JP5056159B2 - Traffic signal control system, traffic signal controller, in-vehicle device, and traffic signal control method - Google Patents

Description

  The present invention detects a traffic signal that performs semi-sensitive control, and more specifically, detects a vehicle that is about to enter an intersection from the secondary road side at an intersection where a main road with a high traffic volume and a secondary road with a low traffic volume meet. It is related with the traffic signal apparatus which switches the signal lamp color of a follower road in the case where it does.

As a traffic signal that performs semi-sensitive control, let's enter the intersection from the secondary road with the vehicle detector installed near the stop line of the secondary road at the intersection where the main road with high traffic volume and the secondary road with low traffic volume merge When a vehicle is detected, a traffic signal is known that switches the color of the signal light on the side of the secondary road to blue after a predetermined waiting time has elapsed (for example, Patent Document 1).
JP 11-203592 A

  However, the conventional traffic signal has a problem that even if there is no vehicle traveling on the main road, the vehicle on the secondary road must stop at the predetermined waiting time with a red light. It was. The reason that “almost” is described is that it takes a little time for the vehicle traveling on the secondary road to reach the stop line after passing through the detection area of the vehicle detector. This is because the time is obtained by subtracting the time from the predetermined waiting time.

  In order to solve this problem, the vehicle detector is located upstream from the stop line on the secondary road so that the time required to reach the stop line from the detection area of the vehicle detector is the same as the predetermined waiting time. It is possible to install it in In this case, when the vehicle is detected by the vehicle detector, the signal light color on the road side can be switched to blue when the vehicle reaches the stop line. However, if this vehicle does not reach the stop line and enters a side street (such as a narrow street) on the way, it is not only unnecessary to switch the signal light color of the secondary road side to blue, but also to the main road This causes a problem of causing a vehicle traveling on the vehicle to wait for a useless signal. Even when there is no side road from the detection area of the vehicle detector to the stop line, the destination of the vehicle is between the detection area and the stop line, and the vehicle stops at this destination. A similar problem arises.

  The present invention has been made in view of such circumstances, and provides a traffic signal control system, a traffic signal controller, an in-vehicle device, and a traffic signal control method capable of effectively switching the color of a signal light on a secondary road side to blue. The purpose is to do. It is another object of the present invention to provide a traffic signal control system, a traffic signal controller, an in-vehicle device, and a traffic signal control method that can reduce the signal waiting time of a vehicle on the secondary road side.

  A traffic signal control system according to a first aspect of the present invention includes a traffic signal controller installed at an intersection where a main road and a secondary road meet, and an in-vehicle device mounted on a vehicle traveling on either the main road or the secondary road. The vehicle-mounted device includes a search unit that searches for a guidance route to a destination, and a first determination unit that determines whether the guidance route passes through the intersection. Second determination means for determining whether the road on which the vehicle travels is the secondary road, and the determination result of the first determination means is affirmative, and the determination result of the second determination means Transmission means for transmitting the request information of the right of passage of the secondary road when the road is affirmative, and the traffic signal controller includes a control means for switching the signal lamp color of the intersection based on the request information. (Charging) 1). Here, the main road refers to the road with the highest traffic volume or the road with a wider width among the roads joining the intersection. On the contrary, the secondary road is the road with the lower traffic volume or Apparently the road with the narrowest width.

  In the first invention, the in-vehicle device is directed to the traffic signal controller when it is determined that the guidance route to the destination is via an intersection and the road on which the vehicle is traveling is a secondary road. When the traffic signal controller receives the request information (request information for switching the signal light color of the secondary road to blue, blue arrow, yellow blinking, etc.) and the traffic signal controller receives the request information, the traffic light color of the secondary road side Switch to blue. Therefore, when the vehicle enters a side road on the way to the intersection or stops at the destination, the in-vehicle device does not transmit request information, and the traffic signal controller does not switch the signal light color on the secondary road side. Effectively changing the signal light color of the secondary road to blue, etc., without switching the color of the signal light on the secondary road to blue, etc., or causing a vehicle traveling on the main road to wait for a useless signal. Can be switched.

  The traffic signal control system according to the second aspect of the invention is mounted on a traffic signal controller installed at an intersection where the main road and the secondary road meet, and a vehicle traveling on either the main road or the secondary road. A traffic signal control system in which an in-vehicle device is linked, wherein the in-vehicle device is a search unit that searches for a guidance route to a destination, and first determines whether the guidance route passes through the intersection. The traffic signal controller, comprising: a determination unit; and a transmission unit that transmits request information on the right of passage of the secondary road to the traffic signal controller when the determination result of the first determination unit is affirmative. The second determination means for determining whether or not the road on which the vehicle travels is the secondary road, and when the determination result of the second determination means is affirmative, the intersection based on the request information Control means for switching the signal light color of Obtaining (Claim 2).

  In the first invention, the in-vehicle device makes a determination as to whether or not the road on which the vehicle is traveling is a secondary road, but in the second invention, the traffic signal controller makes the determination. Even if it is this structure, the effect similar to 1st invention is acquired.

  In the traffic signal control system of the first or second invention, the in-vehicle device indicates whether or not the traffic signal controller is permitted to switch the signal light color of the intersection based on the request information. Preferably, the information processing apparatus further includes acquisition means for acquiring permission / rejection information, and the transmission means further transmits the request information when the permission / rejection information indicates permission.

  For example, in a predetermined time zone (for example, at night), the traffic signal controller is allowed to control switching of the signal light color on the slave road side based on the request information, performs the control, and other time zones (for example, In the daytime), when the above control is not permitted and other control (sensitive control, fixed cycle control, etc.) is performed, the in-vehicle device determines whether the traffic signal controller is permitted to perform the control. Only when this indicates permission, request information is transmitted to the traffic signal controller. Therefore, since the traffic signal controller does not receive unnecessary request information, the processing load on the traffic signal controller can be reduced.

  In the traffic signal control system according to the first or second invention, the traffic signal controller acquires permission / rejection information indicating whether or not switching of the signal light color of the intersection is permitted based on the request information. Preferably, the control means further switches the signal color of the intersection based on the request information when the permission / refusal information indicates permission (claim 4).

  The traffic signal controller may determine whether or not the traffic signal controller is permitted to switch the signal light color of the secondary road based on the request information, instead of the in-vehicle device.

