JP2023082979A - Reverse run detection system - Google Patents

Abstract

To provide a reverse run detection system capable of suppressing occurrence of a missed detection of a reverse run.SOLUTION: A reverse run detection system 1 comprises a reverse run notification unit 24 that outputs reverse run notification information in a case of recognizing a second vehicle that satisfies a first reverse run determination condition that a surrounding vehicle recognition unit 22 recognizes that it is positioned ahead of a first vehicle 1 in a state where a one-way traffic road running recognition unit 21 has recognized that the first vehicle 1 is running on a one-way traffic road, and a surrounding vehicle information acquisition unit 23 recognizes that it is a specific type of vehicle and a number plate is not recognized, and a second reverse running determination condition that the surrounding vehicle recognition unit 22 has recognized that it is positioned behind the first vehicle 1 and the surrounding vehicle information acquisition unit 23 determines that it is the specific type of vehicle and the number plate is recognized.SELECTED DRAWING: Figure 1

Description

The present invention relates to a reverse running detection system.

Conventionally, a GPS sensor identifies the road on which the vehicle is traveling, determines whether the vehicle is traveling in the opposite direction to the designated travelable direction for the identified road, and issues a reverse-travel warning. A reverse-running warning device is known (see Patent Document 1, for example).

Japanese Unexamined Patent Application Publication No. 2015-49208

As described above, when the road on which the vehicle is traveling is specified by the GPS sensor, reverse driving may not be detected depending on the position detection accuracy of the GPS sensor or the reception status of the GPS signal. may occur.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a reverse-running detection system capable of suppressing failure to detect a reverse-running vehicle.

As a mode for achieving the above object, a one-way road travel recognition unit that recognizes that a first vehicle is traveling on a one-way road and recognizes a second vehicle positioned in front or behind the first vehicle. and an image of the second vehicle captured by a camera provided in the first vehicle, the second vehicle has a license plate attached only to the rear portion of the vehicle body. a peripheral vehicle information acquisition unit for determining whether the second vehicle is a vehicle of the specific type, and when determining that the second vehicle is the vehicle of the specific type, executing processing for recognizing a license plate from the captured image; , in a state in which the one-way road travel recognition unit recognizes that the first vehicle is traveling on a one-way road, the peripheral vehicle recognition unit determines that the first vehicle is located in front of the first vehicle; and the surrounding vehicle information acquisition unit determines that the vehicle is of the specific type and the license plate is not recognized, or the first reverse driving determination condition by the surrounding vehicle recognition unit A second reverse-driving determination condition is that the vehicle is recognized to be positioned behind the vehicle, the peripheral vehicle information acquiring unit determines that the vehicle is of the specific type, and the license plate is recognized. A reverse-running detection system including a reverse-running notification unit that outputs reverse-running notification information when the second vehicle that satisfies the requirements is recognized.

In the reverse-running detection system, the reverse-running notification unit recognizes the second vehicle that satisfies the first reverse-running determination condition and recognizes the second vehicle that satisfies the first condition. The reverse-running notification information may be output when a second vehicle that satisfies the second reverse-running determination condition is recognized within a predetermined period of time thereafter.

In the above reverse driving detection system, the one-way road travel recognition unit recognizes that the first vehicle is traveling on a one-way road whose speed limit is equal to or higher than a predetermined speed. good too.

In the above-described reverse-running detection system, when the reverse-running notification unit recognizes a plurality of the second vehicles satisfying the first reverse-running determination condition, a plurality of the second vehicles satisfying the second reverse-running determination condition are detected. and when the second vehicle that satisfies the first reverse-running determination condition and the second vehicle that satisfies the second reverse-running determination condition are recognized, the first A configuration may be adopted in which the reverse-running notification information for notifying that the vehicle is running in the reverse direction is output.

In the above-described reverse driving detection system, the one-way road travel recognition unit recognizes the plurality of first vehicles traveling on the same one-way road in the same direction, When the second vehicle that satisfies the first reverse-running determination condition or the second reverse-running determination condition is recognized among the plurality of first vehicles, it is notified that the second vehicle is running in the reverse direction. It is good also as a structure which outputs the said reverse-running alerting|reporting information which carries out.

