JP2013097538A - Traffic signal information providing system and information providing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traffic signal information providing system and an information providing device for providing accurate signal information even in the case of monitoring a light contact which is flickering.SOLUTION: A detection part 34 detects whether or not the light unit of signal lights (1, 2, 1P, 2P) is lighting, putting out or flickering. A specification part 35 specifies a point of time G1 when the light unit lights after it has been flickering in a longer time than a predetermined time on the basis of driving current detected by a detection part 34. A control part 31 transmits signal information via a transmission part 33 to an optical beacon at the point of time G1 specified by the specification part 35.

Description

  The present invention relates to a traffic signal information providing system that provides traffic signal control information to a vehicle in order to support safe driving of the vehicle and the like, and an information providing apparatus that constitutes the traffic signal information providing system.

  The signal control methods of traffic signal controllers currently in widespread use are roughly divided into table control type and step control type. In the table control type, a signal control device installed in a traffic control center or the like transfers signal control command information, which is a command used as a basis for determining a signal control plan, based on a higher-order command from a higher-level central device or the like. The signal is transmitted to the signal controller, and the traffic signal controller determines its own signal control plan based on the signal control command information, and then switches the display of each signal lamp color according to the signal control plan. Usually, the signal control plan is determined for one cycle at the start of one cycle. That is, in the table control type, since the traffic signal controller determines its own signal control plan, the traffic signal controller itself retains information on when the signal lamp color will change in the future.

  On the other hand, in the step control type, a signal control device installed in a traffic control center or the like determines a signal control plan including a timing for switching each signal light color of a signal light device based on a higher order command from a higher order central device or the like. In the above, a switching timing signal (stepping command) is sent to the traffic signal controller at a time corresponding to the switching timing, and the traffic signal controller switches the display of the signal lamp color according to the stepping command. In the step control type, since the signal control device determines the signal control plan, the traffic signal controller does not hold information on when the signal light color is switched in the future.

  In the past, information on signal control plans held by roadside devices has never been provided to the vehicle side, but in recent years, roadside devices have been transferred from the roadside device to the vehicle side for the purpose of promoting traffic safety and preventing traffic accidents. Road-vehicle coordination systems that improve the safety of vehicles by transmitting information and using the received information on the vehicle side are being studied. As such a system, for example, a safe driving support system that transmits operation information of a traffic light to a vehicle wirelessly and performs brake control according to a remaining display time of a green signal included in the operation information received by the vehicle is disclosed. (For example, refer to Patent Document 1).

  In a conventional road-vehicle cooperation system, when the signal control method is a step control type, the signal control device sends a step command to the traffic signal controller and also provides information on the signal control plan (for example, signal information). Send to the information provider. The information providing device transmits the received signal information to a roadside communication device such as an optical beacon. The optical beacon transmits the received signal information to a vehicle that passes through a communicable area with the optical beacon. The vehicle uses the received signal information for safe driving and safe driving. In this case, the signal information received by the vehicle needs to be synchronized with the signal lamp color switching timing by the traffic signal controller. For this reason, for example, the information providing device monitors the blue (lamp contact) of the vehicular lamp that is lit at the start of one step of the signal cycle, and emits the signal information in synchronization with the time when the blue display is started. Registration with a beacon is made (see, for example, Patent Document 2).

Japanese Patent No. 2806801 JP 2010-39673 A

  However, due to restrictions on the construction or installation conditions of traffic signal controllers and vehicle lamps, wiring for monitoring the lamp contacts (blue) of vehicle lamps is not possible. For example, for pedestrian lamps You may be forced to use a lamp contact. However, pedestrian lamps not only turn on and off in blue, but also repeatedly flash in blue. When monitoring when the blue lights up, the information providing device must Is registered in the optical beacon. When the signal information is registered in the optical beacon every time it blinks blue, the signal information from the beginning to the end of the cycle is re-registered in the middle of the cycle, and there is a gap between the actual lamp color and the signal information. Arise. For example, although the lamp color is blinking blue, the provided signal information is blue.

  The present invention has been made in view of such circumstances, and provides a traffic signal information providing system and a traffic signal information providing system capable of providing accurate signal information even when a blinking lamp contact is monitored. An object of the present invention is to provide an information providing apparatus.