  The traffic signal control system according to the first or second aspect of the invention further includes a road device installed at a point away from the intersection on the secondary road, and the transmission means sends the request information to the road device. Preferably, the control means switches the signal light color of the intersection based on the travel time of the vehicle from the communication area of the road device to the intersection (Claim 5). Here, the point away from the intersection means a point at least 30 m away from the intersection, for example, an upstream point of the secondary road.

  The in-vehicle device transmits request information to a road device (a narrow area communication device such as an optical beacon or a radio beacon) installed at a point away from the intersection on the secondary road, and the traffic signal controller requests from the road device. When the information is received, for example, when the time (traveling time) required for the vehicle to travel from the communication area of the device on the road to the intersection (stop line of the secondary road) has passed, the signal light color on the secondary road side is changed to blue or the like Switch. Therefore, when the vehicle (on-vehicle device) that transmitted the request information to the road device reaches the intersection (stop line on the secondary road), the traffic signal controller switches the signal light color on the secondary road side to blue, etc. You can enter the intersection without waiting for traffic lights.

  The transmission means further transmits the vehicle speed information, and the traffic signal controller calculates the travel time based on the distance from the communication area of the road device to the intersection and the speed information. It is preferable to further comprise a first calculating means (claim 6).

  For example, if the traffic signal controller calculates the travel time by dividing the distance from the road area communication area to the intersection (stop line on the secondary road) by the speed of the vehicle received from the in-vehicle device, the vehicle The time point when the road stop line is reached and the time point when the signal light color on the secondary road side is switched to blue or the like can be made closer, and the signal waiting time of the vehicle can be made closer to zero.

  The on-vehicle device further includes second calculation means for calculating the travel time based on a distance from a communication area of the road device to the intersection and a speed of the vehicle, and the transmission means further includes the travel It is preferable to transmit time information (claim 7).

  The travel time may be calculated by the in-vehicle device instead of the traffic signal controller. The traffic signal controller receives the travel time from the in-vehicle device, and switches the signal light color on the secondary road side to blue or the like based on the travel time.

  The transmission means further transmits position information of the vehicle, and the traffic signal controller further includes third calculation means for calculating a travel time to the intersection of the vehicle based on the position information, Preferably, the control means switches the signal color of the intersection based on the travel time calculated by the third calculation means (claim 8).

  For example, if the on-road device is a medium / wide area communication device such as a wireless LAN or WiMAX (World Interoperability for Microwave Access) and is installed near an intersection, the in-vehicle device is located from the upstream point of the secondary road to the vicinity of the intersection. The vehicle-mounted device can transmit the latest vehicle position information to the road device at any time. For example, the time required for the traffic signal controller to receive this position information from the on-road device and for the vehicle to reach the intersection (stop line on the secondary road) from this position and the position of the intersection (stop line on the secondary road). (Running time) is calculated, and when this time elapses, the signal light color on the secondary road side is switched to blue or the like. Therefore, based on the latest vehicle position information, the traffic signal controller will bring the time when the vehicle reaches the intersection (stop line on the secondary road) and the time when the signal light color on the secondary road is switched to blue or the like as close as possible. Therefore, the signal waiting time of the vehicle can be as close to 0 as possible.

Also, the traffic signal controller of the third invention, with respect to vehicles traveling in one of the road towards the intersection of the main road and Tsugumichi path merge, a traffic signal controller for switching the signal light color, the Guidance to the destination by receiving the guidance route to the destination of the vehicle from the vehicle via a predetermined road device or by receiving the destination of the vehicle from the vehicle via the road device by searching for a route, before and means for obtaining Ki誘 guide path, a first determination means for determining whether the guide route is through the intersection, the vehicle road to travel in the Tsugumichi path A signal lamp color at the intersection when the determination result of the second determination means and the first determination means is positive and the determination result of the second determination means is affirmative; Control means for switching And wherein the obtaining (claim 9).

  In the third invention, the traffic signal controller performs both the determination as to whether the guidance route to the destination passes through the intersection and the determination as to whether the road on which the vehicle travels is a secondary road. The traffic signal controller may acquire the guidance route to the destination directly from the in-vehicle device, or may acquire only the destination from the in-vehicle device and search for the guidance route to the destination by itself.

An in-vehicle device according to a fourth aspect of the invention is an in-vehicle device provided with a search means for searching for a guidance route to a destination, and a vehicle equipped with the in-vehicle device is directed to an intersection where a main road and a secondary road meet. And determining whether the guide route passes through the intersection and determining whether the road on which the vehicle is traveling is the secondary road. a second determination means, the determination result of the first judging means is affirmative, and if the determination result of the second judging means is affirmative, the request information right of way of the Tsugumichi path, the Transmission means for transmitting to a traffic signal controller provided with control means for switching the signal lamp color of the intersection based on request information (Claim 10).

  The in-vehicle device of the fourth invention is an in-vehicle device used in the traffic signal control system of the first invention.

Moreover, traffic signal control method of the fifth invention, with respect to vehicles traveling in one of the road towards the intersection of the main road and Tsugumichi path merge, a traffic signal control method for switching a signal light color, the Guidance to the destination by receiving the guidance route to the destination of the vehicle from the vehicle via a predetermined road device or by receiving the destination of the vehicle from the vehicle via the road device by searching for a route, before acquiring Ki誘 guide path, a first determination step of determining whether the guide route is through the intersection, the vehicle road to travel in the Tsugumichi path When the determination result of the second determination step for determining whether or not there is a positive determination result of the first determination step and the determination result of the second determination step is positive, the signal lamp color of the intersection And a controlling step of switching (claim 11).

  The traffic signal control method of the fifth invention is substantially the same as the traffic signal control system of the first or second invention and the traffic signal controller of the third invention.

  As described above, according to the present invention, when it is determined that the guidance route to the destination of the vehicle passes through the intersection and the road on which the vehicle travels is a secondary road, the traffic signal controller Since the signal light color on the secondary road side is switched to blue or the like, switching the signal light color on the secondary road side to blue or the like will not be wasted, or vehicles traveling on the main road will not wait for a useless signal. The signal light color on the secondary road side can be effectively switched to blue or the like. Further, according to the present invention, when the vehicle reaches the intersection, the traffic signal controller switches the signal light color of the secondary road side to blue or the like, so that the signal waiting time of the secondary road side vehicle can be reduced. .

