JP4898496B2 - Accident prevention system - Google Patents

Description

  In the present invention, when a related vehicle enters a specific place from a road on which a related vehicle or a general vehicle related to a specific place such as a construction vehicle or an ambulance passes, a surrounding vehicle collides with the related vehicle. The present invention relates to an accident prevention system to prevent.

Conventionally, various systems that provide various types of information to a vehicle traveling on a road have been disclosed. For example, Patent Document 1 discloses an information providing system that transmits and receives a question signal and a response signal between a traveling vehicle and a short-range wireless communication device installed at a fixed point. Patent Document 2 discloses an application that holds information and update information of a bus that requires updating of an application and data in a data center, accesses communication to the bus that requires updating, and transmits necessary update information. A data update system is disclosed.
JP 2003-69489 A JP 2004-348545 A

  There are various systems for sending information to a traveling vehicle as described above. In these methods, all traveling vehicles that receive information are provided with information transmission / reception terminals, and the information transmission / reception terminals are mounted. Information is provided only to vehicles that are present.

  By the way, for example, when a construction vehicle enters the construction site from a general road at a construction site, the construction vehicle decelerates, so if the driver of the following vehicle is not careful, it can collide with the construction vehicle There is sex. Further, when the construction vehicle enters the construction site across the opposite lane, there is a possibility that the vehicle traveling in the opposite lane may collide with the construction vehicle. Furthermore, when a construction vehicle enters a construction site from a general road across a roadside belt or side road, there is a possibility that the construction vehicle may collide with a bicycle or pedestrian that uses the roadside belt or side road. is there.

  However, the above-mentioned succeeding vehicles, oncoming lane vehicles, roadside belts, and sideways passersby may not use the information transmission / reception terminal for acquiring the approach information of the construction vehicle. He had to guess the approach to the scene and avoid the collision.

  Therefore, an object of the present invention is to prevent dangers caused by a related vehicle such as a construction vehicle entering a construction site from a road even if a vehicle or a passerby does not have a dedicated information transmission / reception terminal. And providing an accident prevention system capable of preventing a collision accident with the relevant vehicle.

The present invention is an accident prevention system for preventing an accident with a related vehicle entering a specific place located beside a road . The accident prevention system of the present invention is a terminal device having an ITS communication function installed in a related vehicle, a radio base station installed in the vicinity of an entrance from a road at a specific location, and receiving control from the radio base station. And status notification means for performing a notification for preventing a collision with a related vehicle . The radio base station according to the present invention performs notification control to the situation notification means so as to cause notification to prevent collision with a related vehicle-related vehicle based on a signal from a terminal device having an ITS communication function. It is said.

  In this configuration, when the related vehicle travels toward the entrance of a specific place and reaches a predetermined range from the entrance, the radio base station communicates with a terminal device having an ITS communication function of the related vehicle. Specifically, when a construction vehicle enters a construction site or an ambulance enters a hospital, the wireless base station communicates with a terminal device having an ITS communication function of the related vehicle. The radio base station controls the specific notification to the status notification unit based on the signal transmitted from the terminal device having the ITS communication function. Under this control, the situation notification means performs an accident prevention notification with a content indicating that the related vehicle enters the specific location. Thereby, it is possible to call attention to a driver of a general vehicle.

  In the accident prevention system of the present invention, the signal from the terminal device having the ITS communication function is the individual identification number information of the terminal device. When the wireless base station detects that the individual identification number information is a preset individual identification number, the wireless base station performs notification control to the status notification means.

  In this configuration, an individual identification number is used as information for detecting a terminal device having an ITS communication function. Since the individual identification number is information unique to each terminal device, the corresponding terminal device can be detected by the individual identification number.

The accident prevention system according to the present invention is characterized in that the terminal device having the ITS communication function is an ETC vehicle-mounted device.
In this configuration, an ETC in-vehicle device that is conventionally used in a non-stop automatic fee payment system is used as a terminal device having an ITS communication function. The ETC on-board device is currently widely spread and has a unique individual identification number for each ETC on-board device, and is therefore one of the most suitable for introduction into the system of the present invention.