  A traffic signal information providing system according to a first aspect of the present invention includes an information providing device that provides signal information to an in-vehicle device, and a signal control device that transmits signal information to the information providing device, and the signal control device controls traffic signal control. In the traffic signal information providing system that performs traffic signal control by sending a step signal to the aircraft, the information providing device blinks with receiving means for receiving the signal information transmitted by the signal control device. An acquisition means for acquiring a drive signal sent by the traffic signal controller to drive the lamp unit configured in the above, and a time longer than a predetermined time based on the drive signal acquired by the acquisition means A specifying means for specifying a point of time when the light is turned on after being extinguished, and a control means for controlling to provide the signal information received by the receiving means at the time point specified by the specifying means; Characterized in that it obtain.

  The traffic signal information providing system according to a second aspect is characterized in that, in the first aspect, the lamp unit is blue for a pedestrian signal lamp and yellow or red for a vehicle signal lamp.

  The traffic signal information providing system according to a third aspect is characterized in that, in the first aspect or the second aspect, the predetermined time is a light extinction time when the lamp unit is blinking.

  According to a fourth aspect of the present invention, there is provided an information providing device for providing signal information to an in-vehicle device, wherein the signal information transmitted by the signal control device for sending a step signal to the traffic signal controller based on the signal information is transmitted. Based on the receiving means for receiving, the acquiring means for acquiring the driving signal sent by the traffic signal controller to drive the lamp unit configured to blink, the driving signal acquired by the acquiring means, A specifying means for specifying a time point when the lamp unit has been turned off after being extinguished for a time longer than a predetermined time, and a control for controlling to provide the signal information received by the receiving means at the time point specified by the specifying means Means.

  In the first invention and the fourth invention, the information providing device receives the signal information transmitted from the signal control device, and the traffic signal controller sends out the lamp unit configured to blink. Get the drive signal. The lamp unit configured to flash is, for example, blue for a pedestrian signal lamp or yellow or red for a vehicle signal lamp. Based on the acquired drive signal, the information providing device identifies a time point when the lamp unit is turned on after the lamp has been extinguished for a time longer than a predetermined time, and provides the received signal information at the time when the received signal information is identified. The predetermined time is, for example, a light extinction time when blue of a pedestrian signal lamp flashes. Since signal information is provided when the lamp unit is turned on after the lamp has been extinguished for a longer time than the predetermined time, the information providing device sends signal information from the start of the cycle to the optical beacon when the lamp unit repeats blinking. And the situation where the optical beacon provides incorrect signal information to the vehicle can be prevented. In addition, even when monitoring blinking lamp contacts, signal information is provided when the lamp unit is turned on after it has been extinguished for a longer time than the predetermined time, so accurate signal information can be sent as quickly as possible. Can be provided.

  In the second invention, the lamp unit is blue for a pedestrian signal lamp and yellow or red for a vehicle signal lamp. Thereby, even if it is a case where the blue (lamp contact) of a vehicle lamp cannot be monitored, the timing which provides accurate signal information can be specified.

  In the third invention, the predetermined time is a light extinction time when the lamp unit is blinking. For example, when the lamp unit is blue for a pedestrian signal lamp, the blue is the extinction time when the flashing is repeated. In addition, when the lamp unit is yellow or red of the vehicle signal lamp, the yellow or red is the light extinction time when the blinking is repeated. As a result, the provision of the same signal information is repeated at the timing at which the lamp unit repeats blinking. As a result, it is possible to prevent a situation in which the provided signal information is not the latest but contains incorrect information.

  According to the present invention, accurate signal information can be provided even when a blinking lamp contact is monitored.

It is a schematic diagram which shows an example of the traffic signal information provision system which concerns on this Embodiment. It is explanatory drawing which shows an example of a structure of the traffic signal information provision system which concerns on this Embodiment. It is a block diagram which shows an example of a structure of the information provision apparatus which concerns on this Embodiment. It is explanatory drawing which shows an example of the switch timing of the lamp color of each signal lamp. It is a time chart which shows an example of the blue lighting state of the signal lamp device for pedestrians. It is explanatory drawing which shows an example of the switch timing of the lamp color of the signal lamp device for vehicles. It is a time chart which shows an example of the lighting state of yellow of the signal lamp device for vehicles with respect to the main road. It is a time chart which shows an example of the red lighting state of the signal lamp device for vehicles with respect to a secondary road.

  Hereinafter, a traffic signal information providing system and an information providing apparatus according to embodiments of the present invention will be described with reference to the drawings. 1 is a schematic diagram illustrating an example of a traffic signal information providing system according to the present embodiment, and FIG. 2 is an explanatory diagram illustrating an example of a configuration of the traffic signal information providing system according to the present embodiment. These are block diagrams which show an example of a structure of the information provision apparatus 3 which concerns on this Embodiment.