Embodiment 1:
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an outline of a traffic signal control system including a traffic signal controller and an in-vehicle device according to the present invention. The traffic signal control system includes a traffic signal 1, an on-vehicle device 2 mounted on a vehicle 5, a road device 3, a central device 4, and the like. The central device 4 is installed in a traffic control center and is connected to a traffic signal 1 installed at each of a plurality of intersections I via a communication line such as a telephone line. At the intersection I, main roads RM1 and RM2 with a large amount of traffic and subordinate roads RS1 and RS2 with a small amount of traffic merge. The traffic signal 1 is connected to a road device 3 installed on each of the main roads RM1 and RM2 and the secondary roads RS1 and RS2 via a communication line such as a telephone line. The central device 4 may be installed on the road instead of being installed in the traffic control center. Moreover, in FIG. 1, illustration of the on-road device 3 installed in each of the main roads RM1, RM2 and the subordinate road RS2 is omitted.

  The central device 4 transmits a signal control command including information indicating permission / inhibition of semi-sensitive control and traffic information including traffic jam information to the plurality of traffic signals 1 every predetermined time (for example, every 5 minutes). In addition, the central device 4 stores a semi-sensitive intersection table indicating whether or not semi-sensitive control is permitted at each intersection I, and a master-slave road table indicating the master-slave classification for each link flowing into each intersection I in the storage unit of the device. Then, semi-sensitive intersection information is created based on these tables every predetermined time (for example, every 5 minutes) and transmitted to a plurality of traffic lights 1. Here, the link refers to a road between intersections distinguished in the upward direction and the downward direction.

  FIG. 2 is an explanatory diagram showing an example of a semi-sensitive intersection table. The semi-sensitive intersection table includes an intersection ID for identifying an intersection, a semi-sensitive permission / non-permission flag for distinguishing whether or not semi-sensitive control is currently permitted at the intersection, and semi-sensitive control at the intersection. It consists of each column of permission start time and permission end time.

  For example, at an intersection with an intersection ID of 000001, semi-sensitive control is currently permitted, the permission start time of semi-sensitive control is 21:00, and the permission end time is 07:00 (next day). Show. Also, for example, at the intersection with the intersection ID 000050, the semi-sensitive control is not permitted at the present time, and the permission start time and the permission end time of the semi-sensitive control are not set, that is, the semi-sensitive control is permitted all day. It has not been shown.

  FIG. 3 is an explanatory diagram showing an example of a master-slave road table. The master-slave road table includes an intersection ID for identifying an intersection, a link ID for identifying a link flowing into the intersection, and a master / slave flag for distinguishing whether the link is a master road or a slave road. , The road device ID for identifying the road device installed on the link. In addition, it is a secondary road that is subject to semi-sensitive control.

  For example, a link with a link ID of 0000001 that flows into an intersection with an intersection ID of 000001 is a secondary road, and a road device with a road device ID of 00000001 is installed on the link. . Further, for example, a link flowing into an intersection with an intersection ID of 000002 and a link ID of 0000011 is a main road, and a road device with an on-road apparatus ID of 00000011 is installed on the link. ing. The correspondence relationship between the intersections having the intersection IDs of 000001 and 000002 and the links having the link IDs of 0000001 to 0000013 is as shown in FIG.

  FIG. 5 is an explanatory diagram showing an example of semi-sensitive intersection information. The semi-sensitive intersection information includes an intersection ID for identifying an intersection, a link ID for identifying a link flowing into the intersection, and a half for distinguishing whether or not semi-sensitive control is currently permitted at the intersection. Sensitive permission / non-permission flag, semi-sensitive control permission start time and permission end time at the intersection, master / slave flag to distinguish whether the link is a main road or a secondary road, installed on the link It is comprised from each column of the roadside device ID for identifying the roadside device which is.

  For example, in the link with the link ID 0000001, the semi-sensitive control is currently permitted at the intersection with the previous intersection ID of 000001. The permission start time of the semi-sensitive control is 21:00 and the permission end time is 07:00 (next day), which indicates that the link is a secondary road, and a road device with a road device ID of 00000001 is installed on the link.

  Further, for example, in the link having the link ID 000011, the semi-sensitive control is not permitted at the current intersection at the previous intersection ID 000002, and the semi-sensitive control permission start time is 0:00. It is shown that the end time is 05:00, the link is a main road, and a road device with a road device ID of 00000011 is installed on the link.

  The traffic signal 1 includes a traffic signal controller 1a and a plurality of signal lamps 1b. The traffic signal controller 1a receives a signal control command from the central device 4, and controls lighting, extinction, and blinking of each signal lamp such as blue, yellow, red, and right turn arrow of each signal lamp 1b based on the signal control command. To do. The traffic signal controller 1 a receives traffic information and semi-sensitive intersection information from the central device 4 and transmits these information to the road device 3. In addition, the traffic signal controller 1a receives sensitive request information, which will be described later, from the road device 3 installed on the slave roads RS1 and RS2.

  FIG. 6 is a block diagram showing the configuration of the traffic signal controller according to the present invention. The control unit 101 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.

  Moreover, the control part 101 received from the on-road apparatus 3 installed in the subways RS1 and RS2 if the information which shows the permission or non-permission of the semi-sensitive control included in the signal control command received from the central apparatus 4 indicates permission A semi-sensitive control process described later is executed based on the sensitive request information, and the signal lamp color on the secondary roads RS1 and RS2 is switched to blue. On the other hand, if the information indicating permission / denial indicates disapproval, normal control (sensitive control, fixed cycle control, etc.) is executed based on the signal control command without executing the semi-sensitive control process.

  The lamp drive 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 signal lamp output command input from the control unit 101. The AC voltage (AC100V) or DC voltage supplied to each color signal lamp is turned on / off.

  The communication unit 103 has a communication function for performing communication with the central device 4 and communication with the roadside device 3. The communication unit 103 receives a signal control command, traffic information, and semi-sensitive intersection information from the central device 4. Further, the communication unit 103 transmits traffic information and semi-sensitive intersection information to the road device 3. In addition, the communication unit 103 receives the sensitivity request information from the road device 3 installed on the slave road RS1 or RS2.

