JP5199654B2 - Reverse running vehicle warning system - Google Patents

Description

  The present invention relates to a safe driving support system on a highway, and in particular, corresponds to an intelligent transport system (ITS) and automatically detects, warns, and notifies a vehicle that runs backward on the highway. It relates to a system that can be used.

  As is well known, there is a big proposition to eliminate congestion and prevent reverse running when operating a motorway, generally called a highway, but here about traffic congestion due to toll payment at the tollgate, The so-called ETC (Electronic Toll Collection System) has been widely adopted as a practical technology and has greatly contributed to eliminating traffic congestion.

  In this ETC, a wireless communication system called DSRC (Dedicated Short-Range Communication) is usually adopted.

  On the other hand, most of the measures that have been taken to prevent reverse running have been to call attention only by road signs and guide signs. In this case, it depends on the driver's approach to compliance with regulations. Therefore, the effectiveness is poor and the reliability is low.

  However, in the case of a highway, if there is a vehicle that runs backward, there is a high probability that an accident will occur, and there is a high possibility of a major accident.

  Therefore, for example, Patent Document 1 proposes the following two methods.

  The first is a reverse running warning system using a dedicated roadside device and a dedicated vehicle-mounted device, which is installed near the entrance toll gate of the existing ETC system and communicates radio waves in a frequency band different from that of the ETC system. The roadside device dedicated to reverse running warning used in the system keeps sending information in the communication area, and when the vehicle-mounted device continues to receive information from the roadside device, it gives a warning to warn against reverse running It is.

Next, the second is a reverse running detection system using an existing ETC OBE, which is a subroutine program and voice data added to the existing ETC OBE, which triggers the passage of the entrance toll gate. And then a warning that calls attention to reverse running for a certain period of time.
JP 2007-102443 A

  The first and second prior arts give a warning to all passing vehicles regardless of whether the vehicle is running backward.

  For this reason, there is a possibility that the warning is heard and cannot be received seriously.

  At this time, since the first conventional technology is communication between the dedicated roadside device and the dedicated vehicle-mounted device, there is no limitation on the application location. However, in these first and second conventional technologies, detection of the reverse running vehicle is not possible. There was a problem that I could not.

  In the first prior art, it is not possible to use the existing ETC on-vehicle device, and it is essential to purchase a dedicated on-vehicle device.

  On the other hand, in the case of the second prior art, it can be used with an existing ETC on-board device. However, remodeling such as addition of a subroutine program and audio data is essential for the ETC on-board unit.

  Therefore, in the case of the first and second prior arts, no consideration is given to the premise of detecting a reverse running vehicle, and the warning is merely to alert the driver. There was a problem in preventing reverse running.

  In other words, regardless of whether there is a reverse running vehicle, anyway, a warning is given to the vehicle just by passing through the entrance toll gate, and in this case, be careful not to run backward. Since it is only aroused, the warning is heard and may not be taken seriously, thus causing a problem in preventing reverse running.

  In other words, these conventional techniques cannot detect a reverse running vehicle, and therefore cannot warn the reverse running vehicle.

  The present invention aims at the following points.

  The first purpose is to detect / identify reverse running vehicles.

  The second purpose is to warn only the detected / identified reverse running vehicle.

  The third purpose is to notify other vehicles of the presence of a reverse running vehicle.

  The fourth purpose is to make it available on existing ETC in-vehicle devices without imposing a burden on the user.

  In order to achieve the first object, the first means is a vehicle-mounted wireless device mounted on a passing vehicle using a DSRC communication similar to that of the ETC system as a wireless communication method, using an ETC communication sequence as a communication sequence. In addition, it is possible to detect / specify a reverse running vehicle by reading / writing identification information of an electronic storage medium that can be inserted into and removed from the in-vehicle wireless device, and determining the identification information.

  In order to achieve the second object, the second means forms a narrow communication area by using DSRC communication, and identifies the vehicle-mounted device communicating with the first means. It is possible to give a warning only to the reverse running vehicle detected / specified by the above.

  In order to achieve the third object, the third means installs another roadside radio device in the vicinity of a branch point to the road where the roadside radio device for detecting / warning the reverse run is installed, and the roadside radio device Communicates with the reverse-travel detection / warning roadside wireless device, so that when a reverse-travel vehicle is present, the road-side wireless device allows the reverse-travel vehicle to exist with respect to a vehicle that has entered from a normal direction. Is.

  In order to achieve the fourth object, the fourth means uses the ETC communication sequence to enable the user to use the system of the present invention with an existing ETC on-board device without any change. It is.