  Further, the radio base station of the accident prevention system according to the present invention is located at a position spaced apart from the entrance by a first installation distance on the upstream side of the flow of the automobile along the road and in the vicinity of the road side on the entrance side of the road Is installed. In addition, the status notification means is installed at a position further away from the radio base station along the road side by a second installation distance, and notifies the upstream side along the road.

  Specifically, in this configuration, the radio base station and the status notification unit are installed on the same side as the entrance of the specific place with respect to the road and on the upstream side in the traveling direction with respect to the entrance. At this time, the radio base station is installed at a first installation distance in consideration of the deceleration start position of the related vehicle and the effective wireless reachable range. Further, the status notification means is installed further upstream than the radio base station. At this time, the situation notification means is installed at the second installation distance at which the driver of the subsequent general vehicle recognizes the contents notified by the situation notification means and can sufficiently take measures for deceleration. Accordingly, attention can be urged so as to prevent a succeeding vehicle traveling in the same lane as the related vehicle from colliding with the related vehicle.

  Moreover, the situation notification means of the accident prevention system according to the present invention is characterized in that it is installed in a related vehicle.

  In this configuration, since the status notification means is installed in the related vehicle, a clearer notification can be given to the general vehicles around the related vehicle.

  The situation notification means of the accident prevention system of the present invention is characterized in that it is installed on the lane side facing the entrance to the road.

  In this configuration, the driver of a general vehicle traveling in the oncoming lane is notified that the related vehicle traveling ahead is entering a specific location. Thereby, it is possible to call attention to a driver of a general vehicle traveling in the oncoming lane.

  In addition, the radio base station of the accident prevention system of the present invention is characterized in that it is installed on the lane side facing the entrance to the road.

  In this configuration, when there is a related vehicle that crosses the road from the opposite lane facing the entrance lane and enters a specific location, a notification that the related vehicle enters the specific location across the road To the vehicle. Thereby, the driver of each general vehicle can be alerted about the related vehicle crossing the road.

Moreover, the accident prevention system of this invention is provided with the situation notification means for the side road installed in the vicinity of the entrance. The radio base station of the accident prevention system is characterized in that the situation notification means for the side road is notified to prevent collision with a related vehicle.

  In this configuration, a notification that the related vehicle enters the specific location across the sidewalk or the like is given to a pedestrian or the like near the entrance of the specific location. Thereby, a pedestrian can be alerted.

  The accident prevention system according to the present invention is characterized in that the status notification means is a display.

  In this configuration, the above notification can be made visually.

  According to the present invention, there is a possibility that a related vehicle entering a specific place such as a construction vehicle entering the construction site may decelerate or cross the front when entering the vehicle. Can be notified. A driver or pedestrian of a general vehicle who sees this can pay attention to the behavior of the vehicle concerned and take accident prevention measures. At this time, since it is not necessary to provide a dedicated communication device for a driver or a pedestrian of a general vehicle, collision prevention can be realized with a relatively simple system.

An accident prevention system according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram for explaining the outline of the accident prevention system of the present embodiment.
FIG. 2 is a block diagram showing the main configuration of the radio base station 1, the ETC on-board unit 2, and the display unit 3 of the accident prevention system of this embodiment.

FIG. 3 is a system flow diagram of the accident prevention system of the present embodiment.
The following explanation shows the case where “Construction site” is set as “Specific location” and “Construction vehicle” is set as “Related vehicle”. However, the following configuration is applied even in other combinations. can do. For example, when “specific location” is “hospital or fire department” and “related vehicle” is “ambulance”, or “specific location” is “garage” and “related vehicle” is “bus” Furthermore, the present invention can be applied to the case where the “specific place” is a “delivery center” and the “related vehicle” is a “delivery vehicle”.

  As shown in FIG. 1, the accident prevention system according to the present embodiment includes a radio base station 1, a display 3 installed on the roadside of the road 100 on the construction site 101 side, and an ETC onboard equipment 2 mounted on a construction vehicle 201. With.