  The storage unit 104 includes a hard disk, a semiconductor memory, and the like, and stores received signal control commands, traffic information, semi-sensitive intersection information, sensitive request information, and the like.

  The roadside device 3 is a narrow area communication device such as an optical beacon, a radio beacon, or a DSRC (Dedicated Short Range Communication), and wirelessly communicates various information with the in-vehicle device 2 mounted on the vehicle 5. To do. The roadside device 3 includes a communication unit 3a that communicates various information with the in-vehicle device 2, and a communication control device 3b that controls the communication unit 3a. The communication control device 3b is provided with a storage unit such as a ROM, and information on the road device ID of the road device 3 is stored in advance. This road device ID is the same as the road device ID in the master-slave road table. In addition, the information of roadside apparatus ID is not limited to the structure memorize | stored previously, The structure acquired and memorize | stored from the central apparatus 4 grade | etc., May be sufficient.

  The roadside device 3 receives traffic information and semi-sensitive intersection information from the traffic signal 1, and when the vehicle 5 passes through the communication area Q (shaded portion in FIG. 1), these information and the roadside device ID information are transmitted to the in-vehicle device. 2 and the response request information described later is received from the in-vehicle device 2. However, there is a case where the sensitive request information is not transmitted from the in-vehicle device 2 based on the sensitive request process described later. When the roadside device 3 receives the sensitivity request information, the roadside device 3 transmits the sensitivity request information to the traffic signal device 1.

  The in-vehicle device 2 is mounted on the vehicle 5 and wirelessly communicates various information with the on-road device 3. When the vehicle 5 passes through the communication area Q of the road device 3, the vehicle 5 receives traffic information, semi-sensitive intersection information, and road device ID information from the road device 3. Transmit to device 3.

  FIG. 7 is a block diagram showing the configuration of the in-vehicle device according to the present invention. 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 data on the speed of the vehicle 5 measured by a vehicle speed sensor (not shown) detecting the angular speed of the wheels.

  The communication unit 204 receives traffic information, semi-sensitive intersection information, and road device ID information from the road device 3. Further, the communication unit 204 transmits sensitive request information to the roadside device 3 based on a sensitive request process described later.

  The storage unit 205 includes a hard disk, a semiconductor memory, and the like, and stores traffic information, semi-sensitive intersection information, and roadside device ID information received by the communication unit 204. The storage unit 205 stores road map data. The road map data is connected to the intersection data, 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. The link ID of the link to be linked, the link ID of the link connected to the end point of the link, and link data in which the link cost is associated.

  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 includes a touch panel, buttons, and the like, so that a passenger of the vehicle 5 including a driver can set a destination.

  The display unit 207 displays the image data created by the processing unit 209 in the sensitivity request process described later on a monitor (not shown). The audio output unit 208 outputs audio data created by the processing unit 209 in the sensitivity request process described later from a speaker (not shown).

  The processing unit 209 includes one or a plurality of microcomputers and the like, and 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, and an audio output. Each process of the 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.

  In addition, the processing unit 209 executes a sensitivity request process described below. When the destination is set by the operation unit 206, the processing unit 209 searches for a guidance route to the destination, displays image data obtained by superimposing the guidance route on the road map, and searches for the guidance route. The speaker notifies that it has finished. The search for the guidance route is performed using, for example, the Dijkstra method so that the total value of the link cost to the destination is minimized.

  Next, when the communication unit 204 receives the semi-sensitive intersection information from the road device 3, the processing unit 209 extracts the intersection through which the guide route passes and the link flowing into the intersection, and whether or not the link is a secondary road. Respectively. If it is determined that the extracted link is a secondary road, the on-road device ID installed on the inflow link is stored in the storage unit 205 as sensitive request target road device information.

  Specifically, when the communication unit 204 receives the semi-sensitive intersection information from the road device 3, the processing unit 209 first determines the intersection ID of the intersection through which the guidance route passes based on the guidance route and the road map data. And a combination of link IDs of the links flowing into the intersection. Next, the processing unit 209 refers to the semi-sensitive intersection information and determines the main / slave flag and the road device ID in the data corresponding to the combination of the intersection ID and the link ID extracted from the combination of the intersection ID and the link ID. It is extracted and it is determined whether or not the main / sub flag is sub. If the processing unit 209 determines that the slave is slave, the processing unit 209 stores the extracted road device ID in the storage unit 205 as sensitive request target road device information.

  FIG. 8 is a diagram for explaining processing from extraction of a combination of an intersection ID and a link ID to storage of sensitive request target roadside apparatus information. In the figure, the triangle mark indicates the vehicle 5, the star mark indicates the destination, the circle mark indicates the intersection, the thick solid line indicates the link on the guidance route, the arrow indicates the direction of the link, and the thin solid line indicates the link not on the guidance route Is shown. Actually, there are links other than these links, but only the links near the guide route are shown for simplicity. The numbers enclosed in the squares are the intersection IDs of the intersections, and the numbers and characters in parentheses are the link IDs of the links on the guide route in the direction of the arrow, the main / secondary flags of the links, and the links. This is the road device ID of the road device 3 being used.

  The vehicle 5 first passes through the communication area of the roadside device 3 whose roadside device ID is 00000501 installed on the link whose link ID is 0000501. At that time, the communication unit 204 receives traffic information, semi-sensitive intersection information, and road device ID information (000001001) from the road device 3. FIG. 9 is an explanatory diagram showing an example of the semi-sensitive intersection information received at this time. The processing unit 209 uses (intersection ID, link ID) = (000101, 0000501), (000102,) as a combination of the intersection ID and the link ID through which the guidance route passes based on the guidance route and road map data shown in FIG. (000002), (000103, 00000503), (000125, 0000553), and (000152, 0000554) are extracted. Next, the processing unit 209 refers to the semi-sensitive intersection information shown in FIG. 9, and sets (main / sub) as the main / sub flag and road device ID in the data in which the combination of the intersection ID and the link ID corresponds to the above combination. (Flag, Roadside Device ID) = (Main, 00000501), (Main, 00000502), (Main, 00000503), (Main, 00000553), (Sub, 00000554) are extracted. Of these, the processing unit 209 stores the road device ID 00000554 in which the master / slave flag is a slave as sensitive request target road device information.

