WO2017169265A1 - Wrong-direction traveling prevention system - Google Patents

Wrong-direction traveling prevention system Download PDF

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Publication number
WO2017169265A1
WO2017169265A1 PCT/JP2017/005870 JP2017005870W WO2017169265A1 WO 2017169265 A1 WO2017169265 A1 WO 2017169265A1 JP 2017005870 W JP2017005870 W JP 2017005870W WO 2017169265 A1 WO2017169265 A1 WO 2017169265A1
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WIPO (PCT)
Prior art keywords
vehicle
information
reverse running
reverse
roadside
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PCT/JP2017/005870
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French (fr)
Japanese (ja)
Inventor
朋明 阿部
文夫 小菅
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パナソニックＩｐマネジメント株式会社
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Publication of WO2017169265A1 publication Critical patent/WO2017169265A1/en

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages

Definitions

  • the present invention relates to a reverse running prevention system using road-to-vehicle communication.
  • Reverse running is very dangerous because it is likely to lead to serious accidents such as casualties. There is a risk that not only the party running backwards but also the forward running vehicle running correctly may get involved in the accident. In recent years, this problem has become more serious than before due to the complexity of road structures such as interchanges, travel restrictions at morning and evening hours, and the aging of drivers.
  • Patent Document 1 discloses a technology for detecting a reverse running of the host vehicle and calling attention using a car navigation system mounted on the vehicle.
  • vehicle reverse running prevention system disclosed in Patent Document 1 by comparing the detailed map information including the reverse running prohibited road information with the traveling position and traveling direction of the own vehicle acquired by the GPS (Global Positioning System) function, It is detected whether the host vehicle is running backward.
  • GPS Global Positioning System
  • Patent Document 2 an intelligent road traffic system that solves road traffic problems such as traffic accidents and traffic jams by transmitting and receiving wireless information communication between the roadside equipment installed on the road and the vehicle-mounted equipment mounted on the vehicle Counter-reverse measures using (ITS: Intelligent Transport Systems) have also been proposed (for example, Patent Document 2).
  • the vehicle trajectory information included in the uplink information provided from the vehicle-mounted device to the roadside device is used, and the vehicle on which the vehicle-mounted device is mounted runs backward on the roadside device side (including the management center).
  • a dangerous traveling information providing system that determines whether a vehicle is a forward traveling vehicle and provides dangerous traveling information when there is a reverse traveling vehicle is disclosed. Specifically, it is warned that the reverse running vehicle is running backward, and the forward running vehicle is notified that the reverse running vehicle is approaching.
  • the present invention provides a reverse running prevention system that can alert a reverse running vehicle easily and accurately using existing road infrastructure.
  • the reverse running prevention system reflecting one aspect of the present invention includes an on-vehicle device mounted on a vehicle and a roadside device capable of bidirectional communication with the on-vehicle device.
  • the roadside machine has a reproduction condition for reproducing the reverse running warning information and the reverse running warning information indicating that the vehicle is running backward with respect to the vehicle-mounted device of the vehicle passing through the communicable area of the roadside machine.
  • the vehicle-mounted device reproduces the reverse running warning information when the reproduction condition is satisfied.
  • FIG. 1 is a diagram showing a reverse running prevention system according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating a configuration of the vehicle-mounted device.
  • FIG. 3 is a diagram illustrating a configuration of the roadside machine.
  • FIG. 4 is a flowchart illustrating an example of the reverse running prevention process executed by the control unit 11 of the vehicle-mounted device.
  • FIG. 5 is a diagram illustrating an example of a situation in which reverse running warning information is reproduced.
  • FIG. 6 is a flowchart illustrating an example of the reverse running prevention process executed by the control unit 11 of the vehicle-mounted device.
  • FIG. 7 is a diagram illustrating an example of a situation in which reverse running warning information is reproduced.
  • FIG. 8 is a flowchart showing an example of the reverse running prevention process performed on the roadside machine side.
  • FIG. 9 is a diagram illustrating an example of a situation where reverse running attention information is reproduced.
  • Patent Document 1 uses map information of a car navigation system, there is a possibility that reverse running cannot be accurately detected, for example, when actual road conditions are not reflected in the map information.
  • Patent Document 2 since the technique disclosed in Patent Document 2 is processed on the roadside device side based on uplink information from the vehicle-mounted device, there is a risk that provision of dangerous traveling information to the reverse traveling vehicle may be delayed.
  • incorrect information is included in the uplink information due to problems such as map matching in the vehicle-mounted device, an error may occur in the reverse running determination at the management center.
  • FIG. 1 is a diagram showing a reverse running prevention system 1 according to an embodiment of the present invention.
  • the reverse running prevention system 1 includes an on-vehicle device 10, a roadside device 20, and a management center 30.
  • the in-vehicle device 10 is a wireless communication terminal capable of bidirectional communication with the roadside device 20.
  • a DSRC-compatible on-board device that performs bidirectional communication using a narrow-range communication technology (DSRC: Dedicated Short Range Communications) is applied as the on-vehicle device 10.
  • the vehicle-mounted device 10 transmits and receives information necessary for an ITS service (for example, payment of a toll road fee) to and from the roadside device 20.
  • ITS service for example, payment of a toll road fee
