter simply referred to as “vehicle”) 5 in which the in-vehicle device is mounted. "Extension limit time setting" of control is performed. Since the other configuration of the present embodiment is the same as that of the fifth embodiment, the description thereof is omitted.

The procedure for setting the extension time limit of this embodiment is the same as the flowchart shown in FIG. 11 in the fifth embodiment described above, but the specific processing procedures in steps SS2 and SS3 are different from those in the fifth embodiment. . Hereinafter, the processing procedure of steps SS2 and SS3 will be described.
In step SS2, the time setting unit 111 acquires the vehicle type information of the right-turn vehicle sensed by the vehicle sensor 3A until immediately before detecting the gap from the vehicle sensor 3B. Specifically, the vehicle detector 3B receives the probe information from the right turn vehicle, and the vehicle type information included in the probe information is transferred from the vehicle detector 3B to the time setting unit 111 via the communication unit 103.

Next, in step SS3, the time setting unit 111 calculates “required times Ta1 and Ta2 for each lane” for each right turn lane according to the above formulas (3) and (4) based on the vehicle type information of the right turn vehicle. To do. The extension times n1 and n2 of the expressions (3) and (4) are added to the shortest extension limit time Tb every time the vehicle type information of the right turn vehicle acquired from the vehicle detector 3B is “large vehicle”.
As mentioned above, also in this embodiment, there exists an effect similar to 5th Embodiment.

[Seventh Embodiment]
FIG. 12 is an explanatory diagram showing a specific example of the right turn sensitive control by the time setting unit of the traffic signal controller according to the seventh embodiment of the present invention. This embodiment shows a modification of the right turn sensitive control of the fifth embodiment, and the time setting unit 111 determines the unit extended blue time according to the vehicle type of the right turn vehicle in the right turn sensitive control. This is different from the fifth embodiment in that “blue time setting” is performed. Here, the “unit extension blue time” is a unit time for extending the display of the right turn blue arrow light when the vehicle detector detects the passage of the vehicle. The remaining configuration of the present embodiment is the same as that of the fifth embodiment, and a description thereof will be omitted.

FIG. 13 is a flowchart showing the procedure for setting the unit extended blue time of the right turn sensitive control by the time setting unit 111. Hereinafter, the unit extended blue time setting performed by the time setting unit 111 will be described with reference to FIGS.
The specific example shown in FIG. 12 is a unit extension blue of the right turn sensitive control when the right turn sensitive control is executed for the second display 2φ that gives the right to pass only in the right turn direction of the inflow channels L3 and L7 (see FIG. 8). The case where time uG is determined is shown.

  As shown in FIG. 13, the time setting unit 111 detects whether the ultrasonic vehicle sensor 3A detects a gap (change from a state where a right turn vehicle is sensed to a state where it is not sensed) in a right turn exclusive lane. It is determined whether or not (step SS1). When the gap is detected, the time setting unit 111 determines whether or not the image-type vehicle sensor 3B measures the presence or absence of a subsequent right turn vehicle that the vehicle sensor 3A senses next (step SS2). ). When there is the subsequent right turn vehicle, the time setting unit 111 acquires the vehicle type information measured by the vehicle detector 3B for the right turn vehicle from the vehicle detector 3B via the communication unit 103 (step SS3). On the other hand, when there is no subsequent right turn vehicle, the time setting unit 111 determines a first unit time uG1 described later as a unit extended blue time uG (step SS5).

Next, the time setting unit 111 determines any one of preset first to third unit times uG1 to uG3 as a unit extended blue time uG based on the vehicle type of the subsequent right turn vehicle. (Step SS4). The magnitude relationship between the values of the first to third unit times uG1 to uG3 is uG1 <uG2 <uG3. The first unit time uG1 is set to 3 to 4 seconds, for example, and is determined as the unit extended blue time uG when the vehicle type of the subsequent right turn vehicle is “passenger car”. The second unit time uG2 is set to 4 to 6 seconds, for example, and is determined as the unit extended blue time uG when the vehicle type of the subsequent right turn vehicle is a “large vehicle”. The third unit time uG3 is set to twice the first unit time uG1 (for example, 6 to 8 seconds), and is set when the vehicle type of the subsequent right turn vehicle is “two-wheeled vehicle”.
The longest third unit time uG3 is set when the vehicle type of the right turn vehicle is a two-wheeled vehicle because the two-wheeled vehicle may not be detected after passing outside the detection area of the vehicle detector 3A. This is to prevent the right turn blue arrow lamp from being discontinued in spite of the right turn vehicle traveling behind the two-wheeled vehicle.