  The road 100 is, for example, a general road composed of one lane on each side of a lane 111 and a lane 112 as shown in FIG. There is a construction site 101 on the road side of the lane 111 of the road 100, and the boundary between the construction site 101 and the lane 111 of the road 100 becomes the entrance 102.

  The radio base station 1 is installed upstream from the entrance 102 on the road side of the lane 111 by a predetermined distance. The distance between the radio base station 1 and the entrance 102 is such that the radio base station 1 moves to the construction vehicle 201 before the construction vehicle 201 entering the entrance 102 starts to decelerate with respect to the right turn entry. The distance is set so that the mounted ETC vehicle-mounted device 2 can be detected. This distance corresponds to the first installation distance of the present invention. For example, it is set by the maximum speed limit of the road 100, the deceleration performance of the construction vehicle 201, and the effective radio wave reachable range of the radio base station 1. That is, the position farthest from the entrance 102 is calculated so that the construction vehicle decelerates while traveling at the maximum speed limit and can enter the entrance 102 by turning right, and includes the calculated distance. The range is set to be an effective radio wave reachable range from the radio base station 1.

  The indicator 3 is installed on the road side of the lane 111 and further upstream from the radio base station 1. The distance between the wireless base station 1 and the display 3 is determined so that the general vehicle 202 traveling immediately after the construction vehicle 201 is displayed on the display 3 when the collision prevention notification display is controlled from the wireless base station 1. The distance is set within such a range that the display can be visually recognized and a collision preventing operation is possible after the visual recognition. For example, a total value of the reach distance of the radio base station 1 in the direction along the road side of the radio wave, the length of the construction vehicle 201 described above, and the inter-vehicle distance of a general road obtained statistically is used. Of course, it may be installed on the radio base station 1 side (downstream side) from the position obtained by this sum, or on the contrary, it may be installed on the side far from the radio base station 1 (upstream side). What is necessary is just to set suitably according to. At this time, the distance from the entrance 102 to the display 3 corresponds to the second installation distance of the present invention.

  The construction vehicle 201 is equipped with the ETC vehicle-mounted device 2 and operates by receiving electric power from the construction vehicle 201.

Next, the detail of each part is demonstrated.
The radio base station 1 includes a control unit 10, a radio control unit 11, a transmission / reception antenna 12, a communication I / F 13, an external device control unit 14, a memory 15, and a power supply unit 19.
The control unit 10 performs overall control of the radio base station 1 and, if a preset ETC individual identification number and an ETC individual identification number obtained from the detection result match and match, a display control signal for collision prevention To the external device control unit 14. This specific process will be described later.
The radio control unit 11 generates an ETC detection signal transmitted from the transmission / reception antenna 12, and acquires and analyzes a detected signal received by the transmission / reception antenna 12. At this time, when the ETC vehicle-mounted device is detected, that is, when the detected signal is acquired, the wireless control unit 11 gives the ETC individual identification number to the control unit 10. The transmission / reception antenna 12 is an antenna having a predetermined directivity, and in the case of the present embodiment, the transmission / reception antenna 12 is set so that a region of a predetermined distance upstream from the radio base station 1 in the lane 111 is a main radio wave radiation range. ing. Specifically, the radio control unit 11 generates an ETC detection signal at a predetermined time interval and transmits it from the transmission / reception antenna 12. At this time, the wireless control unit 11 sets a communication channel in advance, and generates and transmits an ETC detection signal using the set communication channel.

  The communication I / F 13 controls communication with an external device. For example, communication data control when connected to an external connection type input device or a communication device such as a PC is performed. When the ETC individual identification number is input from the input device connected in this manner, the communication I / F 13 acquires the ETC individual identification number and gives it to the control unit 10.

  The external device control unit 14 outputs a corresponding control signal to an externally connected device based on various control signals from the control unit 10. Specifically, in the case of the present embodiment, when a display control signal is received from the control unit 10, the display control signal is output to the externally connected display 3.

  The memory 15 stores various programs of the radio base station 1 and stores an ETC individual identification number of the construction vehicle input via the communication I / F 13. AC power is supplied from the outside to the power supply unit 19, converted into a predetermined power format, and supplied to each unit of the radio base station 1.