  According to the present invention, a base station antenna is installed near the entrance or exit of a one-way street, and DSRC is used for its wireless communication method, so that it will run backward without affecting surrounding vehicles. It is possible to detect the vehicle that is being used and to issue a warning only to the vehicle. In addition, by installing a reverse running vehicle notification system in combination with the reverse running vehicle detection / warning system, it is possible to notify / warn the vehicle entering from a normal direction of the presence of the reverse running vehicle.

  Furthermore, in the present invention, by using the ETC communication sequence, it becomes possible for the user to receive the service with the existing ETC on-board device without any change.

  Hereinafter, the reverse running vehicle detection system, the reverse running vehicle warning system, and the reverse running vehicle notification system according to the present invention will be described in detail with reference to each embodiment.

First Embodiment FIG. 1 is a first embodiment of a reverse running vehicle detection / warning system and a reverse running vehicle notification system according to the present invention, both of which are one-way paths as shown. With the approach path (entrance path) 22 and the exit path (departure path) 23, the vehicle exits from the main line 21 of the expressway and enters, and then a resting facility 20 provided so that it can arbitrarily exit, Two roadside radio devices 10 and 11 are installed on the approach path 22, and at this time, one roadside radio apparatus 10 is installed near the exit of the approach path 22, that is, near the end of the rest facility side road, The other roadside apparatus 11 is also installed in the vicinity of the entrance of the approach path 22, that is, in the vicinity of the main road side road end.

  The rest facility 20 at this time is equipment such as a service area and a parking area incidental to an automobile exclusive road (hereinafter referred to as a highway). Therefore, in FIG. The roadside wireless device 10 installed near the road functions as a reverse running detection / warning system, and when the reverse running vehicle 31 appears, the detection and warning is given to the reverse running vehicle 31, and the main road The roadside apparatus 11 installed in the vicinity of the end functions as a reverse running vehicle notification system, and notifies and warns the existence of the reverse running vehicle to the vehicle 33 entering from a normal direction. An example will be shown.

  First, the roadside apparatus 10 includes at least one base station antenna 101 for mobile communication and a processing apparatus 102 that performs control and data accumulation necessary for system operation, as shown in the figure. It is installed in the vicinity of the break facility side road end of the approach path 22, that is, in the vicinity of the exit of the approach path 22. Next, the roadside apparatus 11 includes at least one base station antenna 111 for mobile communication, and a processing unit 112 that performs control and data accumulation necessary for system operation. In the vicinity of the main road side road end of the approach path 22, that is, in the vicinity of the exit of the approach path 22.

  FIG. 2 shows details of the roadside radio apparatuses 10 and 11. At this time, one roadside radio apparatus 10 corresponds to a reverse running vehicle detection / warning system, and the other roadside radio apparatus 11 runs backward. It corresponds to the vehicle notification system. The base station antennas 101 and 111 here correspond to the DSRC communication system adopted in the existing ETC, and are mounted on the vehicle under the control of the processing devices 102 and 112. Information is transmitted by in-vehicle wireless devices and road-to-vehicle communication using 5.8 GHz band radio waves.

  And the communication sequence between the road vehicles at this time presupposes the utilization of the communication sequence in the existing ETC similarly.

  The DSRC used here is positioned as a short-distance / small-zone two-way mobile communication. Therefore, according to the base station antenna for mobile communication used in the ETC system, A communication area can be formed, and it is possible to selectively communicate only with an in-vehicle device (on-vehicle wireless device) mounted on a vehicle that has entered the area, thereby limiting the vehicles to be communicated and adjacent lanes There is a feature that it is possible to prevent the vehicle from being affected. And because of this feature, according to this DSRC, it is also possible to acquire the identification information of the on-vehicle device from the on-vehicle device. In this case, by using the acquired identification information, the in-vehicle device that is communicating can be obtained. It is also possible to identify and thus identify the vehicle.

  Next, FIG. 3 and FIG. 4 show schematic views of in-vehicle wireless devices that can use the present invention, for example, in-vehicle wireless devices 30 and 33 in FIG. At this time, FIG. 3 is a schematic diagram showing an example of an in-vehicle wireless device when an electronic recording medium 306 that can be inserted and removed is used for data storage, and FIG. 4 shows an internal information storage unit for data storage. It is the schematic which shows an example of the vehicle-mounted radio | wireless apparatus at the time of using 315. FIG.