  After storing the sensitive request target road device information, when the communication unit 204 receives the road device ID information from the road device 3, the processing unit 209 includes the received road device ID in the sensitive request target road device information. It is determined whether or not semi-sensitive control is permitted at the current point of intersection at which the road device with the received road device ID is installed with reference to the semi-sensitive intersection information. If it is determined that it is included, and if it is determined that it is permitted, sensitive request information indicating that the semi-sensitive control process is requested to the road device 3 is transmitted.

  Specifically, when the communication unit 204 receives the road device ID information from the road device 3, the processing unit 209 matches the received road device ID with any of the road device IDs included in the sensitive request target road device information. It is determined whether or not. Next, the processing unit 209 refers to the semi-sensitive intersection information, extracts the semi-sensitive permission / non-permission flag in the data corresponding to the road device ID received by the road device ID, and whether or not the permission is permitted. Determine. Further, when the processing unit 209 determines that they match in each of the above determinations and determines that it is permitted, the processing unit 209 executes the semi-sensitive control process on the traffic signal 1 installed at the intersection I ahead. In order to make a request, the above-described sensitivity request information is transmitted to the roadside device 3.

  This will be described with reference to FIGS. Since the in-vehicle device 2 has received the road device ID information (000001001) from the road device 3 having the road device ID of 000050501 as described above, the processing unit 209 indicates that the road device ID 000050001 is the sensitive request target road device information. It is determined whether or not it coincides with the on-road device ID 00000554 included in. The processing unit 209 determines that they do not match, and does not transmit the sensitive request information to the road device 3.

  The in-vehicle device 2 then passes through the communication areas of the roadside devices having roadside device IDs of 00500502, 00000503, 00000553, and 00000554, and receives traffic information, semi-sensitive intersection information, and roadside device ID information at that time. Here, assuming that the received semi-sensitive intersection information is the same as in FIG. 9, the processing unit 209 performs processing from extraction of the combination of the intersection ID and the link ID to storage of the sensitive request target roadside device information as described above. Execute. As a result, the sensitive request target road device information includes the road device ID 00000554 as described above.

  When the road device IDs are passed through the road device IDs of 00000502, 00000503, and 00000553, these road device IDs (00000502, 00000503, 00000553) do not match the road device ID 00000554 included in the sensitive request target road device information. The processing unit 209 does not transmit sensitive request information to these road devices 3. On the other hand, when the road device having the road device ID 00000554 passes, the road device ID 00000554 matches the road device ID 00000554 included in the sensitive request target road device information. With reference to the sensitive intersection information, the semi-sensitive permission / non-permission flag in the data corresponding to the roadside device ID00000554 is extracted, and it is determined whether or not the permission is permitted. Since the processing unit 209 determines that they match and determines that the processing is permitted, the processing unit 209 transmits the sensitive request information to the road device 3 (the road device 3 whose road device ID is 00000554).

  Next, the semi-sensitive control process executed by the control unit 101 of the traffic signal controller 1a will be described. The control unit 101 inputs a signal lamp output command to the lamp driving unit 102 so that the signal lamp color on the main roads RM1 and RM2 side is blue and the signal lamp color on the secondary road RS1 and RS2 side is red, and communication is performed. It is determined whether the unit 103 has received the sensitivity request information from the road device 3.

  When it is determined that the response request information has been received, the control unit 101 drives the lamp so that the signal lamp color on the side of the secondary roads RS1 and RS2 is switched from red to blue when a preset blue switching time T has elapsed. A signal lamp output command is input to the unit 102.

  When the response request signal is received from the road device 3 installed on the secondary road RS1, the blue switching time T is the distance from the communication area Q of the road device 3 to the stop line P of the secondary road RS1 at a predetermined speed ( For example, the time required to travel at the legal speed of the secondary road RS1 is set. For example, if the distance from the communication area Q to the stop line P is 200 m and the predetermined speed is 36 km / h (= 10 m / sec), the blue switching time T is set to 200/10 = 20 seconds.

  Similarly, when a response request signal is received from the road device 3 installed on the slave road RS2, the blue switching time T is the distance from the communication area of the road device 3 to the stop line of the slave road RS2 at a predetermined speed. It is set to the time required to travel at (for example, the legal speed of the secondary road RS2).

  Therefore, in the present invention, when the vehicle 5 that has transmitted the sensitivity request information to the on-road device 3 installed on the slave road RS1 reaches the stop line P, the traffic signal controller 1a changes the signal light color on the slave road RS1 side to blue. Therefore, the vehicle 5 can enter the intersection I without waiting for a signal.

  Here, when a vehicle detector is installed instead of the road device 3 at the installation position of the road device 3 on the secondary road RS1, and the vehicle detector detects the vehicle 5, after the blue switching time T elapses, the secondary road A difference in effect from the case where control for switching the signal lamp color on the RS1 side to blue (conventional semi-sensitive control) will be described with reference to FIG.

  Even in this conventional semi-sensitive control, as in the present invention, when the vehicle 5 reaches the stop line P, the signal light color on the side of the secondary road RS1 is switched to blue, so the vehicle 5 does not wait for the signal and crosses the intersection. You can enter I.

  However, when the vehicle 5 does not reach the stop line P and makes a right turn to a narrow street RN that is a side road on the way, it is useless to switch the signal lamp color on the side of the secondary road RS1 to blue. Further, since the signal lamp color on the main roads RM1 and RM2 side is switched to red, the vehicle traveling on the main roads RM1 and RM2 is caused to wait for a useless signal.

  Or when the vehicle 5 stops at X which is the destination of the vehicle 5 on the way without reaching the stop line P, the same result is caused.

  However, in the present invention, the in-vehicle device 2 is such that the guidance route to the destination is via the intersection I, semi-sensitive control is permitted at the intersection I, and the slave road RS1 (the road device 3 is installed). Only when the road on which the vehicle 5 is traveling) is a secondary road, sensitive request information is transmitted to the on-road device 3 installed on the secondary road RS1, and the traffic signal controller 1a Since the signal lamp color on the secondary road RS1 side is switched to blue only when the request information is received, when the vehicle 5 turns right on the narrow street RN or stops at the destination X as described above, 2 does not transmit sensitive request information to the road device 3, and the traffic signal controller 1a does not switch the signal lamp color on the side of the secondary road RS1 to blue. Therefore, there is no waste of switching the signal light color on the secondary road RS1 side to blue as described above, and the vehicle traveling on the main roads RM1 and RM2 does not wait for a useless signal. The signal light color on the RS1 side can be effectively switched to blue.