  The ETC vehicle-mounted device 2 includes a control unit 20, a radio control unit 21, a transmission / reception antenna 22, a communication I / F 23, and a power supply unit 29. In addition, since the function of the ETC onboard equipment 2 regarding general automatic fee payment is known, description is abbreviate | omitted.

  The control unit 20 performs overall control of the ETC vehicle-mounted device 2. The radio control unit 21 receives the ETC detection signal from the radio base station 1 received via the transmission / reception antenna 22 and generates a detected signal including its own individual identification number (individual ID). Send. The communication I / F 23 is an interface for reading a known ETC card or the like. The individual code of this ETC card may be used for the aforementioned individual identification number. The power supply unit 29 receives supply of power from the construction vehicle 201 on which the ETC on-vehicle device 2 is mounted, and supplies power to each unit of the ETC on-vehicle device 2.

  The display 3 includes a display 30 and a display control unit 31. When receiving a display control signal from the radio base station 1, the display control unit 31 performs display control on the display 30. The display 30 is installed in the display device 3 so that the direction opposite to the wireless base station 1 and the entrance 102 of the construction site 101 is the display direction. The display 3 is composed of, for example, an LED display panel, and displays a collision prevention message and the like under the control of the display control unit 31. For example, a message such as “! The vehicle for construction ahead is slowing down!” Or “Be careful about slowing down!” Is displayed.

Next, the operation flow of the accident prevention system of this embodiment will be described with reference to FIG.
FIG. 3 is a system flow diagram of the accident prevention system of the present embodiment.

  First, as pre-processing, the radio base station 1 acquires an ETC individual identification number for identifying a construction vehicle via an external input device and stores it in the memory 15 (S101). In addition, the radio base station 1 sets a communication channel according to a preset communication band and a radio wave condition at the site (S102).

The radio base station 1 continues to transmit ETC detection signals at predetermined time intervals (S111).
While the construction vehicle 201 equipped with the ETC on-vehicle device 2 is traveling on the traveling lane 111, the ETC on-vehicle device 2 is in a standby state (S211), but when the construction vehicle 201 reaches the effective radio wave range of the wireless base station 1, The ETC on-board unit 2 receives the ETC detection signal (S212: Y), and transmits a detected signal including its own individual ID (individual identification number) (S213).
The wireless base station 1 is in a standby state for receiving a detected signal when the power is turned on (S121), and when receiving the detected signal from the ETC on-vehicle device 2 (S122: Y), the wireless base station 1 acquires an individual identification number. When the wireless base station 1 detects that the acquired individual identification number matches the previously stored individual identification number of the construction vehicle (S123: Y), the wireless base station 1 generates a display control signal and transmits it to the display 3. . If the acquired individual identification number is not the preset individual identification number of the construction vehicle, the display control is not performed and the process returns to the reception waiting state of the detected signal (S123: N).

  Upon receiving the display control signal (S311), the display device 3 displays the above-described collision prevention notification on the display 30 (S312). At this time, the display time may be set in advance by a built-in timer or the like, or may be set to a time until a display end control signal is received from the radio base station 1. Further, the display may be a constantly lit display or a blinking display.

  When such a display is performed, the general vehicle 202 following the construction vehicle 201 visually recognizes the collision prevention notice on the display, and confirms that the construction vehicle 201 ahead decelerates and enters the construction site 101. I can know. Thereby, the rear-end collision to the construction vehicle 201 can be prevented. At this time, since there is no need to install an ETC vehicle-mounted device or a dedicated display device in the following general vehicle 202, the accident prevention system can be realized with a relatively simple configuration.

  Next, an accident prevention system according to a second embodiment will be described with reference to the drawings.

FIG. 4 is an explanatory diagram for explaining the outline of the accident prevention system of the present embodiment.
The accident prevention system of the present embodiment is an example in which the in-vehicle display 4 is installed at the rear of the construction vehicle 201, and other configurations are the same as those shown in the first embodiment. In the present embodiment, the display device 3 shown in FIGS. 2 and 3 of the first embodiment can be replaced with the display device 3 and the vehicle-mounted display device 4.