According to the reverse-running detection system, it is possible to detect a reverse-running vehicle in a general situation where a vehicle with a license plate attached only to the rear of the vehicle body is traveling on a one-way road. As a result, it is possible to suppress the occurrence of an omission in detection of a vehicle running in the wrong direction.

FIG. 1 is a configuration diagram of a reverse running detection system. FIG. 2 is an explanatory diagram of a situation in which the first vehicle is traveling in a specified direction on a one-way road. FIG. 3 is an explanatory diagram of a situation in which the first vehicle is traveling in the reverse direction on a one-way road. FIG. 4 is a first flow chart of reverse run detection processing. FIG. 5 is a second flowchart of the reverse running detection process.

[1. Configuration of reverse running detection system]
The configuration of the reverse-running detection system 10 of the present embodiment will be described with reference to FIG. The reverse running detection system 10 is mounted on a first vehicle 1 having a communication unit 40 , a front camera 41 , a rear camera 42 , a display 43 , speakers 44 and a navigation device 45 .

The communication unit 40 communicates with an external communication device such as a traffic information server 510 via the communication network 500 . The front camera 41 photographs the front of the first vehicle 1 . The rear camera 42 photographs the rear of the first vehicle 1 . The navigation device 45 includes a GNSS (Global Navigation Satellite System) sensor (not shown), map data, and the like, and performs route guidance and the like to a destination. The display 43 and the speaker 44 are used for route guidance display and output of voice guidance by the navigation device 45, output of reverse driving information described later, and the like.

The reverse running detection system 10 transmits and receives data to and from an external communication device via the communication unit 40 . The reverse driving detection system 10 includes an image in front of the first vehicle 1 captured by the front camera 41 (front captured image) and an image behind the first vehicle 1 captured by the rear camera 42 (rear captured image). is entered. Operations of the display 43 , the speaker 44 and the navigation device 45 are controlled by the control signal output from the reverse driving detection system 10 .

The reverse running detection system 10 is a computer system configured by a processor 20, a memory 30, an interface circuit (not shown), and the like. The memory 30 stores a program 31 for controlling the reverse driving detection system 10 and vehicle type data 32 for determining the type of other vehicle captured by the front camera 41 or the rear camera 42 . The processor 20 functions as a one-way road travel recognition unit 21 , a surrounding vehicle recognition unit 22 , a surrounding vehicle information acquisition unit 23 , and a reverse driving notification unit 24 by reading and executing the program 31 .

The one-way road travel recognition unit 21 recognizes that the first vehicle 1 is traveling on a one-way road. The one-way road travel recognition unit 21 recognizes that the first vehicle 1 is traveling on a one-way road based on the current position of the first vehicle 1 detected by the navigation device 45 and the map information. In addition, the one-way road travel recognition unit 21 recognizes a road sign indicating a one-way road from an image captured by the front camera 41 or the rear camera 42, thereby recognizing that the first vehicle 1 is traveling on a one-way road. recognize.

The peripheral vehicle recognition unit 22 recognizes another vehicle (second vehicle) located in front or behind the first vehicle 1 from the image captured by the front camera 41 or the rear camera 42 . Note that the second vehicle positioned ahead or behind the first vehicle 1 may be recognized by an object detection sensor such as a radar or lidar (LiDAR).

The peripheral vehicle information acquisition unit 23 performs known image processing such as feature amount extraction and pattern matching using the vehicle type data 32 on the image of the second vehicle extracted from the image captured by the front camera 41 or the rear camera 42. Thereby, it is determined whether the second vehicle is a two-wheeled vehicle (corresponding to a specific type of vehicle of the present disclosure) in which a license plate is attached only to the rear portion of the vehicle body. When the surrounding vehicle information acquiring unit 23 determines that the second vehicle is a two-wheeled vehicle, it extracts image portions such as characters and symbols from the image portion of the two-wheeled vehicle and executes processing for recognizing the license plate.