  Here, first, the in-vehicle wireless device of FIG. 3 includes a control unit 301, a display unit 302, an antenna unit 303, a speaker 304, and an electronic recording medium socket 305. Then, by inserting the electronic recording medium 306 into the electronic recording medium socket 305, the present invention and the ETC system can be used. Next, the in-vehicle wireless device of FIG. 4 includes a control unit 311, a display unit 312, and an antenna unit 313. The speaker 314 and the information storage unit 315 are used as they are.

  In addition, the vehicle-mounted radio | wireless apparatus which can insert / remove the electronic recording medium at this time may be an existing ETC vehicle-mounted device.

  Next, FIG. 5 shows an example of a flowchart of the reverse running vehicle detection / warning process executed by the processing device 102 of the roadside apparatus 10 in the first embodiment. Processing will be described.

  In FIG. 1, a vehicle 33 equipped with an in-vehicle wireless device 32 enters the approach road 22 from the main road 21 and the communication formed by the base station antenna 101 constituting the roadside wireless device 10 for reverse running vehicle detection / warning. It is assumed that the vehicle has entered the area, that is, the vicinity of the road edge on the break facility side of the approach path 22. At this time, if the processing according to this flowchart has been started (S10), road-to-vehicle communication between the roadside apparatus 10 and the in-vehicle wireless apparatus 32 becomes possible.

  Therefore, first, the roadside apparatus 10 and the in-vehicle wireless apparatus 32 start road-to-vehicle communication (S11), and the electronic recording medium 305 (in the case of FIG. 3) or information in which the roadside apparatus 10 is inserted in the in-vehicle wireless apparatus 30 Information is read from the storage unit 315 (in the case of FIG. 4) (S12), and it is then checked whether or not discrimination information indicating that the vehicle has entered the break facility 20 is written in the read information (S13). ).

  At this time, it is assumed that the discrimination information is not written in the read information. This is naturally the case in the case of the vehicle 33, that is, the vehicle that has entered the approach road 22 from the main line 21 of the highway.

  Therefore, in this case, since the determination result in the process S13 is NO (No), the roadside wireless device 10 provides the information storage unit 315 with information for determining that the vehicle-mounted wireless device 33 has entered the resting facility 20. Alternatively, it is instructed to write in a place (an empty area in the memory) that does not affect the billing of the ETC system in the electronic recording medium 306 (S15), and the road-to-vehicle communication is terminated here (S18), and the process ends (S19 ).

  As a result, any vehicle that enters the resting facility 20 from the main road 21 of the expressway through the approach path 22 is surely written with information for determining entry into the resting facility 20.

  In addition, when writing the information which discriminate | determines that it approached at this time, you may deliver various guidance information etc. collectively.

  On the other hand, when the vehicle that has entered the break facility 20 tries to leave the break facility 20 in this way, for example, as indicated by the vehicle 31 in FIG. Suppose.

  Then, in this case, the vehicle 31 again enters the communication area of the base station antenna 101 that configures the roadside radio device 10 for reverse running vehicle detection / warning, and road-to-vehicle communication is resumed here (S10). (S11), and information is read from the information storage unit 315 or the electronic recording medium 306 of the in-vehicle wireless device 30 (S12). In this case, the information read by the roadside apparatus 10 includes information for determining that the user has entered the resting facility 20.

  Therefore, the roadside apparatus 10 determines that the determination result in the process S13 is YES (affirmed), the vehicle 31 is traveling backward (S14), and represents the backward traveling with respect to the in-vehicle wireless apparatus 30. The vehicle-mounted device instruction information is transmitted (S16), and the presence of the reverse running vehicle is notified to the roadside apparatus 11 of the reverse running vehicle notification system (S17).

  Therefore, the in-vehicle wireless device 30 of the vehicle 31 displays the received in-vehicle device instruction information on the display unit 302 (FIG. 3) or the display unit 312 (FIG. 4), and from the speakers 304 (FIG. 3) and 314 (FIG. 4). Tell the user that the car is running backwards by issuing a sound output or warning sound.

  After the process S17, the road-to-vehicle communication is terminated (S18), and the process is terminated (S19).

  At this time, the information written to the information storage unit 315 or the electronic recording medium 306 of the in-vehicle wireless device 30 by the roadside wireless device 10, that is, the information for determining the entry of the vehicle is overwritten and deleted when the vehicle 31 passes through the ETC system. Shall be.

  Therefore, according to this embodiment, as indicated by the vehicle 31, when entering the approach path 22 for some reason, it can be reliably detected as a reverse running vehicle.

  In addition, you may use intrinsic | native information, such as onboard equipment or an IC card, as a method of detecting a reverse running vehicle.