  In this configuration, when the individual identification number of the ETC vehicle-mounted device 2 of the construction vehicle 201 matches the previously stored individual identification number, the wireless base station 1 notifies the vehicle-mounted display 4 together with the display 3 of the collision prevention notification. A display control signal for performing is transmitted. At this time, the radio base station 1 transmits a display control signal from the transmission / reception antenna 12. Although not shown, the vehicle-mounted display 4 of the construction vehicle 201 includes an antenna and a wireless control unit. The vehicle-mounted display 4 receives the display control signal from the wireless base station 1 and displays the display 40. To display a collision prevention notification. The display content is the same as that of the display device 3 and indicates that the own vehicle decelerates and enters the construction site 101 to the right. The driver of the general vehicle 202 following the construction vehicle 201 visually recognizes the display on the in-vehicle display 4 and takes measures to prevent a collision.

  By using the configuration of the present embodiment, the driver of the general vehicle 202 following the construction vehicle 201 can detect the future behavior of the construction vehicle 201 ahead without directing the line of sight in the roadside direction. , Can implement collision prevention measures more safely.

  In the present embodiment, an example in which the display 3 and the vehicle-mounted display 4 are used at the same time has been shown, but an embodiment in which only the vehicle-mounted display 4 is used may be used. Moreover, in this embodiment, although the example which transmits a display control signal directly from the wireless base station 1 to the vehicle-mounted display device 4 was shown, the ETC vehicle-mounted device 2 has a function of relaying the display control signal, and the ETC vehicle-mounted device. 2 may propagate the display control signal.

Next, an accident prevention system according to a third embodiment will be described with reference to the drawings.
FIG. 5 is an explanatory diagram for explaining the outline of the accident prevention system of the present embodiment.

  In the accident prevention system of the present embodiment, the radio base station 1 is installed on the road side facing the entrance 102 of the construction site 101 with respect to the road 100, and the indicator 3A is installed on the road side on the radio base station 1 side. The indicator 3B is installed on the road side on the entrance 102 side.

  As shown in FIG. 5, the entrance 102 of the construction site 101 exists on the road side of the road 100 on the lane 112 side. The radio base station 1 is installed on the road 100 on the road side of the lane 111 facing the entrance 102 side, and transmits an ETC detection signal using the upstream of the lane 111 as a detection range.

  The display 3 </ b> A is installed on the same road side as the radio base station 1 and upstream of the radio base station 1 in the lane 111. The display 3 </ b> A is installed such that the display 30 </ b> A has the display direction on the upstream side of the lane 111, which is the opposite direction to the radio base station 1 side.

  The indicator 3B is installed on the same road side as the entrance 102 and upstream of the entrance 112 in the lane 112 (downstream from the entrance 112 in the lane 111). The display 3B is installed such that the display 30B has the display direction on the upstream side of the lane 112 in the direction opposite to the entrance 102.

  In such a configuration, when the wireless base station 1 acquires the individual identification number of the ETC on-board unit 2 of the construction vehicle 201 and detects that it matches the previously stored individual identification number, the wireless base station 1 displays the indicator A display control signal is transmitted to 3A and 3B. The indicators 3A and 3B receive display control signals and perform individual displays on the displays 30A and 30B, respectively. More specifically, the display 3 </ b> A displays toward the upstream side of the lane 111 that “the front construction vehicle decelerates and enters the entrance 102 of the construction site 101”. The indicator 3 </ b> B displays toward the upstream side of the lane 112 that “the construction vehicle crosses the front and enters the entrance 102”.

  Thereby, the notification of collision prevention can be performed to the general vehicles 202 and 203 traveling in the two lanes facing each other. In other words, not only a general vehicle in the lane in which the construction vehicle 201 travels but also a general vehicle in the opposite lane can be notified of collision prevention.

Next, an accident prevention system according to a fourth embodiment will be described with reference to the drawings.
FIG. 6 is an explanatory diagram for explaining the outline of the accident prevention system of the present embodiment.