  As shown in FIGS. 1 and 2, the traffic signal information providing system according to the present embodiment includes at least an information providing device 3 and a signal control device 5, and further includes a lamp (1, 2, 1P, 2P), A traffic signal controller 9, an optical beacon 4 as a roadside communication device, a conversion device 6, a central device 8 and the like are provided. Hereinafter, the lamp is also referred to as a signal lamp. As shown in FIG. 1, vehicle lamps 1 and 2 and pedestrian lamps 1P and 2P are installed at predetermined positions of the intersection, and the signal lamp color is switched at a predetermined switching timing by a control signal from the traffic signal controller 9. Done in Hereinafter, the vehicle lamp is also referred to as a vehicle signal lamp, and the pedestrian lamp is also referred to as a pedestrian signal lamp.

  In the inflow path R1 to the intersection, an optical beacon 4 is installed at a required position from the intersection. The optical beacon 4 can perform bidirectional communication with the in-vehicle device 7 in the communicable area 41. That is, required information (for example, signal information) is transmitted to the in-vehicle device 7 via the optical beacon 4. Instead of the optical beacon 4, a radio wave beacon, DSRC (Dedicated Short Range Communication), or the like can be used. In addition, in the example of FIG. 1, although the optical beacon 4 is installed in one place of one inflow path R1, it can also be installed in the required position of each road of the other direction which cross | intersects an intersection.

  The traffic signal controller 9, the information providing device 3, and the optical beacon 4 are installed at each intersection or a road near the intersection, and the signal control device 5 and the conversion device 6 are installed at a plurality of intersections as subordinate control devices. Each traffic signal controller 9 and the information providing device 3 are collectively controlled. That is, the signal control device 5 is connected to a plurality of traffic signal controllers 9 installed at each intersection, and is connected to a plurality of information providing devices 3 installed at each intersection via the conversion device 6. Is done. A central device 8 is connected to the signal control device 5 as an external host control device. The central device 8, the signal control device 5, and the conversion device 6 can be installed in the traffic control center.

  For example, the central device 8 transmits to the signal control device 5 a higher order command determined before the time point when blue display is started with respect to the inflow channel R1. The higher order command includes, for example, signal control parameters such as cycle, split, and offset. The cycle is the time of one cycle of the signal lamp (for example, the time from the blue display to the next blue display after one cycle). Split is the percentage of time that each display occupies in one cycle. The offset is a time difference in cycle start timing between intersections. For example, the central device 8 is updated at a timing of less than one cycle (for example, 50 seconds) for the split. The cycle and offset are updated every 15 minutes, for example.

  The signal control device 5 receives the higher order command transmitted from the central device 8 and sends the step command for the cycle to the traffic signal controller 9 based on the received higher order command. More specifically, the signal control device 5 generates a time table (signal information) including the display seconds of each lamp color of the signal lamp device based on the higher order command, and sends the generated time table to the conversion device 6. At the same time as the transmission, a step signal (step command), which is a switch timing signal, is sent to the traffic signal controller 9 at a time corresponding to the lamp color switch timing specified in the generated timetable. The step command is a command to advance the display to the next level.

  The timetable includes information such as the lamp color of each signal lamp, the display time of the lamp color, and a flag indicating whether the floor is a variable or fixed floor in the order of each floor. Here, the variable step indicates that the display seconds are changed at an update timing such as a cycle or an offset (for example, updated every 15 minutes).

  The traffic signal controller 9 switches the display of the lamp color of each signal lamp (1, 2, 1P, 2P) according to the step command.

  The conversion device 6 converts the time table transmitted from the signal control device 5 into a data format for providing to the in-vehicle device 7, and transmits the converted time table to the information providing device 3. In addition, it can also be set as the structure which includes the function of the converter 6 in the signal control apparatus 5, and is collected as one apparatus.

  The information providing device 3 registers the time table in the optical beacon 4 by transmitting the received time table to the optical beacon 4 in synchronization with a specific time point G1 described later. The optical beacon 4 records the remaining display seconds obtained by subtracting the elapsed time T1 after the specific time point G1 from the display seconds of the currently displayed lamp color (for example, blue) in the received timetable, while maintaining a predetermined period ( For example, every time 0.1 second) elapses, the remaining display seconds are updated, and at the time of communication with the vehicle, the timetable at that time is transmitted to the vehicle.