  The unit extended blue time setting of the present embodiment will be described in detail using a specific example of FIG. As shown in FIG. 12, when the vehicle detector 3A detects the gap when the leading right turn vehicle (passenger car) passes, the time setting unit 111 detects the subsequent right turn detected next by the measurement of the vehicle detector 3B. Based on the vehicle type information that the vehicle 5 is a “large vehicle”, the unit extended blue time uG until the large vehicle is detected is determined as the second unit time uG2 that is the second longest. Thereafter, when the vehicle detector 3A detects a new gap as the large vehicle passes, the time setting unit 111 indicates that the subsequent right turn vehicle 5 detected next by the measurement of the vehicle detector 3B is “passenger vehicle”. Based on the vehicle type information that there is, the unit extended blue time uG until the passenger car is detected is determined as the shortest first unit time uG1. After that, when the vehicle detector 3A detects a new gap as the passenger vehicle passes, the time setting unit 111 determines that the subsequent right turn vehicle 5 detected next by the measurement of the vehicle detector 3B is “two-wheeled vehicle”. Based on the vehicle type information that there is, the unit extended blue time uG until the next succeeding vehicle (passenger car) of the two-wheeled vehicle is detected is determined as the longest third unit time uG3.

  As described above, according to the traffic signal controller 1 of the present embodiment, the unit extension blue until the subsequent right turn vehicle 5 is detected corresponding to the vehicle type information of the subsequent right turn vehicle 5 detected by the vehicle detector 3A. Since the time uG is determined, when the subsequent right turn vehicle 5 is a large vehicle, the unit extended blue time uG until the large vehicle is detected can be set longer. Accordingly, it is possible to determine an appropriate signal lamp color switching timing corresponding to the vehicle type of the right turn vehicle 5.

  In this embodiment, the control unit 101 (time setting unit 111) of the traffic signal controller 1 performs unit extended blue time setting, but the control unit of the central device 4 performs unit extended blue time setting. It may be. That is, the central device 4 may execute these control processes to set the unit extension blue time uG for right turn sensitive control and transmit a control command based on the setting result to the traffic signal controller 1.

[Eighth Embodiment]
The seventh embodiment employs an image type as the vehicle sensor 3B, but the eighth embodiment of the present invention employs an ITS radio as the vehicle sensor 3. In other words, in the present embodiment, the vehicle detector 3 is sensitive to the right turn based on the vehicle type information included in the probe information received from the vehicle (hereinafter simply referred to as “vehicle”) 5 in which the in-vehicle device is mounted. "Unit extended blue time setting" of control is performed. Since the other configuration of the present embodiment is the same as that of the seventh embodiment, the description thereof is omitted.

  The procedure for setting the extension time limit of this embodiment is the same as the flowchart shown in FIG. 13 in the seventh embodiment described above, but the specific processing procedure in steps SS2 and SS3 is different from that in the seventh embodiment. . Hereinafter, the processing procedure of steps SS2 and SS3 will be described.

In step SS2, the time setting unit 111 determines whether there is a subsequent right turn vehicle that the vehicle detector 3A senses next. Specifically, it is determined by whether or not the vehicle sensor 3B has received the probe information of the subsequent right turn vehicle that the vehicle sensor 3A senses next.
In step SS3, when there is the succeeding right turn vehicle, the time setting unit 111 acquires the vehicle type information of the right turn vehicle from the vehicle detector 3B. Specifically, the vehicle detector 3B receives probe information from the subsequent right turn vehicle, and the vehicle type information included in the probe information is transferred from the vehicle detector 3B to the time setting unit 111 via the communication unit 103. .
As mentioned above, also in this embodiment, there exists an effect similar to 7th Embodiment.