  • the onboard equipment 10 demonstrates as what does not have a car navigation function (what is called a speech-type onboard equipment), you may have a car navigation function.
  • the roadside machine 20 is installed on the road, and radiates radio waves from an antenna disposed on the roadside or on the road to form a communicable area A in the vicinity of the roadside machine 20.
  • a communicable area A is formed in the traveling direction of the vehicle. Regardless of whether or not the vehicle passing through the communicable area is a forward running vehicle, the downlink information provided by the roadside device 20 is received by the passing vehicle.
  • the management center 30 distributes information to the vehicle-mounted device 10 via the roadside device 20, and accumulates probe information and the like included in the uplink information provided from the vehicle-mounted device 10.
  • the accumulated probe information is used, for example, for analysis of usage routes. Further, for example, the accumulated probe information is used for a provided service, and is used for selecting an optimum route when the user moves and for managing a commercial vehicle (such as tracking a distribution route).
  • FIG. 2 is a diagram showing the configuration of the vehicle-mounted device 10.
  • the vehicle-mounted device 10 includes a control unit 11, a storage unit 12, a GPS unit (GPS: Global Positioning System) 13, a DSRC communication unit 14, an audio output unit 15, and the like.
  • GPS Global Positioning System
  • the storage unit 12 is an auxiliary storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or an SD (Secure Digital) card.
  • the storage unit 12 stores downlink information and the like provided from the roadside device 20.
  • the GPS unit 13 includes a GPS receiver that detects (positions) the position of the host vehicle based on a radio wave transmitted from an artificial satellite, a gyro sensor that detects the rotational angular velocity of the host vehicle, an acceleration sensor, a vehicle speed sensor, and the like. Based on the detection result of the GPS unit 13, the traveling direction and traveling position (latitude, longitude) of the vehicle can be detected.
  • the DSRC communication unit 14 has an antenna (not shown) and performs wireless communication with the roadside device 20 using the DSRC. For example, the DSRC communication unit 14 determines whether or not communication with the roadside device 20 is possible based on the detection status of an FCMC signal (FCMC: Frame Control Message Channel) transmitted from the roadside device 20. The DSRC communication unit 14 establishes a connection state with the roadside device 20 in the communicable range, transmits uplink information including a travel history to the roadside device 20, and is provided from the roadside device 20. Receive downlink information.
  • FCMC Frame Control Message Channel
  • the downlink information includes reverse running warning information indicating that the vehicle is running backward and a playback condition for playing back the backward running warning information.
  • the reverse running warning information is reproduced only when the reproduction condition is satisfied.
  • the audio output unit 15 is a so-called speaker, and outputs information reproduced by the information reproducing unit 114 as audio.
  • the control unit 11 has a CPU (Central Processing Unit) as an arithmetic / control device, a RAM (Random-Access Memory) and a ROM (Read-Only Memory) as a main storage device (all not shown).
  • the CPU reads a program corresponding to the processing content from the ROM or the storage unit 12 and develops it in the RAM, and controls each block in cooperation with the developed program.
  • the ROM stores in-vehicle device information and vehicle information in addition to a basic program called BIOS (Basic Input Output System).
  • BIOS Basic Input Output System
  • the in-vehicle device information includes ID information for each on-vehicle device, such as the manufacturer and model number of the on-vehicle device 10.
  • the vehicle information includes vehicle type information (large vehicle, medium vehicle, small vehicle, etc.) and is registered when the vehicle-mounted device 10 is mounted on the vehicle.
  • the control unit 11 functions as an uplink control unit 111, a downlink control unit 112, a reverse running prevention processing unit 113, and an information reproduction unit 114.
  • the uplink control unit 111 performs control when uplinking information to the roadside device 20.
  • the uplink control unit 111 uplinks uplink information including basic information and probe information to the roadside device 20 when the connection state with the roadside device 20 is established by the DSRC communication unit 14.
  • the basic information includes the on-board device information and vehicle information recorded in the ROM, as well as the identification of the roadside device that passed the previous time (for example, the previous beacon latitude / longitude information).
  • the probe information includes travel history information and behavior history information.
  • the travel history information includes time information, position information (latitude and longitude), speed information, and the like.
  • the behavior history information includes time information, position information (latitude and longitude), traveling direction information, longitudinal acceleration information, speed information, and the like.
  • the downlink control unit 112 performs control when downlink information is provided from the roadside device 20. For example, the downlink control unit 112 records the received downlink information in the storage unit 12.
  • the reverse running prevention processing unit 113 determines whether or not the reproduction condition included in the received downlink information is established, and reproduces the reverse running warning information when the reproduction condition is established.
  • the information reproducing unit 114 converts information (for example, reverse running warning information) included in the provided downlink information into reproducible data, and outputs the data from the audio output unit 15.
  • information for example, reverse running warning information
  • FIG. 3 is a diagram showing a configuration of the roadside machine 20.
  • the roadside unit 20 includes a control unit 21, a storage unit 22, a DSRC communication unit 23, an inter-road communication unit 24, an inter-center communication unit 25, and the like.
  • the storage unit 22 is an auxiliary storage device such as an HDD (Hard Disk Drive).
  • the storage unit 12 stores uplink information provided from the vehicle-mounted device 10.