  As shown in FIG. 3, the information providing device 3 includes a control unit 31 that controls the entire device, a receiving unit 32 that receives a timetable as signal information, and an optical beacon 4 to provide a timetable (signal information) to the vehicle. Transmitter 33 for transmitting to, detector 34 as an acquisition means for acquiring a drive signal transmitted by traffic signal controller 9 to signal lamps (1, 2, 1P, 2P), lamp unit is longer than predetermined time A specifying unit 35 is provided as a specifying unit for specifying a time point when the light is turned on after the time extinction lamp, a storage unit 36 for storing predetermined information such as a timetable, and the like. In this embodiment, the lamp unit is a device that displays one lamp color such as blue, yellow, red, and an arrow, and the lamp (signal lamp) is a group of a plurality of lamp units. For example, the vehicle lamp includes three lamp units of blue, yellow, and red.

  The detection unit 34 detects the drive current (drive signal) flowing in the drive line from the traffic signal controller 9 to the signal lamp (1, 2, 1P, 2P) with a current sensor or the like, so that the lamp unit is turned on. Detect whether the light is blinking or blinking.

  That is, the detection unit 34 detects, with a current sensor or the like, a current flowing through a drive line corresponding to the lamp unit configured to blink among the lamp units of the signal lamps 1, 2, 1P, and 2P. Thus, lighting, extinguishing or blinking of the lamp unit can be detected. The lamp unit configured to blink is, for example, blue for signal lights 1P and 2P for pedestrians, and yellow or red for signal lamps 1 and 2 for vehicles.

  The detection unit 34 does not need to detect the drive current (drive signal) flowing in the drive lines to all the signal lamps (1, 2, 1P, 2P), but the signal lamps for the vehicle (1, 2), Or it can also be set as the structure which detects the drive current (drive signal) which flows into the drive line to any one signal lamp device (1P, 2P) for pedestrians.

  Based on the drive current detected by the detection unit 34, the specification unit 35 specifies a time point G1 when the lamp unit is turned on after the lamp is extinguished for a time longer than a predetermined time. The predetermined time is a light extinction time when the lamp unit is blinking. For example, when the lamp unit is blue for the pedestrian signal lamps 1P and 2P, the blue is the extinction time when the blinking is repeated. Moreover, when the lamp unit is yellow or red of the signal lamps 1 and 2 for vehicles, the yellow or red is the extinction time when the flashing is repeated.

  The control unit 31 has a function as a control unit that controls to provide the received signal information (time table) to the time point G1 specified by the specifying unit 35. That is, the control unit 31 registers the signal information in the optical beacon 4 by transmitting the signal information (time table) to the optical beacon 4 via the transmission unit 33 at the time point G1 specified by the specifying unit 35.

  Next, the operation of the information providing apparatus 3 according to this embodiment will be described. FIG. 4 is an explanatory diagram showing an example of the timing for switching the color of each signal lamp. The example of FIG. 4 shows the switching timing of each lamp color of the signal lamps 1 and 2 for vehicles and the signal lamps 1P and 2P for pedestrians shown in FIG. In the example of FIG. 4, the pedestrian signal lamps 1P and 2P are blue lamp units configured to blink. Steps 1 to 12 correspond to one signal cycle.

  The pedestrian signal lamp 1P is lit blue in step 1, flashing blue in step 2, and lit red in steps 3-12. Hereinafter, although the pedestrian signal lamp 1P will be described as an example, the same applies to the pedestrian signal lamp 2P.

  FIG. 5 is a time chart showing an example of a blue lighting state of the pedestrian signal lamp 1P. In FIG. 5, a rectangular wave indicates a blue lighting state or a blue driving current, a high level (on) indicates a blue lighting state, and a low level (off) indicates that blue is extinguished. It shows the state.

  The blue color of the pedestrian signal lamp 1P is always at a high level in Step 1 and is in a lighting state. In step 2, the flashing is repeated at a cycle of 500 ms with a lighting time of 250 ms and a turn-off time. In Steps 3 to 12, the level is always low and the light is extinguished.

  At the start time of step 1 (time t1), the control unit 31 registers the signal information (time table) received during the most recent one cycle in the optical beacon 4.

  In step 2, the blue light of the pedestrian signal lamp 1P is turned off at time t2, and is turned on at time t3 after 250 ms. Since the light extinction time (t3-t2) is not longer than a predetermined time (for example, 250 ms), it is not confirmed to be off at time t3 and signal information is not registered (registration prohibited). In step 2, the same operation is repeated, and registration of signal information is prohibited.