  However, in the case of the method of writing the discrimination information on the IC card, the vehicle in which the IC card is not inserted cannot use the present invention. As an example of the solution at this time, the radio station identification number unique to the vehicle-mounted device A method using (WCN: Wireless Call Number) can be mentioned.

  This is because the WCN can acquire information from the in-vehicle wireless device even when the IC card is not inserted. In this case, the WCN acquires information by road-to-vehicle communication, and the acquired WCN and the passing time of the vehicle are used as roadside wireless. By accumulating in the device, a reverse running vehicle is detected.

  That is, when the vehicle passes through the roadside wireless device, if the vehicle's WCN exists in the roadside wireless device, and the difference between the passing time of the vehicle and the current time is within a predetermined time, the vehicle It is judged that is running backward.

  Next, FIG. 6 shows an example of a flowchart in the case of a reverse running vehicle notification process. In this case, after the start of the process (S20), the roadside wireless device 11 for reverse running vehicle notification is shown in the flowchart of FIG. The reverse running vehicle information is acquired from the reverse running vehicle detection system described in step S21 (S21). After that, waiting for the vehicle to pass (S22). When the result is NO, that is, when there is no passing vehicle, the process returns to step S21. . Therefore, until the passing vehicle appears, the roadside apparatus 11 for notifying a reverse running vehicle does not perform any particular processing.

  If there is a passing vehicle, that is, if the result in step S22 is YES, it is checked whether or not the next acquired information includes reverse running vehicle information. If the result is NO, the process returns to step S21. Accordingly, no particular processing is performed until reverse running vehicle information appears. Therefore, at this time, another process, for example, distribution of various types of guidance information may be performed.

  If the result of processing S23 is YES, road-to-vehicle communication is carried out with a vehicle-mounted wireless device mounted on a vehicle passing through the roadside wireless device 11 (S24), and a warning is made that a reverse running vehicle exists. OBE instruction information is transmitted (S25). That is, when there is a vehicle that has entered the approach path 22 from the main road 21, for example, the vehicle 33, the vehicle-mounted wireless device 32 receives the vehicle-mounted device instruction information that warns that a reverse running vehicle exists, and as a result, The presence of a reverse running vehicle is notified.

  Therefore, as a result, the in-vehicle wireless device 32 of the vehicle 33 displays the received in-vehicle device instruction information on the display units 302 and 312 and emits a sound or a warning sound from the speakers 304 and 314, thereby causing the vehicle to run backward. Warning that exists.

  Therefore, according to this embodiment, when there is a reverse running vehicle, it is possible to notify the vehicle that may be encountered, for example, the vehicle 33, that the reverse running vehicle exists, and as a result, The occurrence of dangerous situations can be suppressed in advance.

  Note that the presence of the reverse running vehicle at this time may be alerted using a display or the like installed on the road side without using wireless communication.

Second Embodiment Next, FIG. 7 shows a second embodiment of the present invention, which is an example of a reverse running vehicle detection / warning system according to the present invention in which a vehicle detector is used to detect a reverse running vehicle. It is. This system also uses a roadside radio apparatus 10 including at least one base station antenna 101 for mobile communication and a processing apparatus 102 for controlling the base station antenna 101 and storing data. The first set of vehicle detectors 103 and the second set of vehicle detectors 104 are used and installed in the communication area 105 formed by the base station antenna 101, so that they run backward on the approach path and the exit path. It is one Embodiment at the time of making it detect a vehicle.

  Here, each of the vehicle detectors 103 and 104 includes, for example, a light emitter and a light detector arranged in pairs on one side and the other side of the vehicle travel path of the communication area 105, and between the vehicle and the like. When an object is present, it can be detected. At this time, one set of vehicle detectors 103 and the other set of vehicle detectors 104 are separated by a predetermined distance in the length direction of the vehicle travel path, The vehicle traveling direction of the vehicle can be detected by the difference in object detection timing between the vehicle detector 103 and the vehicle detector 104. For example, when the illustrated vehicle 31 is a reverse running vehicle, it can be determined that the vehicle 31 is a reverse running vehicle when the detection timing by the vehicle detector 104 comes first.

  At this time, FIG. 8 is a flowchart showing an example of processing according to the embodiment of FIG. 7, and will be described below with reference to the flowchart of FIG.