When the surrounding vehicle information acquisition unit 23 determines that the second vehicle is a two-wheeled vehicle, the reverse driving notification unit 24 detects the first vehicle 1 and the second vehicle by the following method. Detects that one of the vehicles is running in reverse.

Here, FIG. 2 shows a situation in which the first vehicle 1 and the second vehicles 100a and 100b are traveling on a one-way road 200 in a specified direction (to the left in the drawing). In this situation, the license plate 101a is recognized from the image of the second vehicle 100a captured by the front camera 41. FIG. Also, the license plate 101b is not recognized from the image of the second vehicle 100b captured by the rear camera 42. FIG.

On the other hand, in FIG. 3, the second vehicles 100c and 100d run on the one-way road 200 in the specified direction (to the left in the figure), and the first vehicle 1 runs on the one-way road 200 in the opposite direction to the specified direction (the left direction in the figure). to the right). In this situation, from the image of the second vehicle 100d captured by the front camera 41, the license plate 101d is not recognized. Also, from the image of the second vehicle 100c captured by the rear camera 42, the license plate 101c is recognized.

3, the second vehicles 100c and 100d run on the one-way road 200 in the opposite direction, and the first vehicle 1 runs on the one-way road 200 in the specified direction. The situation is the same if there is. That is, from the image of the second vehicle 100d captured by the front camera 41, the license plate 101d is not recognized. Also, from the image of the second vehicle 100c captured by the rear camera 42, the license plate 101c is recognized.

Therefore, the reverse driving notification unit 24, when the following first reverse driving determination condition or second reverse driving determination condition indicating the situation of FIG. 3 is satisfied, the first vehicle 1 and the second vehicle ( It is determined that one of the second vehicles 100c, 100d) is running in the reverse direction on the one-way road 200.
First reverse running determination condition: The surrounding vehicle information acquisition unit 23 determines that the second vehicle located in front of the first vehicle 1 is a two-wheeled vehicle, and recognizes the license plate.
Second reverse driving determination condition: The surrounding vehicle information acquisition unit 23 determines that the second vehicle located behind the first vehicle 1 is a two-wheeled vehicle, and the license plate is not recognized.

Then, the reverse-running notification unit 24 provides information for notifying that the first vehicle 1 or the surrounding second vehicle is running in the reverse direction when the first reverse-running determination condition or the second reverse-running determination condition is satisfied. is output by screen display on the display 43 and sound from the speaker 44 . In addition, the reverse-running notification unit 24 transmits reverse-running notification information rva (see FIG. 1) for notifying that the first vehicle 1 or a surrounding second vehicle is running in the reverse direction to the traffic information server 510 via the communication unit 40. Send.

When the traffic information server 510 receives the reverse-running notification information rva, the traffic information server 510 notifies the other vehicles 300 and 301 traveling around the first vehicle 1 of the existence of the reverse-running vehicle, as shown in FIG. reverse-running vehicle information rvi is transmitted.

[2. Reverse running detection process]
The procedure of the reverse-running detection process executed by the reverse-running detection system 10 will be described according to the flowcharts shown in FIGS. The reverse-running detection system 10 repeatedly executes the processing according to the flowcharts of FIGS. 4 and 5 while the first vehicle 1 is running.

At step S1 in FIG. 4, the one-way road travel recognition unit 21 recognizes the type of road on which the first vehicle 1 is traveling. In subsequent step S2, the one-way road travel recognition unit 21 advances the process to step S3 when the road on which the vehicle is traveling is an expressway, and advances the process to step S1 when the road on which the vehicle is traveling is not an expressway. Here, the expressway is a one-way road and means a motorway with a speed limit equal to or higher than a predetermined speed.

In step S<b>3 , the peripheral vehicle recognition unit 22 captures an image of the front of the first vehicle 1 using the front camera 41 . In subsequent step S4, the peripheral vehicle recognition unit 22 analyzes the image captured by the front camera 41 (front image). In the next step S5, the peripheral vehicle recognition unit 22 proceeds to step S20 when the second vehicle is recognized from the forward photographed image, and proceeds to step S6 when the second vehicle is not recognized.