  After step 3, the light is turned off at time t4, and when the time longer than a predetermined time (t5-t4, for example, 500 ms) has elapsed (time t5), it is confirmed to be off and signal information can be registered.

  Thereafter, blue is lit at the end of step 12, that is, at the start of step 1 of the next cycle (time t6). Therefore, the signal is registered at time t6 with the time t6 set as the specific time G1. Do. The signal information registered at time t6 is signal information received by the receiving unit 32 at an arbitrary time point during one cycle of steps 1-12.

  As described above, the signal unit provides signal information when it is turned on (time t6) after the lamp unit has been turned off for a time longer than a predetermined time (for example, the flashing time) (time t5). The information providing device 3 registers the signal information from the start of the cycle in the optical beacon 4 at the timing when the lamp unit repeats blinking, and prevents the optical beacon 4 from providing erroneous signal information to the vehicle. it can. In addition, even when monitoring blinking lamp contacts, signal information is provided when the lamp unit is turned on after it has been extinguished for a longer time than the predetermined time, so accurate signal information can be sent as quickly as possible. Can be provided.

  In addition, because the pedestrian signal lamps 1P and 2P are used for the blue lamp contact, accurate signal information is provided even when the blue (lamp contact) of the vehicle lamp cannot be monitored. The timing to do can be specified.

  Also, since the predetermined time is the light extinction time when the blue light of the pedestrian signal lamp repeats blinking, and the signal unit is provided at the lighting time after the light extinction time longer than the predetermined time, the lamp unit As a result of repeated provision of the same signal information at the timing of repeated blinking, it is possible to prevent a situation in which the provided signal information is not the latest and incorrect information is included.

  In the above-described example, the blue light of the pedestrian signal lamp is used. However, the present invention is not limited to this, and yellow or red of the vehicle signal lamp can also be used. Hereinafter, the case of using yellow or red of a vehicle signal lamp will be described.

  FIG. 6 is an explanatory diagram showing an example of the timing for switching the color of a signal lamp for a vehicle. The example of FIG. 6 shows a state in which the signal lamp for the main road blinks in yellow at the intersection where the main road and the sub road intersect, and the signal lamp for the sub road repeats red flashing, and then a normal signal cycle is achieved. . In the example of FIG. 6, the lamp unit is configured such that yellow of the vehicle signal lamp for the main road flashes, and the lamp unit configured so that the red of the vehicle signal lamp for the secondary road flashes. It becomes. Steps 1 to 6 correspond to one signal cycle.

  First, a vehicle signal lamp for the main road will be described. The vehicle signal lamp for the main road turns red (step: AR) after repeatedly blinking yellow, turns off in step 1, turns on in step 2, and turns off in steps 3-6.

  FIG. 7 is a time chart showing an example of a yellow lighting state of the vehicle signal lamp for the main road. In FIG. 7, a rectangular wave indicates a yellow lighting state or a driving current of a yellow lamp unit. A high level (on) indicates a yellow lighting state, and a low level (off) indicates a yellow light. Indicates that the light is extinguished.

  In the yellow blinking state, the yellow of the signal lamp turns off at time t1 and lights up at time t2 after 500 ms. Since the extinction time (t2-t1) is not longer than a predetermined time (for example, 500 ms), it is not confirmed to be off at time t2, and signal information is not registered (registration prohibited). In the yellow blinking state, the same operation is repeated and registration of signal information is prohibited.

  When the yellow blinking state ends (time t3), the light is extinguished, and when a time longer than a predetermined time (t4-t3, for example, 1 s) has elapsed (time t4), it is confirmed to be off and signal information can be registered. It becomes.

  Thereafter, yellow is turned on at the end of step 1, that is, at the start time of step 2 (time t5). The signal information registered at time t5 is signal information received by the receiving unit 32 at an arbitrary time before the end of step 2, and can be provided mainly to vehicles traveling on the main road toward the intersection. it can.

  Next, a vehicle signal lamp for the secondary road will be described. As shown in FIG. 6, the vehicle signal lamp for the secondary road turns red (step: AR) after repeating red flashing, and is turned on in steps 1 to 3 and turned off in steps 4 to 6.

  FIG. 8 is a time chart showing an example of a red lighting state of the vehicle signal lamp for the secondary road. In FIG. 8, a square wave indicates a red lighting state or a driving current of a red lamp unit, and a high level (on) indicates a red lighting state and a low level (off) indicates a red color. Indicates that the light is extinguished.