  In the above-described embodiment, the in-vehicle device 2 is configured to acquire semi-sensitive intersection information from the road device 3, but is not limited thereto, and is configured to be acquired through a mobile phone connected to the in-vehicle device 2. Alternatively, it may be obtained through media such as radio broadcasting. Alternatively, semi-sensitive intersection information may be stored in the storage unit 205 in advance and acquired from the storage unit 205, or may be acquired from a storage medium such as a CD-ROM that stores right-turn sensitive intersection information. It may be.

  In addition, when the roadside device 3 transmits the sensitivity request information to the traffic signal controller 1a, and determines that the traffic signal controller 1a has received the sensitivity request information, the signal light color on the slave road RS1, RS2 side is changed from red. The road device 3 transmits sensitive request information to the traffic signal controller 1a, the traffic signal controller 1a further transmits the sensitive request information to the central device 4, and the central device 4 responds to the sensitive device. When it determines with having received request information, the structure which transmits a signal control instruction | command to the traffic signal controller 1a may be sufficient so that the right of passage may be given to subordinate road RS1, RS2.

  Further, the traffic signal controller 1a is not limited to the configuration in which the signal lamp color on the side of the slave roads RS1 and RS2 is switched from red to blue when the blue switching time T elapses. The signal light may be switched to another signal lamp color that gives the right of traffic to the RS2 side.

  In addition, the traffic signal controller 1a is not limited to the configuration in which the signal light color on the side of the slave road RS1, RS2 is switched from red to blue when the blue switching time T has elapsed, and further considers the traffic on the main roads RM1, RM2. The configuration may be such that the signal lamp color on the secondary road RS1, RS2 side is switched.

  In addition, the blue switching time T is set to the time required to travel at a predetermined speed over the distance from the communication area Q to the stop line P of the road device 3, but is not limited thereto. The in-vehicle device 2 transmits the speed data together with the sensitive request information to the road device 3, and the traffic signal controller 1 a receives this speed data, and the blue switching time T is stopped from the communication area Q of the road device 3. The configuration may be such that the distance to P is set to the time required to travel at this speed. With this configuration, the time point when the vehicle 5 reaches the stop line P and the time point when the signal light color on the secondary road RS1 side is switched to blue can be made closer, and the signal waiting time of the vehicle 5 can be made closer to zero.

  Further, the traffic signal controller 1a is not limited to the configuration in which the signal light color on the secondary road RS1 side is switched from red to blue when a preset blue switching time T passes, and the in-vehicle device 2 is connected to the stop line P together with the sensitive request information. The traffic signal controller 1a receives the predicted travel time and switches the signal light color on the secondary road RS1 side from red to blue based on the predicted travel time. May be. The estimated travel time is calculated based on, for example, the position of the vehicle 5, the position of the intersection I (stop line P), speed data, and the like. Even with this configuration, the time point when the vehicle 5 reaches the stop line P and the time point when the signal lamp color on the side of the secondary road RS1 is switched to blue can be made closer, and the signal waiting time of the vehicle 5 can be made closer to zero. The in-vehicle device 2 transmits the expected arrival time to the stop line P instead of transmitting the expected travel time to the stop line P, and the traffic signal controller 1a receives the expected arrival time and receives the expected arrival time. If it becomes, you may switch the signal lamp color by the side of secondary road RS1 to blue.

  The roadside device 3 is not limited to a narrow area communication device, and may be a medium / wide area communication device such as a wireless LAN or WiMAX (World Interoperability for Microwave Access). FIG. 10 is a schematic diagram showing an outline of a traffic signal control system including a traffic signal controller and an in-vehicle device according to the present invention when the road device is a medium / wide area communication device. The road device 3 is installed in the number of roads flowing into the intersection I, and can communicate with a vehicle on one road among a plurality of roads flowing into the intersection. In the figure, only the road device 3 that can communicate with the vehicle 5 on the slave road RS1 is shown, and the road device 3 that can communicate with the vehicles on other roads (the slave road RS2, the master roads RM1, RM2). Illustration is omitted.

  The in-vehicle device 2 transmits the position information of the vehicle 5 together with the sensitive request information to the road device 3, and the traffic signal controller 1a receives the position information of the vehicle 5, and the position of the vehicle 5, the intersection I (stop line P). The time required for the vehicle 5 to reach the stop line P is calculated based on the position of the vehicle, and when this time elapses, the signal lamp color on the secondary road RS1 side is switched from red to blue. According to this configuration, the vehicle-mounted device 2 can transmit the position information of the vehicle 5 to the road device 3 at any time until the vehicle-mounted device 2 reaches the stop line P, and the traffic signal controller 1 a Based on the information, the time point when the vehicle 5 reaches the stop line P and the time point when the signal lamp on the side of the secondary road RS1 is switched from red to blue can be approached as much as possible. You can get closer.

Embodiment 2:
In the above-described first embodiment, the road device 3 is configured to transmit the semi-sensitive intersection information and the road device ID information to the in-vehicle device 2, but the present invention is not limited to this, and the road device 3 is the future device. Intersection ID information of the intersection (the intersection where the traffic signal controller 1a to which the road device 3 is connected) is installed, information indicating whether or not semi-sensitive control is permitted at the intersection, and the road where the road device 3 is installed The structure which transmits the information which shows master-slave distinction to the vehicle-mounted apparatus 2 may be sufficient.

  Hereinafter, the second embodiment of the present invention will be described focusing on the differences from the above-described first embodiment. The central device 4 transmits a traffic control information including a signal control command including information indicating permission / inhibition of semi-sensitive control and traffic information to a plurality of traffic signals 1 every predetermined time (for example, every 5 minutes).