  The accident prevention system of this embodiment is the same as the accident prevention system shown in the third embodiment of FIG. 5 except that a radio base station is also installed on the road side on the entrance 102 side. That is, the radio base station 1B is installed on the road side near the entrance 102 near the construction site 101, and the radio base station 1A is installed on the road side on the opposite lane side.

  In such a configuration, when at least one of the radio base stations 1A and 1B detects an ETC in-vehicle device having a preset individual identification number, it transmits a display control signal to both the indicators 3A and 3B. At this time, the display control signal includes identification information of the radio base stations 1A and 1B as the transmission source. When the display devices 3A and 3B receive the display control signal, the display devices 3A and 3B detect the source wireless base station and display a collision prevention notification according to the source. Specifically, for example, when the radio base station 1B detects an ETC vehicle-mounted device having a preset individual identification number, the indicator 3B is directed toward the upstream side of the lane 112, saying that “the construction vehicle in front is decelerated. “Enter the entrance 102 of the construction site 101” is displayed. On the other hand, the display 3A does not perform display. Further, when the wireless base station 1A detects the ETC vehicle-mounted device having the preset individual identification number, the indicator 3A is directed toward the upstream side of the lane 111, saying “The construction vehicle in front decelerates and the construction site 101 “Enter the entrance 102” is displayed. On the other hand, the indicator 3 </ b> B performs a display indicating that the construction vehicle crosses the front and enters the entrance 102 toward the upstream side of the lane 112.

  Thereby, even if the construction vehicle 102 arrives from any direction with respect to the construction site 101, a necessary and sufficient notification of collision prevention can be given to the general vehicles in the opposite lanes.

Next, an accident prevention system according to a fifth embodiment will be described with reference to the drawings.
FIG. 7 is an explanatory diagram for explaining the outline of the accident prevention system of the present embodiment.

  The accident prevention system of the present embodiment shows a case where sidewalk zones 113 and 114 exist on the road side of the road 100, and the first embodiment except the sidewalk zones 113 and 114 and the sidewalk zone indicators 5A and 5B. Is the same. Note that description of the same portions as those in the first embodiment is omitted.

  On both sides of the entrance 102 of the construction site 101, sidewalk belt indicators 5A and 5B are installed. The sidewalk indicator 5A is installed on the sidewalk 113 facing the upstream side of the lane 111 from the entrance 102 so that the display 50A faces, and the sidewalk indicator 5B is connected to the lane 111 from the entrance 102. The display 50B is installed on the sidewalk strip 113 facing downstream. The sidewalk display 5A, 5B displays the same notification. For example, an indication that “a construction vehicle is about to enter the entrance” is displayed. This display is performed by receiving a display control signal from the radio base station 1A.

  By using such a configuration, it is possible to notify not only general vehicles traveling on the road 100 but also pedestrians, bicycles, and the like traveling on the sidewalk 113 for collision prevention (prevention of an accident involving an accident).

  As described above, by using the configuration of the present invention, in order to prevent a rear-end collision, a crossing collision accident, and an entrainment accident that may occur when the construction vehicle enters the entrance of the construction site, Notification can be made to general vehicles and pedestrians. At this time, since ordinary vehicles and pedestrians do not need to always have a dedicated communication terminal, an accident prevention system can be realized with a relatively simple system configuration.

  In addition, by using the individual identification number of the ETC on-board unit, an accident prevention system can be realized without adding new hardware as long as the ETC on-board unit is installed even on the construction vehicle. .

  Each of the above-described embodiments is an example showing a combination of a radio base station and an indicator, and the above-described effects are applied to an accident prevention system that can be combined by combining these embodiments. Can be played.

Further, in the above description, the example in which the vehicle-mounted display is installed behind the construction vehicle is shown. However, as shown in FIG. 8, the vehicle-mounted display 4 ′ is installed on the construction vehicle 201. Also good.
FIG. 8 is a diagram showing an example in which the in-vehicle display 4 and the in-vehicle display 4 ′ are installed at the rear and ceiling of the construction vehicle 201, respectively.