In step S20, the peripheral vehicle information acquiring unit 23 analyzes the image of the second vehicle to determine whether the second vehicle is a two-wheeled vehicle. to recognize the license plate of the vehicle. In subsequent step S21, the peripheral vehicle information acquisition unit 23 determines whether the first reverse driving determination condition is met, that is, whether the second vehicle is a two-wheeled vehicle and the license plate is recognized. Then, the surrounding vehicle information acquisition unit 23 advances the process to step S40 in FIG. 5 when the first reverse driving determination condition is satisfied, and advances the process to step S6 when the first reverse driving determination condition is not satisfied.

In step S<b>6 , the peripheral vehicle recognition unit 22 captures an image behind the first vehicle 1 with the rear camera 42 . In subsequent step S7, the peripheral vehicle recognition unit 22 analyzes the image captured by the rear camera 42 (backward captured image). In the next step S8, the peripheral vehicle recognition unit 22 proceeds to step S30 when the second vehicle is recognized from the rear captured image, and proceeds to step S9 when the second vehicle is not recognized.

In step S30, the surrounding vehicle information acquisition unit 23 analyzes the image of the second vehicle to determine whether the second vehicle is a two-wheeled vehicle. When it is determined that the second vehicle is a two-wheeled vehicle, A process of recognizing a license plate of a two-wheeled vehicle is executed. In subsequent step S31, the peripheral vehicle information acquisition unit 23 determines whether the second reverse driving determination condition is satisfied, that is, whether the second vehicle is a two-wheeled vehicle and the license plate is recognized. Then, the surrounding vehicle information acquisition unit 23 advances the process to step S40 of FIG. 5 when the second reverse driving determination condition is satisfied, and advances the process to step S9 when the second reverse driving determination condition is not satisfied.

In step S<b>40 in FIG. 5 , the reverse driving notification unit 24 displays a reverse driving notification screen on the display 43 and outputs a reverse driving notification sound from the speaker 44 . In subsequent step S<b>41 , the reverse driving notification unit 24 transmits the reverse driving notification information rva to the traffic information server 510 through the communication unit 40 . As a result, as described above with reference to FIG. 1 , the wrong-way vehicle information rvi is transmitted from the traffic information server 510 to other vehicles traveling around the first vehicle 1 . The processing of steps S40 and S41 corresponds to the output of the reverse-running notification information of the present disclosure.

[3. Other embodiments]
In the above-described embodiment, an example in which the reverse-running detection system 10 is mounted on the first vehicle 1 is shown, but part or all of the configuration of the reverse-running detection system 10 may be configured by a server system such as the traffic information server 510. good too. In this case, for example, the processor of the server system functions as a one-way road travel recognition unit 21, a surrounding vehicle recognition unit 22, a surrounding vehicle information acquisition unit 23, and a reverse driving notification unit 24, and the front camera of the first vehicle 1 41 and the rear image captured by the rear camera 42 of the first vehicle 1 are transmitted from the first vehicle 1 to the server system, and the server system executes processing for recognizing reverse driving.

In the above-described embodiment, the reverse-running notification unit 24 detects the second vehicle that satisfies the first reverse-running determination condition or the second reverse-running determination condition by the processing of the flowcharts of FIGS. 4 and 5 . It is determined that the first vehicle or the second vehicle is running in the reverse direction, and reverse-running notification information is output. As another embodiment, when the reverse driving notification unit 24 recognizes the second vehicle that satisfies the first reverse driving determination condition and the second vehicle that satisfies the first condition is recognized, A configuration for determining that the first vehicle or the second vehicle is running in the reverse direction and outputting reverse-running notification information when the second vehicle that satisfies the second reverse-running determination condition is recognized within a predetermined period of time. good too. In addition to or instead of this, based on an image acquired within a predetermined period after the acquisition of the image from which the second vehicle that satisfies the first reverse travel determination condition is acquired, the second reverse travel is performed. When the second vehicle that satisfies the determination condition is recognized, it may be determined that the first vehicle or the second vehicle is running in the reverse direction, and the reverse running notification information may be output. According to these configurations, it is expected that the accuracy of the reverse running determination is improved compared to the case where the reverse running is determined only by the satisfaction of the first reverse running determination condition or the satisfaction of the second reverse running determination condition. can.