  Assuming that the vehicle 31 enters the communication area 105 in the direction shown in the figure, the vehicle detector 104 first detects the vehicle 31 and then the vehicle detector 103 detects the vehicle 31. Is received by the roadside apparatus 10 (S31). Accordingly, the processing device 102 of the roadside apparatus 10 determines the traveling direction of the vehicle 31 based on the both-pass detection signals supplied from both the vehicle detector 103 and the vehicle detector 104 (S32). If the determination result is NO, that is, if it is not reverse running, the process returns to step S31. Therefore, if there is no reverse running, nothing is done.

  On the other hand, if the determination in step S32 is YES, that is, it is determined that the vehicle is running backward, the roadside apparatus 10 and the in-vehicle wireless apparatus 30 perform road-to-vehicle communication (S33). Here, as described above, it is determined that the vehicle is running backward, when the detection timing by the vehicle detector 104 comes first, and in this case, the roadside apparatus 10 continues to run backward. Instruction information is transmitted (S34), and when the in-vehicle wireless device 30 is warned of reverse running, the road-to-vehicle communication is terminated (S35).

  As a result, the in-vehicle wireless device 30 of the vehicle 31 displays the received in-vehicle device instruction information on the display units 302 and 312 and emits a sound or a warning sound from the speakers 304 and 314, thereby reversely driving the driver. Will be communicated.

  In the case where there is no reverse running, that is, when the determined traveling direction is correct, as described above, road-to-vehicle communication is not performed between the roadside wireless device 10 and the in-vehicle wireless device 30. Inter-vehicle communication may be performed to distribute various types of guidance information.

Third Embodiment Next, FIG. 9 shows a third embodiment of the present invention. This is a roadside radio device installed near an existing ETC toll booth, and runs backward to the main highway or general road. A vehicle detection / warning system for reverse running and a roadside wireless device near the entrance of the exit from the expressway will be installed to notify / warn the vehicle entering from the normal direction of the vehicle. It is one Embodiment of this invention regarding the reverse running vehicle notification system.

  In FIG. 9, roadside apparatuses 10 and 13 have the same configuration and function as a reverse running vehicle detection / warning system, respectively. The roadside wireless devices 11 and 12 also have the same configuration and function as a reverse running vehicle notification system. The details of the roadside apparatuses 10 and 11 are as already described with reference to FIG.

  First, the roadside apparatus 10 is installed in the vicinity of the exits of the exit roads 220 and 221 exiting from one main highway 200 and the other main highway 201, and detects a vehicle that runs backward on the exit roads 220 and 221. And act to warn the vehicle.

  Next, the roadside wireless devices 11 and 12 are installed in the vicinity of the entrances of the exit roads 220 and 221 respectively, and notify the vehicles entering the exit roads 220 and 221 from the highway main lines 200 and 201 that there is a reverse running vehicle. To work.

  On the other hand, the roadside wireless device 13 is installed in the vicinity of the exit of the approach road 230 from the general road to the toll gate, detects a vehicle that runs backward on the approach road 230, and works to warn the vehicle. Although not shown, there is a roadside wireless device that is installed near the entrance of the approach road 230 and functions to notify the vehicle that is about to enter the approach road 230 from a general road to the presence of a reverse running vehicle. To do.

  At this time, 40 is an entrance ETC toll gate, 41 is an entrance general toll gate, 42 is an exit ETC toll gate, and 43 is an exit general toll gate.

  Next, FIG. 10 is a flowchart showing an example of the reverse running vehicle detection / warning process executed by the processing device 102 of the roadside apparatus 10 in this embodiment, which will be described below.

  Now, assuming that the vehicle 31 equipped with the in-vehicle wireless device 30 passes through the entrance ETC toll gate 40, the electronic recording medium 306 or the information storage unit 315 of the in-vehicle wireless device 30 at this time has entered the entrance ETC toll gate that has just passed. A number of 40 is written.

  Then, after that, it is assumed that the vehicle 31 tries to enter the exit paths 220 and 221 by mistake, rather than proceeding correctly to the approach paths 210 and 211.

  At this time, if the processing according to this flowchart has been started (S40), road-to-vehicle communication between the roadside apparatus 10 and the in-vehicle wireless apparatus 30 becomes possible.

  Therefore, first, the roadside apparatus 10 and the vehicle-mounted wireless apparatus 30 mounted on the vehicle 31 start road-to-vehicle communication (S41), and are stored in the electronic recording medium 306 or the information storage unit 315 from the vehicle-mounted wireless apparatus 30. An entrance toll gate number is acquired (S42).

  Next, it is checked whether or not the entrance toll gate number just acquired matches the number of the entrance ETC toll gate 40 through which the vehicle 31 passed immediately before (S43).