  In the red flashing state, red of the signal lamp is turned off at time t1 and is lit at time t2 after 500 ms. Since the extinction time (t2-t1) is not longer than a predetermined time (for example, 500 ms), it is not confirmed to be off at time t2, and signal information is not registered (registration prohibited). In the red blinking state, the same operation is repeated, and registration of signal information is prohibited.

  The red flashing state ends, and red is turned on in step AR. The lamp is turned off at the start time of step 1 (time t3), the signal is registered off when the time (t4-t3, for example, 1s) longer than a predetermined time has elapsed (time t4), and signal information can be registered. .

  Thereafter, red is turned on at the end of step 2, that is, at the start of step 3 (time t5). Therefore, ON is confirmed at time t5, and signal information is registered with time t5 as a specific time G1. The signal information registered at time t5 is signal information received by the receiving unit 32 at an arbitrary time before the end of step 2, and can be provided mainly to vehicles traveling on the secondary road toward the intersection. it can.

  As described above, since the lamp unit is turned on after the lamp unit has been turned off for a time longer than a predetermined time (for example, the extinguishing time of the blinking state), the signal unit provides the signal information. It is possible to prevent a situation in which the information providing device 3 registers signal information from the start of the cycle in the optical beacon 4 at the timing, and the optical beacon 4 provides erroneous signal information to the vehicle. In addition, even when monitoring blinking lamp contacts, signal information is provided when the lamp unit is turned on after it has been extinguished for a longer time than the predetermined time, so accurate signal information can be sent as quickly as possible. Can be provided.

  In addition, since the yellow or red lamp contact of the vehicle signal lamp is used, even when the blue (lamp contact) of the vehicle lamp cannot be monitored, accurate signal information is provided. Can be specified.

  Also, since the predetermined time is the light extinguishing time when the yellow or red of the signal lamp for vehicles repeats blinking, the signal information is provided at the lighting time after the light extinction longer than the predetermined time. As a result of repeatedly providing the same signal information at the timing at which the unit repeats blinking, it is possible to prevent a situation in which the provided signal information is not the latest and incorrect information is included.

  In the above-described embodiment, the predetermined time is the extinguishing time when the lamp color of the signal lamp repeats blinking, and the signal information is provided to the lighting time point G1 after the extinction time is longer than the predetermined time. However, the present invention is not limited to this. For example, a specific time point G1 can be set to a point in time when the light is turned off after the light has been turned off for more than twice the light-off time.

  The disclosed embodiments are to be considered in all respects as illustrative 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.

1, 2, 1P, 2P Signal lamp 3 Information providing device 4 Optical beacon 5 Signal control device 6 Conversion device 7 In-vehicle device 8 Central device 9 Traffic signal controller 31 Control unit 32 Receiving unit 33 Transmitting unit 34 Detection unit 35 Identification unit 36 Memory

Claims (4)

An information providing device that provides signal information to the in-vehicle device, and a signal control device that transmits the signal information to the information providing device, and the signal control device sends a step signal to the traffic signal controller; In the traffic signal information providing system that performs traffic signal control,
The information providing apparatus includes:
Receiving means for receiving signal information transmitted by the signal control device;
Obtaining means for obtaining a drive signal sent by the traffic signal controller to drive a lamp unit configured to flash;
Based on the drive signal acquired by the acquisition means, the specifying means for specifying the time point when the lamp unit has been turned on after being extinguished for a time longer than a predetermined time;
A traffic signal information providing system comprising: control means for controlling to provide the signal information received by the receiving means at the time point specified by the specifying means. The lamp unit is
The traffic signal information providing system according to claim 1, wherein the pedestrian signal lamp is blue and the vehicle signal lamp is yellow or red. The predetermined time is
The traffic signal information providing system according to claim 1, wherein the lighting time is a blinking time when the lamp unit is blinking. In an information providing device that provides signal information to an in-vehicle device,
Receiving means for receiving the signal information transmitted by the signal control device for transmitting a step signal to the traffic signal controller based on the signal information;
Obtaining means for obtaining a drive signal sent by the traffic signal controller to drive a lamp unit configured to flash;
Based on the drive signal acquired by the acquisition means, the specifying means for specifying the time point when the lamp unit has been turned on after being extinguished for a time longer than a predetermined time;
Control means for controlling to provide the signal information received by the receiving means at the time specified by the specifying means.

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