In the above embodiment, when a plurality of second vehicles satisfying the first reverse-running determination condition are recognized, when a plurality of second vehicles satisfying the second reverse-running determination condition are recognized, and when the first reverse-running determination condition is recognized. When the second vehicle that satisfies the running determination condition and the second vehicle that satisfies the second reverse running determination condition are recognized, the direction in which the plurality of second vehicles are running is It can be estimated that the first vehicle 1 is traveling in the opposite direction in the direction restricted by the one-way road. Therefore, in this case, the reverse driving notification unit 24 displays a reverse driving notification screen for notifying that the first vehicle 1 is driving in the reverse direction on the display 43, and also displays that the first vehicle 1 is driving in the reverse direction. You may make it output the audio|voice which alert|reports from the speaker 44. FIG. Also, the reverse-running notification information rva for notifying that the first vehicle 1 is running in the reverse direction may be transmitted to the traffic information server 510 .

In the above-described embodiment, by performing inter-vehicle communication between a plurality of first vehicles 1, each first vehicle 1 can receive the traveling conditions of other first vehicles 1 and the first reverse It is also possible to adopt a configuration in which information on whether the running determination condition and the second reverse running determination condition are satisfied or not is acquired. According to this configuration, when the one-way road travel recognition unit 21 recognizes that the plurality of first vehicles 1 are traveling on the same one-way road in the same direction, the plurality of first vehicles 1 , when the second vehicle that satisfies the first reverse-running determination condition or the second reverse-running determination condition is recognized, it can be estimated that the second vehicle is running in the reverse direction on the one-way road. Therefore, in this case, the reverse-running notification unit 24 displays a reverse-running notification screen on the display 43 to notify that the second vehicle is running in the reverse direction, and notifies that the first vehicle 1 is running in the reverse direction. You may make it output the audio|voice which alert|reports from the speaker 44. FIG. In addition, it is also possible to transmit to the traffic information server 510 the reverse driving notification information rva for notifying that the second vehicle is driving in the reverse direction.

Alternatively, the one-way road travel recognition unit 21, the peripheral vehicle recognition unit 22, the peripheral vehicle information acquisition unit 23, and the reverse travel notification unit 24 are configured by a server system, and each of the plurality of first vehicles 1 is transmitted to the server system. The traveling condition data of the first vehicle and the image data captured by the cameras 41 and 42 may be transmitted. According to this configuration, the processing in the server system satisfies the first reverse driving determination condition or the second reverse driving determination condition for a plurality of first vehicles traveling in the same direction on the same one-way road. By recognizing the two vehicles, it is possible to output reverse-running notification information for notifying the second vehicle running in the reverse direction.

In the above embodiment, a two-wheeled vehicle was exemplified as a specific type of vehicle in which a license plate is attached only to the rear portion of the front portion and the rear portion of the vehicle body. Reverse running can also be recognized by the same processing for the vehicle and the first vehicle 1 .

In the above-described embodiment, a highway is exemplified as a one-way road, but reverse driving can also be detected by the reverse-running detection system of the present disclosure for the first and second vehicles traveling on one-way roads other than highways. is.

In addition, FIG. 1 is a schematic diagram showing the configuration of the reverse-running detection system 10, divided according to the main processing contents, in order to facilitate understanding of the present invention. Other divisions may be used. Also, the processing of each component may be executed by one hardware unit or may be executed by a plurality of hardware units. Further, the processing of each component according to the flowcharts shown in FIGS. 4 and 5 may be executed by one program or may be executed by a plurality of programs.