  The in-vehicle display 4 installed behind the construction vehicle 201 is the same as that shown in FIG. Further, the in-vehicle display 4 ′ installed on the ceiling of the construction vehicle 201 has a structure for displaying the traveling direction of the construction vehicle 201. By using such a configuration, notification from the construction vehicle 201 to both the front and rear can be performed. This makes it possible to notify both the front and rear vehicles where the possibility of contact increases in the case of a relatively narrow road having no center line as shown in FIG. 8 shows an example in which the vehicle-mounted display is formed separately for the rear and the front. However, a single vehicle-mounted display that simultaneously displays the front and the rear on the ceiling, A vehicle-mounted display that performs display on the display may be used. Further, although FIG. 8 shows an example in which the road width is narrow, as a matter of course, the same effect can be obtained even on a road having a wide width and a center line.

It is explanatory drawing explaining the outline | summary of the accident prevention system of 1st Embodiment. It is a block diagram which shows the main structures of the radio base station 1, the ETC onboard equipment 2, and the display 3 of the accident prevention system of 1st Embodiment. It is a system flow figure of the accident prevention system of a 1st embodiment. It is explanatory drawing explaining the outline | summary of the accident prevention system of 2nd Embodiment. It is explanatory drawing explaining the outline | summary of the accident prevention system of 3rd Embodiment. It is explanatory drawing explaining the outline | summary of the accident prevention system of 4th Embodiment. It is explanatory drawing explaining the outline | summary of the accident prevention system of 5th Embodiment. It is a figure which shows the example which installed the vehicle-mounted display 4 and the vehicle-mounted display 4 'in the back and ceiling of the construction vehicle 201, respectively.

Explanation of symbols

1, 1A, 1B—Radio base station, 10—Control unit, 11—Radio control unit, 12—Transceiver antenna, 13—Communication I / F, 14—External device control unit, 15—Memory, 19—Power source unit,
2-ETC on-board unit, 20-control unit, 21-radio control unit, 22-transmission / reception antenna, 23-communication I / F, 29-power supply unit,
3, 3A, 3B-display, 30, 30A, 30B-display, 31-display control unit,
4,4'-vehicle display, 40-display,
5A, 5B-indicator for sidewalk, 50A, 50B-display,
100-road, 111, 112-lane, 113, 114-sidewalk 201, 201A, 201B-construction vehicle, 202, 203-general vehicle

Claims (8)

An accident prevention system for preventing an accident with a related vehicle entering a specific place beside a road ,
A terminal device having an ITS communication function installed in the related vehicle;
A radio base station installed near the entrance from the road at the specific location;
A status notification means for performing notification to prevent collision with the related vehicle under the control of the radio base station,
The radio base station performs notification control to the status notification unit so as to cause notification to prevent collision with the related vehicle based on a signal from the terminal device having the ITS communication function.
Accident prevention system. The signal from the terminal device having the ITS communication function is individual identification number information of the terminal device,
2. The accident prevention system according to claim 1, wherein when the wireless base station detects that the individual identification number information is an individual identification number set in advance, the wireless base station performs notification control to the status notification unit. The terminal device having the ITS communication function is an ETC vehicle-mounted device.
The accident prevention system according to claim 1 or 2. The radio base station is installed along the road from the entrance, at a position separated by a first installation distance on the upstream side of the flow of automobiles, and in the vicinity of the road side on the entrance side of the road,
The status notification means is installed at a position further away from the radio base station along the road side by a second installation distance further upstream, and notifies the upstream side along the road. 3. The accident prevention system according to any one of 3.   The accident prevention system according to any one of claims 1 to 4, wherein the status notification unit is installed in the related vehicle.   The accident prevention system according to any one of claims 1 to 5, wherein the status notification means is installed on a lane side facing the entrance to the road.   The accident prevention system according to any one of claims 1 to 6, wherein the radio base station is installed on a lane side facing the entrance to the road. A situation notification means for a side road installed in the vicinity of the entrance,
The accident prevention system according to any one of claims 1 to 7, wherein the radio base station causes the side road condition notification means to perform a notification for preventing a collision with the related vehicle.

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