[Other variations]
The embodiment disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
For example, when the right turn sensitive control is performed in the control unit 101 of the traffic signal controller 1, the extension limit time setting for setting the extension limit time Te of the fifth or sixth embodiment, and the seventh or eighth embodiment. The unit extended blue time setting for setting the unit extended blue time uG may be used in combination. In this case, the following effects can be obtained. That is, when only the extension limit time is set, for example, when there is a large vehicle on the right turn lane, even if the extension limit time Te is set longer by the extension limit time setting, the large vehicle starts moving slowly. Due to this, there is a possibility that the unit turn blue time uG will be reached before the extension limit time Te is reached, and the display of the right turn blue arrow light will be cut off. However, if the extension limit time setting and the unit extension blue time setting are used in combination, the unit extension blue time uG can be set longer in addition to the extension limit time Te when there is a large vehicle on the right turn exclusive lane. Therefore, it is possible to suppress the occurrence of the above problems.

  Further, the control unit 101 of the traffic signal controller 1 sets the total red time of the clearance time in any of the first to fourth embodiments, and the extension limit time of the right turn sensitive control of the fifth or sixth embodiment. In combination with the setting, the total red time setting of the clearance time of any of the first to fourth embodiments, and the unit extended blue time setting of right turn sensitive control of the seventh or eighth embodiment. May be. Further, the all red time setting, the extension limit time setting, and the unit extension blue time setting may all be used together. In these cases, it is possible to determine a more appropriate signal lamp color switching timing corresponding to the type of vehicle passing through the intersection.

DESCRIPTION OF SYMBOLS 1 Traffic signal controller 3A Vehicle detector 5 Vehicle 103 Communication part (acquisition part)
111 Time setting unit 112 Judgment unit CR Crossing time CR1, CR2 Directional time IS crossing n1, n2 Extension time R Total red time Rp Shortest all red time Ta Required extension limit time Ta1, Ta2 Lane-specific request time Tb Minimum extension limit Time Tc Maximum extension time Te Extension limit time uG Unit extension blue time

Claims (4)

A traffic signal controller for controlling the timing of switching the signal light color by adjusting a clearance time required for a vehicle traveling in the intersection when the signal light color is switched to pass through the intersection,
An acquisition unit for acquiring the speed information of the vehicle and vehicle type information or vehicle length information;
A time setting unit that determines the total red time of the clearance time in response to the acquired speed information and vehicle type information or vehicle length information ,
The time setting unit calculates an intersection passage time for the vehicle to pass through the intersection based on the speed information acquired by the acquisition unit and vehicle type information or vehicle length information, and the calculated intersection passage time, A traffic signal controller characterized by comparing with a preset shortest total red time and determining the longer red time as the total red time . The said time setting part calculates the passing time according to direction for which the said vehicle passes the said intersection for every outflow direction of the said intersection, and makes the longest passing time according to direction among these passing times according to a direction into the said intersection passing time. The traffic signal controller according to claim 1 . The time setting unit subtracts a time extended from the shortest total red time from a display time of a predetermined signal lamp color after the next display when the total red time is longer than the shortest total red time. The traffic signal controller according to claim 1 or 2 , wherein correction processing is performed. A traffic signal controller that performs gap-sensitive control for adjusting a display time of the blue arrow light in the specific direction based on a detection signal of a vehicle sensor that detects the presence or absence of a vehicle in a specific lane in a specific direction,
When the vehicle sensor detects a vehicle in the dedicated lane, the acquisition unit acquires vehicle type information or vehicle length information of a subsequent vehicle that the vehicle sensor senses next;
Corresponding to the acquired vehicle type information or vehicle length information, a time setting unit for determining a unit extended blue time until the vehicle sensor detects the subsequent vehicle;
Traffic signal controller, characterized in that it comprises a.

Images