  The traffic signal controller 1a of the traffic signal 1 receives the signal control command and the traffic information from the central device 4, stores the information in the storage unit 104, and indicates whether or not the semi-sensitive control included in the signal control command is permitted. Information, that is, information indicating whether or not the traffic signal controller 1 a is allowed to perform semi-sensitive control is extracted and stored in the storage unit 104. In addition, the traffic signal controller 1 a receives the sensitivity request information from the road device 3 installed on the slave roads RS <b> 1 and RS <b> 2 and stores it in the storage unit 104.

  Further, the traffic signal controller 1 a stores the intersection ID information of the intersection I where the traffic signal controller 1 a is installed in the storage unit 104.

  In addition, the traffic signal controller 1a transmits intersection ID information, information indicating permission / inhibition of semi-sensitive control, and traffic information to the road device 3 at predetermined time intervals (for example, every 5 minutes).

  Further, as in the first embodiment, the traffic signal controller 1a receives the sensitivity request received from the road device 3 installed on the slave roads RS1 and RS2 if the information indicating whether or not the semi-sensitive control is permitted indicates permission. The semi-sensitive control process is executed based on the information, and the signal lamp color on the side of the secondary roads RS1 and RS2 is switched to blue. On the other hand, if the information indicating permission / denial indicates disapproval, normal control (sensitive control, fixed cycle control, etc.) is executed based on the signal control command without executing the semi-sensitive control process.

  The roadside device 3 stores master-slave-specific information indicating whether the road on which the roadside device 3 is installed is a main road or a secondary road in the storage unit of the communication control device 3b. The roadside device 3 receives the intersection ID information, the information indicating whether or not the semi-sensitive control is permitted, and the traffic information from the traffic signal 1, and when the vehicle 5 passes through the communication area Q, these information and master-slave-specific information are transmitted to the in-vehicle device. 2 and the response request information is received from the in-vehicle device 2. However, there is a case where the sensitive request information is not transmitted from the in-vehicle device 2 based on the sensitive request process described later. When the roadside device 3 receives the sensitivity request information, the roadside device 3 transmits the sensitivity request information to the traffic signal device 1.

  The in-vehicle device 2 receives the traffic information, the intersection ID information, the information indicating whether or not the semi-sensitive control and the main / subordinate information are received from the road device 3, and transmits the sensitivity request information to the road device 3 according to the sensitivity request processing described later. .

  Here, the sensitive request process executed by the in-vehicle device 2 will be described. First, as in the first embodiment, the in-vehicle device 2 searches for a guidance route to the destination.

  Next, when the vehicle-mounted device 2 receives the intersection ID information, the information indicating whether or not the semi-sensitive control is permitted, and the master-slave specific information from the road device 3, it is determined whether or not the guidance route is passing through the intersection of the received intersection ID. It is determined whether the information indicating whether the control is permitted indicates permission or not, and whether the master-slave specific information indicates a secondary road. When it is determined that both are positive, that is, when it is determined that the vehicle is passing, indicating permission, or indicating a secondary road, the vehicle-mounted device 2 is installed at the intersection I ahead. In order to request the traffic signal 1 to execute the semi-sensitive control process, the sensitive request information is transmitted to the road device 3.

  Then, also in the second embodiment of the present invention, the in-vehicle device 2 is such that the guidance route to the destination passes through the intersection I, the semi-sensitive control is permitted at the intersection I, and the slave road RS1. Only when the road on which the road device 3 is installed (that is, the road on which the vehicle 5 travels) is a secondary road, sensitive request information is transmitted to the road device 3 installed on the secondary road RS1, and traffic signals are transmitted. Only when the response request information is received, the controller 1a switches the signal lamp color on the slave road RS1 side to blue when the blue switching time T elapses.

  Therefore, as in the first embodiment, when the vehicle 5 that has transmitted the sensitivity request information to the road device 3 reaches the stop line P, the traffic signal controller 1a switches the signal lamp color on the secondary road RS1 side to blue. The vehicle 5 can enter the intersection I without waiting for a signal. Moreover, the signal light color on the slave road RS1 side is not wasted because the signal light color on the slave road RS1 side is switched to blue, or the vehicle traveling on the main roads RM1 and RM2 is not waiting for a wasteful signal. It can be effectively switched to blue.

  In the above-described embodiment, the in-vehicle device 2 determines whether the guidance route to the destination is via the intersection I, whether semi-sensitive control is permitted at the intersection I, the secondary road RS1 (on the road) It is determined whether the road on which the device 3 is installed, i.e., the road on which the vehicle 5 travels, is a secondary road. Although it was the structure which transmits, it is not limited to this. For example, the in-vehicle device 2 determines whether the guidance route to the destination is via the intersection I, whether the semi-sensitive control is permitted at the intersection I, and determines that both are positive. When the response request information is transmitted to the road device 3 and the traffic signal controller 1a receives the sensitivity request information from the road device 3, the road on which the road device 3 is installed is a secondary road. It may be configured that the above-described semi-sensitive control process is executed when it is determined that the road is a secondary road.

  Alternatively, the in-vehicle device 2 determines whether or not the guidance route to the destination is via the intersection I, and when it is determined that the route is passing, the on-vehicle device 2 transmits the sensitive request information to the on-road device 3 and the traffic signal When the controller 1a receives the sensitivity request information from the road device 3, whether the road on which the road device 3 is installed is a secondary road, or whether the traffic signal controller 1a is allowed to perform the semi-sensitive control. The above-described semi-sensitive control process may be executed when it is determined whether or not both are positive.

  The in-vehicle device 2 transmits information on the guidance route to the destination to the road device 3, and when the traffic signal controller 1a receives the information on the guidance route from the road device 3, the guidance route passes through the intersection I. Whether or not semi-sensitive control is permitted at the intersection I, whether or not the road on which the road device 3 is installed is a secondary road, and both are positive When it determines, the structure which performs the above-mentioned semi-sensitive control process may be sufficient.

  Alternatively, the in-vehicle device 2 transmits the destination information to the road device 3, and when the traffic signal controller 1 a receives the destination information from the road device 3, it searches for a guidance route from the road device 3 to the destination. Whether or not the guidance route passes through the intersection I, whether or not semi-sensitive control is permitted at the intersection I, and whether or not the road on which the road device 3 is installed is a secondary road. When it is determined and both are determined to be positive, the above-described semi-sensitive control process may be executed.