  First, when the result of determination in step S43 is NO, that is, when the acquired number of the entrance toll gate does not match the number of the entrance ETC toll gate 40, the road-to-vehicle communication ends here (S47). Is finished (S48).

  In the case of no reverse running, that is, when the acquired entrance toll booth number does not match the entrance ETC toll booth number, as described above, the road between the roadside radio device 10 and the in-vehicle radio device 30 is Although inter-vehicle communication is not performed, however, road-to-vehicle communication may be performed at this time to distribute various types of guidance information.

  Next, if the determination result in process S43 is YES, that is, if the acquired entrance toll gate number matches the entrance ETC toll gate 40 number, the roadside apparatus 10 determines that the vehicle 31 is running backward (S44). ).

  The reason is that when the vehicle enters the exit road 220 or the exit path 221 from a normal direction, that is, when the vehicle enters the exit path 220 or the exit path 221 from the main road of the expressway and passes the roadside radio device 10, the vehicle is acquired. This is because the number of the entrance ETC toll booth will not match the number of the entrance ETC toll booth 40 that is going to pass unless there is "special circumstances". If it matches, it will run backward.

  If the determination result in the process S43 is YES, then the in-vehicle device instruction information indicating the reverse running warning is transmitted to the in-vehicle wireless device 30 (S45).

  Therefore, the in-vehicle wireless device 30 displays the received in-vehicle device instruction information on the display units 302 and 312, and generates a voice or warning sound from the speakers 304 and 314 to warn the driver that the vehicle is running backward. .

  After that, the roadside wireless devices 11 and 12 functioning as a reverse running vehicle notification system are notified of the presence of the reverse running vehicle (S46), and the road-to-vehicle communication is terminated here (S47), and the process ends. (S48).

  Therefore, also by this embodiment, a reverse running vehicle can be detected reliably and it can be notified.

  Here, the above-mentioned “special circumstances” will be explained. This is because, for example, after the vehicle 31 passes through the entrance ETC toll gate 40 and correctly enters the highway main line 200, 201 from the approach road 210, 211, for some reason. This is the case when the user returns without returning from the expressway. In this case, the turn-back can occur when the above-described rest facility is present on the expressway.

  In this case, the roadside apparatus 10 actually matches the exit ETCs 220 and 221, but the entrance ETC toll gate numbers match, so the determination result in step S43 is YES. And the vehicle is determined to be a reverse running vehicle.

  Therefore, as an embodiment for dealing with this case, as a condition for the reverse run determination at this time, that is, as a determination condition in the process S44 of FIG. The difference between the passage time of the entrance toll gate and the current time may be within a predetermined time.

  Therefore, also by this embodiment, a reverse running vehicle can be detected reliably and it can be notified.

  Even in this embodiment, when the reverse traveling is not performed, that is, when the determined traveling direction is correct, the road-vehicle communication between the roadside wireless device 10 and the in-vehicle wireless device 30 is terminated as described above. However, it goes without saying that road-to-vehicle communication may be performed at this time to distribute various types of guidance information.

  Next, FIG. 11 is a flowchart showing an example of a reverse running vehicle detection / warning process for a general road in the third embodiment, and the process according to this flowchart will be described below.

  Now, a vehicle that has correctly passed the exit roads 220 and 221 from the main highways 200 and 201 and passed through the exit ETC toll booth 42 (facing backwards, but is referred to as a vehicle 31) enters the exit road 231 to the general road. Suppose that it is going to go to the approach road 230 from a general road accidentally.

At this time, if the processing according to this flowchart is started (S50), road-to-vehicle communication between the roadside apparatus 13 and the vehicle 31 becomes possible here.

Therefore, first, the roadside wireless device 13 and the vehicle-mounted wireless device 30 mounted on the vehicle 31 start road-to-road communication (S51), and are stored in the electronic recording medium 306 or the information storage unit 315 from the vehicle-mounted wireless device 30. An exit toll gate number is acquired (S52).

  Next, it is checked whether or not the exit toll gate number just acquired matches the number of the exit ETC toll gate 42 that the vehicle 31 has passed immediately before (S53).

  First, when the result of determination in step S53 is NO, that is, when the acquired exit tollgate number does not match the exit ETC tollgate number, the road-to-vehicle communication ends here (S57). Is finished (S58).

Even in this embodiment, when the vehicle is not running in reverse, that is, when the acquired exit tollgate number does not match the number of the exit ETC tollgate 42, as described above, the roadside wireless device 13 and the in-vehicle wireless device Although the road-to-vehicle communication between the terminals 30 is terminated, the road-to-vehicle communication may be performed at this time as well to distribute various types of guidance information.