[4. Configuration supported by the above embodiment]
The above embodiment supports the following configurations.
(Configuration 1) A one-way road travel recognition unit that recognizes that a first vehicle is traveling on a one-way road, and a surrounding vehicle recognition unit that recognizes a second vehicle positioned in front or behind the first vehicle. , based on an image of the second vehicle taken by a camera provided in the first vehicle, the second vehicle is a specific type of vehicle in which a license plate is attached only to the rear portion of the vehicle body between the front portion and the rear portion. surrounding vehicle information acquisition unit for executing processing for recognizing a license plate from the photographed image when the second vehicle is determined to be the specific type of vehicle; In a state in which the recognition unit recognizes that the first vehicle is traveling on a one-way road, the surrounding vehicle recognition unit recognizes that the first vehicle is located in front of the first vehicle, and A first reverse driving determination condition that the peripheral vehicle information acquisition unit determines that the vehicle is of the specific type and that the license plate is not recognized, or the peripheral vehicle recognition unit determines that the vehicle is located behind the first vehicle. The second vehicle that satisfies a second reverse driving determination condition that the surrounding vehicle information acquisition unit determines that the second vehicle is the specific type of vehicle and recognizes the license plate. A reverse-running detection system, comprising: a reverse-running notification unit that outputs reverse-running notification information when it is recognized.
In the reverse driving detection system of configuration 1, when the license plate of the specific type of vehicle located in front of the first vehicle is not recognized in a situation where the first vehicle is traveling on a one-way road (first reverse driving determination condition is established), and when the license plate of a specific type of vehicle located behind the first vehicle is recognized (when the second reverse driving determination condition is established), the first vehicle and the second vehicle It can be determined that one of the two is running in the reverse direction. Therefore, the reverse-running notification unit outputs reverse-running notification information when it recognizes these cases. According to the reverse-running detection system of configuration 1, a reverse-running vehicle is detected for a general situation in which a vehicle with a license plate attached only to the rear of the vehicle body is running on a one-way road. As a result, it is possible to suppress the occurrence of an omission in detection of a vehicle running in the wrong direction.

(Configuration 2) The reverse-running notification unit recognizes the second vehicle that satisfies the first reverse-running determination condition and after recognizing the second vehicle that satisfies the first condition. The reverse-running detection system according to configuration 1, wherein the reverse-running notification information is output when the second vehicle that satisfies the second reverse-running determination condition is recognized within a predetermined period of time.
According to the reverse-running detection system of configuration 2, the reverse-running notification unit performs the first detection (detection by the captured image of the front of the first vehicle by the camera) before the first vehicle and the second vehicle pass by facing each other. , the license plate of the second vehicle is not detected, and the license plate of the second vehicle is detected in the subsequent detection (detection by the image captured by the camera behind the first vehicle), the first vehicle or the second vehicle is detected. It is determined that the vehicle is running in reverse. In this way, it is expected to improve the accuracy of the judgment of reverse running by not judging reverse running only by the first image taken in front, but also considering the judgment by the next captured image of the rear. can.

(Configuration 3) Configuration 1 or Configuration 2, wherein the one-way road travel recognition unit recognizes that the first vehicle is traveling on a one-way road whose speed limit is equal to or higher than a predetermined speed. The reverse running detection system described in .
According to the wrong-way-running detection system of configuration 3, it is possible to suppress the occurrence of wrong-way-running vehicle detection omissions for expressways that are greatly affected by traffic disturbances caused by reverse-running.

(Configuration 4) When the reverse-running notification unit recognizes a plurality of the second vehicles satisfying the first reverse-running determination condition, the reverse-running notification unit recognizes a plurality of the second vehicles satisfying the second reverse-running determination condition. , and when recognizing the second vehicle satisfying the first reverse-running determination condition and the second vehicle satisfying the second reverse-running determination condition, the first vehicle reverses. The reverse-running detection system according to any one of configurations 1 to 3 for outputting the reverse-running notification information indicating that the vehicle is running.
In the reverse-running detection system of configuration 4, when a plurality of second vehicles satisfying the first reverse-running determination condition are recognized, when a plurality of second vehicles satisfying the second reverse-running determination condition are recognized, and when the first If either the second vehicle that satisfies the second reverse driving determination condition or the second vehicle that satisfies the second reverse driving determination condition is recognized, the second vehicle with the greater number of running vehicles is the second vehicle. , can be assumed to be traveling in the correct direction on a one-way street. Therefore, in this case, the reverse driving notification section can output reverse driving notification information for notifying that the first vehicle is driving in the reverse direction.