  The embodiment disclosed this time should 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 description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a schematic diagram which shows the outline | summary of the traffic signal control system containing the traffic signal controller and vehicle equipment which concern on this invention. It is explanatory drawing which shows the example of a semi-sensitive intersection table. It is explanatory drawing which shows the example of a master-slave road table. It is explanatory drawing which shows the correspondence of an intersection and a link. It is explanatory drawing which shows the example of semi-sensitive intersection information. It is a block diagram which shows the structure of the traffic signal controller based on this invention. It is a block diagram which shows the structure of the vehicle-mounted apparatus which concerns on this invention. It is a figure for demonstrating the process from extraction of the combination of intersection ID and link ID to the memory | storage of sensitive request | requirement request | requirement roadside apparatus information. It is explanatory drawing which shows the example of semi-sensitive intersection information. It is a schematic diagram which shows the outline | summary of the traffic signal control system containing the traffic signal controller and vehicle equipment which concern on this invention.

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 Communication part 104 Storage part 2 Car-mounted apparatus 201 GPS processing part 202 Direction sensor 203 Vehicle speed acquisition part 204 Communication part 205 Storage part 206 Operation part 207 Display Unit 208 Voice output unit 209 Processing unit 3 Roadside device 3a Communication unit 3b Communication control device 4 Central device 5 Vehicle I Intersection P Stop line Q Communication area RM1, RM2 Main road RS1, RS2 Secondary road RN Narrow street X Destination

Claims (11)

A traffic signal control system in which a traffic signal controller installed at an intersection where a main road and a secondary road merge with an in-vehicle device mounted on a vehicle traveling on either the main road or the secondary road There,
The in-vehicle device is
Search means for searching for a guidance route to the destination;
First determination means for determining whether or not the guidance route passes through the intersection;
Second determination means for determining whether the road on which the vehicle is traveling is the secondary road;
A transmission means for transmitting request information for the right of passage on the secondary road when the determination result of the first determination means is affirmative and the determination result of the second determination means is affirmative;
The traffic signal controller is
A traffic signal control system comprising: control means for switching the signal lamp color of the intersection based on the request information. A traffic signal control system in which a traffic signal controller installed at an intersection where a main road and a secondary road merge with an in-vehicle device mounted on a vehicle traveling on either the main road or the secondary road There,
The in-vehicle device is
Search means for searching for a guidance route to the destination;
First determination means for determining whether or not the guidance route passes through the intersection;
A transmission means for transmitting request information for the right of passage of the secondary road when the determination result of the first determination means is affirmative;
The traffic signal controller is
Second determination means for determining whether the road on which the vehicle is traveling is the secondary road;
A traffic signal control system comprising: a control unit that switches a signal lamp color of the intersection based on the request information when a determination result of the second determination unit is affirmative. The in-vehicle device further includes acquisition means for acquiring permission / rejection information indicating whether the traffic signal controller is permitted to switch the signal light color of the intersection based on the request information,
The traffic signal control system according to claim 1, wherein the transmission unit transmits the request information when the permission / refusal information indicates permission. The traffic signal controller further comprises acquisition means for acquiring permission / rejection information indicating whether or not switching of the signal light color of the intersection is permitted based on the request information,
The traffic signal control system according to claim 1 or 2, wherein the control means further switches the signal light color of the intersection based on the request information when the permission / refusal information indicates permission. Further comprising a road device installed at a point away from the intersection on the secondary road,
The transmission means transmits the request information to the road device,
5. The traffic signal according to claim 1, wherein the control unit switches a signal lamp color of the intersection based on a travel time of the vehicle from a communication area of the road device to the intersection. Control system. The transmission means further transmits speed information of the vehicle,
The said traffic signal controller is further provided with the 1st calculation means which calculates the said travel time based on the distance from the communication area of the said roadside apparatus to the said intersection, and the said speed information. Traffic signal control system. The in-vehicle device further includes second calculation means for calculating the travel time based on a distance from a communication area of the road device to the intersection and a speed of the vehicle,
The traffic signal control system according to claim 5, wherein the transmission unit further transmits the travel time information. The transmission means further transmits position information of the vehicle,
The traffic signal controller further includes third calculation means for calculating a travel time to the intersection of the vehicle based on the position information,
5. The traffic signal control system according to claim 1, wherein the control unit switches the signal lamp color of the intersection based on the travel time calculated by the third calculation unit. A traffic signal controller that switches a signal light color for a vehicle traveling on one of the roads toward an intersection where a main road and a secondary road meet,
By receiving a guidance route to the destination of the vehicle from the vehicle via a predetermined road device, or by receiving the destination of the vehicle from the vehicle via the road device by searching for a guidance route, and means for pre-acquires Ki誘 guide path,
First determination means for determining whether or not the guidance route passes through the intersection;
Second determination means for determining whether the road on which the vehicle is traveling is the secondary road;
And a control unit that switches a signal lamp color of the intersection when the determination result of the first determination unit is affirmative and the determination result of the second determination unit is affirmative. Signal control machine. An in-vehicle device provided with a search means for searching a guidance route to a destination,
First determination means for determining whether or not the guidance route passes through the intersection when the vehicle equipped with the in-vehicle device travels on any road toward the intersection where the main road and the secondary road meet. When,
Second determination means for determining whether the road on which the vehicle is traveling is the secondary road;
When the determination result of the first determination means is affirmative and the determination result of the second determination means is affirmative, the request information of the right of passage on the secondary road is based on the request information. An in-vehicle apparatus comprising: a transmission unit that transmits to a traffic signal controller including a control unit that switches a signal lamp color at an intersection . A traffic signal control method for switching a signal light color for a vehicle traveling on any road toward an intersection where a main road and a secondary road meet,
By receiving a guidance route to the destination of the vehicle from the vehicle via a predetermined road device, or by receiving the destination of the vehicle from the vehicle via the road device by searching for a guide route, a step of pre-obtaining the Ki誘 guide path,
A first determination step of determining whether or not the guidance route passes through the intersection;
A second determination step of determining whether the road on which the vehicle travels is the secondary road;
And a control step of switching the signal color of the intersection when the determination result of the first determination step is affirmative and the determination result of the second determination step is affirmative. Signal control method.

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