Next, if the result of determination in step S53 is YES, that is, if the acquired exit toll gate number matches the exit ETC toll gate number, the roadside apparatus 13 determines that the vehicle 31 is running backward (S54). ).

  This is because when the vehicle 31 passes the exit ETC toll gate 42 and then enters the approach path 230, the number of the exit ETC toll gate acquired by the vehicle matches the number of the exit ETC toll gate 42. On the other hand, when entering the approach road 230 from a general road, there is no trap that has passed through the exit ETC toll booth 42 and there is no trap that matches the number. Because if it matches, it will run backward.

  If the decision result in the process S53 is YES, next, the in-vehicle device instruction information indicating the reverse running warning is transmitted to the in-vehicle wireless device 30 (S55).

  Therefore, the in-vehicle wireless device 30 displays the received in-vehicle device instruction information on the display units 302 and 312, and generates a voice or a warning sound from the speakers 304 and 314 to warn the driver that the vehicle is running backward.

  Thereafter, the roadside apparatus 13 notifies the reverse running vehicle notification system that there is a reverse running vehicle (S56), ends road-to-vehicle communication (S57), and ends the processing (S58). ).

  By the way, this embodiment also has the above-mentioned “special circumstances”. That is, when the vehicle 31 passes through the exit ETC toll booth 42 and correctly exits the exit road 231 to the general road, the number of the exit ETC toll booth 42 is stored in the vehicle 31. Therefore, when the vehicle enters the approach road 230 again as it is, the roadside wireless device 13 determines that the vehicle is running backward.

  Therefore, in the case of this embodiment as well, the reverse running determination condition at this time, that is, the determination condition in the process S53 of FIG. What is necessary is just to make it the condition that the difference between the passage time and the current time is within a predetermined time.

  Therefore, also by this embodiment, a reverse running vehicle can be detected reliably and it can be notified.

  As described above in detail, the present invention relates to a reverse running vehicle detection system that detects reverse running of a vehicle and a reverse running vehicle warning system that indicates a reverse running warning to the vehicle. It is possible to provide a new type of reverse running vehicle detection / warning system that can be used with existing ETC vehicle-mounted devices.

  In addition, the present invention provides a system for notifying / warning the presence of a reverse running vehicle to a vehicle entering from a normal direction by installing a reverse running vehicle notification system together with the reverse running vehicle detection / warning system. can do.

It is explanatory drawing which shows the 1st Embodiment of this invention. It is a block diagram which shows one Embodiment of the roadside apparatus in this invention. It is a block diagram which shows one Embodiment of the vehicle-mounted radio | wireless apparatus in this invention. It is a block diagram which shows other one Embodiment of the vehicle-mounted radio | wireless apparatus in this invention. It is a flowchart of the reverse running vehicle detection and warning process by the 1st Embodiment of this invention. It is a flowchart of the reverse running vehicle notification process by the 1st Embodiment of this invention. It is explanatory drawing which shows the 2nd Embodiment of this invention. It is a flowchart of the reverse running vehicle detection and warning process in the 2nd Embodiment of this invention. It is explanatory drawing which shows the 3rd Embodiment of this invention. It is a flowchart of the reverse vehicle detection and warning process to the high-speed main line by the 3rd Embodiment of this invention. It is a flowchart of the reverse running vehicle detection and warning process to the general road by the 3rd Embodiment of this invention.

Explanation of symbols

10, 13: Roadside radio device for detecting / warning a reverse running vehicle 11, 12: Roadside radio device for notifying a reverse running vehicle 20: Rest facility 21 ... Main road of highway 22: Approach road to rest facility 23: From rest facility Exit path 30, 32: vehicle-mounted wireless device 31, 33: vehicle 40: entrance ETC toll booth 41: entrance toll booth 42: exit ETC toll booth 43: exit exit toll booth 101, 111: base station antennas 102, 112: Processing device 103: First set of vehicle detectors 104: Second set of vehicle detectors 105: Communication area formed by base station antenna 200: One highway main line (for example, upstream)
201: The other highway main line (eg down)
210: One highway main road 211: The other highway main road 220: One highway main road 2211: The other highway main road 230: General road Approach road 231: Exit road to general road 301, 311: Control section 302, 312: Display section 303, 313: Antenna section 304, 314: Speaker 305: Electronic recording medium socket 306: Electronic recording medium 315: Information storage section

Claims (9)