(Configuration 5) The one-way road travel recognition unit recognizes a plurality of the first vehicles traveling on the same one-way road in the same direction. When the second vehicle that satisfies the first reverse running determination condition or the second reverse running determination condition is recognized with respect to the first vehicle, the reverse running is notified that the second vehicle is running in the reverse direction. The reverse-running detection system according to any one of configurations 1 to 4 for outputting running notification information.
According to the reverse running detection system of Configuration 5, a plurality of first vehicles traveling in the same direction travel in the same direction on a one-way road, and the second vehicle travels in the opposite direction to the first vehicle. Under such circumstances, it is possible to estimate that the second vehicle is running in the reverse direction, and to output reverse-running notification information for notifying that the second vehicle is running in the reverse direction.

DESCRIPTION OF SYMBOLS 1... 1st vehicle, 10... Reverse driving detection system, 20... Processor, 21... One-way road driving recognition part, 22... Surrounding vehicle recognition part, 23... Surrounding vehicle information acquisition part, 24... Reverse driving notification part, 30... Memory 31 Program 32 Vehicle type data 40 Communication unit 41 Front camera 42 Rear camera 43 Display 44 Speaker 45 Navigation device 100a-100d Second vehicle 101a- 101d... license plate, 200... one-way road, 500... communication network, 510... traffic information server.

Claims (5)

a one-way road travel recognition unit that recognizes that the first vehicle is traveling on a one-way road;
a peripheral vehicle recognition unit that recognizes a second vehicle positioned in front or behind the first vehicle;
Based on an image of the second vehicle taken by a camera provided in the first vehicle, the second vehicle is a specific type of vehicle in which a license plate is attached only to the rear portion of the front portion and the rear portion of the vehicle body. a peripheral vehicle information acquisition unit that determines whether or not the second vehicle is the specific type of vehicle, and executes processing for recognizing a license plate from the captured image;
While the one-way road travel recognition unit recognizes that the first vehicle is traveling on a one-way road, the surrounding vehicle recognition unit recognizes that the first vehicle is positioned in front of the first vehicle. and a first reverse driving determination condition that the peripheral vehicle information acquisition unit determines that the vehicle is of the specific type and the license plate is not recognized, or the peripheral vehicle recognition unit determines that the first vehicle and that the peripheral vehicle information acquisition unit determines that the vehicle is of the specific type and recognizes the license plate. a reverse driving notification unit that outputs reverse driving notification information when the second vehicle is recognized;
reverse run detection system. The reverse-running notification unit recognizes the second vehicle that satisfies the first reverse-running determination condition, and within a predetermined period after recognizing the second vehicle that satisfies the first condition. , outputting the reverse-running notification information when the second vehicle that satisfies the second reverse-running determination condition is recognized;
The reverse running detection system according to claim 1. 3. The one-way road travel recognition unit recognizes that the first vehicle is traveling on a one-way road whose speed limit is equal to or higher than a predetermined speed. Reverse run detection system. The reverse run notification unit
When a plurality of the second vehicles satisfying the first reverse-running determination condition are recognized, when a plurality of the second vehicles satisfying the second reverse-running determination condition are recognized, and when the first reverse-running determination condition is satisfied. When the second vehicle and the second vehicle satisfying the second reverse-running determination condition are recognized, the reverse-running is notified that the first vehicle is running in the reverse-running direction. The reverse-running detection system according to any one of claims 1 to 3, which outputs notification information. The reverse run notification unit
In a state in which a plurality of the first vehicles traveling in the same direction on the same one-way road are recognized by the one-way road travel recognition unit,
When the second vehicle that satisfies the first reverse-running determination condition or the second reverse-running determination condition is recognized among the plurality of first vehicles, it is notified that the second vehicle is running in the reverse direction. The reverse-running detection system according to any one of claims 1 to 4, wherein the reverse-running notification information is output.

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