In the reverse running vehicle warning system of the method of detecting the reverse running vehicle on the automobile exclusive road to which the automatic toll collection system is applied by detecting the passage of the vehicle by road-to-vehicle communication using the roadside radio device and the in-vehicle radio device,
The roadside wireless device is installed in the vicinity of the exit of the passage from the main road for automobiles to the exit ETC toll gate of the automatic toll collection system, and the roadside wireless device has a vehicle passing the vehicle-mounted wireless device. When detected, the detected vehicle has passed the entrance ETC toll gate of the automatic toll collection system, and the time when detected by the roadside radio device has passed the entrance ETC toll gate Means is provided for executing a process of determining that the vehicle is a reverse running vehicle within a predetermined time from the time,
When the reverse running vehicle is detected by the means for executing the process, the roadside wireless device transmits reverse running warning information to the in-vehicle wireless device of the reverse running vehicle using the road-to-vehicle communication, and the reverse running vehicle A reverse running vehicle warning system characterized in that a warning is given to the vehicle. In the reverse running vehicle warning system of the method of detecting the reverse running vehicle on the automobile exclusive road to which the automatic toll collection system is applied by detecting the passage of the vehicle by road-to-vehicle communication using the roadside radio device and the in-vehicle radio device,
After the roadside wireless device is installed in the vicinity of the exit of the passage from the general road to the entrance ETC toll gate of the automatic toll collection system, the roadside wireless device detects passage of a vehicle equipped with the in-vehicle wireless device. When the detected vehicle is a vehicle that has passed the exit ETC toll gate of the automatic toll collection system, and the time when detected by the roadside radio device is from the time that has passed the exit ETC toll gate Means is provided for executing a process of determining that the vehicle is a reverse running vehicle within a predetermined time set in advance ,
When the reverse traveling vehicle is detected by the processing means, the roadside wireless device uses the road-to-vehicle communication to transmit reverse traveling warning information to the in-vehicle wireless device of the reverse traveling vehicle, to the reverse traveling vehicle. A reverse running vehicle warning system, characterized in that a warning is given . In the reverse running vehicle warning system according to claim 1 or 2 ,
The roadside apparatus includes a base station antenna for mobile communication, a processing device for controlling the base station antenna and storing data,
A reverse traveling vehicle warning system , wherein wireless communication is performed with an in-vehicle wireless device mounted on a vehicle passing through a wireless communication area of the base station antenna . In the reverse running vehicle warning system according to claim 1 or 2 ,
The roadside wireless device reads identification information from an information storage unit or an electronic recording medium of the in-vehicle wireless device, accumulates the identification information, and detects a reverse running vehicle based on the accumulated identification information. Reverse running vehicle warning system. In the reverse running vehicle warning system according to claim 1 or 2 ,
The roadside wireless device detects the reverse running vehicle by writing the identification information of the roadside wireless device in an information storage unit or an electronic recording medium of the in-vehicle wireless device and reading the written identification information. Reverse running vehicle warning system. In the reverse running vehicle warning system according to claim 1 or 2 ,
The roadside wireless device reads the information of the ETC toll gate that the in-vehicle wireless device has passed immediately before from the information storage unit or electronic recording medium of the in-vehicle wireless device, and the read ETC toll gate information and the reverse running vehicle warning system A reverse running vehicle warning system that detects a reverse running vehicle by comparing information of an ETC toll booth where is installed . In the reverse running vehicle warning system according to any one of claims 1 to 6 ,
The roadside radio device is configured to display a warning on an indicator installed on the roadside when a reverse running vehicle is detected, and to give a warning to the reverse running vehicle. system. In the reverse running vehicle warning system according to claim 1,
Using at least one notification roadside radio device installed in the vicinity of the entrance to the exit ETC toll gate of the automatic toll collection system from the motorway main line,
The roadside radio device for notifying uses the radio communication to send reverse running warning information to the in-vehicle radio device of the vehicle that is about to enter the passage from the main road for automobile when the reverse running vehicle is detected by the processing means. The reverse vehicle warning system is configured to transmit and notify the vehicle of the presence of the reverse vehicle. In the reverse running vehicle warning system according to claim 2,
Using at least one notification roadside radio device installed near the entrance of a passage from the general road where the reverse running vehicle detection system is installed to the entrance ETC toll gate of the automatic toll collection system,
The roadside radio device for notification transmits reverse running warning information to an in-vehicle radio device of a vehicle that is about to enter the passage from a general road using the radio communication when a reverse running vehicle is detected by the processing means. The reverse vehicle warning system is configured to notify the vehicle of the presence of the reverse vehicle.