  • the DSRC communication unit 23 has an antenna (not shown) and performs wireless communication with the vehicle-mounted device 10 using the DSRC.
  • the DSRC communication unit 23 always transmits downlink information including reverse running warning information and reproduction conditions to the communicable area A (so-called broadcast communication). Further, the DSRC communication unit 23 receives uplink information provided from the vehicle-mounted device 10 of the vehicle passing through the communicable area A.
  • the road-to-road communication unit 24 transmits / receives information to / from other roadside devices 20 via, for example, an Ethernet line.
  • the center communication unit 25 transmits / receives information to / from the management center 30 via, for example, an Internet line.
  • the inter-center communication unit 25 transmits, for example, uplink information provided from the vehicle-mounted device 10 to the management center 30.
  • the road-to-road communication may be performed via the management center 30.
  • the control unit 21 has a CPU (Central Processing Unit) as an arithmetic / control device and a RAM and a ROM as main storage devices (both not shown), like the control unit 11 of the vehicle-mounted device 10.
  • the control unit 21 functions as an uplink control unit 211, a downlink control unit 212, and a reverse running prevention processing unit 213.
  • the uplink control unit 211 performs control when uplink information is provided from the vehicle-mounted device 10.
  • the downlink control unit 212 performs control when providing downlink information to the vehicle-mounted device 10.
  • the reverse running prevention processing unit 213 determines whether or not the passing vehicle is a reverse running vehicle based on the running history included in the received uplink information. When the passing vehicle is a reverse running vehicle, the reverse running prevention processing unit 213 instructs the other roadside unit 20 to provide downlink information including reverse running warning information indicating that there is a reverse running vehicle. To do.
  • FIG. 4 is a flowchart showing an example of the reverse running prevention process executed by the control unit 11 (reverse running prevention processing unit 113) of the vehicle-mounted device 10. This process is realized by, for example, the CPU calling and executing a predetermined program stored in the ROM in association with receiving downlink information from the roadside device 20.
  • the information provision direction is used as a condition for reproducing the reverse running warning information.
  • “safe driving support information” defined as downlink information in DSRC can be used.
  • the safe driving support information is information that should be immediately reproduced when received.
  • the information provision direction flag in the safe driving support information is set to “1”, and the information provision direction is set to a direction (designated from among 16 directions) that can be regarded as a direction opposite to the specified traveling direction. .
  • step S101 the control unit 11 extracts the reverse running warning information and the information provision direction (reproduction condition) included in the downlink information.
  • step S102 the control unit 11 determines whether or not the information providing direction matches the traveling direction of the vehicle.
  • the traveling direction of the vehicle can be detected based on the detection result of the GPS unit 13.
  • the process proceeds to step S103. If the information providing direction does not match the traveling direction of the vehicle (“NO” in step S102), the process ends without reproducing the reverse traveling warning information.
  • step S103 the control unit 11 instructs to reproduce the reverse running warning information.
  • the information reproduction unit 114 controls the output of the reverse running warning information, and the audio output unit 15 outputs a sound indicating that the vehicle is running backward.
  • the output of reverse running warning information is continued until, for example, reverse running is resolved.
  • FIG. 6 is a flowchart showing another example of the reverse travel prevention process executed by the control unit 11 (reverse travel prevention processing unit 113) of the vehicle-mounted device 10. This process is realized by, for example, the CPU calling and executing a predetermined program stored in the ROM in association with receiving downlink information from the roadside device 20.
  • the information provision position (latitude, longitude) is used as the playback condition of the reverse running warning information.
  • “attention warning information” defined as downlink information in DSRC can be used.
  • the warning alert information is stored information in which the effective time and effective distance for providing information can be set. Specifically, the information provision position designation presence / absence flag in the alert / warning information is set to “1”, and the latitude / longitude of the information provision position is more upstream in the prescribed traveling direction than the roadside device 20 that provides the downlink information. Is set.
  • step S201 the control unit 11 extracts reverse running warning information and information providing position (reproduction condition) included in the downlink information.
  • step S202 the control unit 11 determines whether or not the information providing position matches the traveling position of the vehicle.
  • the traveling position of the vehicle can be detected based on the detection result of the GPS unit 13. If the information providing position matches the traveling position of the vehicle (“YES” in step S202), the process proceeds to step S204. If the information providing position does not match the traveling position of the vehicle (“NO” in step S202), the process proceeds to step S203.
  • step S203 the control unit 11 determines whether or not a certain time has elapsed since the downlink information was received. If the predetermined time has elapsed, the process ends without reproducing the reverse running warning information. If the predetermined time has not elapsed, the process proceeds to step S202.
  • step S204 the control unit 11 instructs to reproduce the reverse running warning information.
  • the information reproduction unit 114 controls the output of the reverse running warning information, and the audio output unit 15 outputs a sound indicating that the vehicle is running backward.
  • the output of reverse running warning information is continued until, for example, reverse running is resolved.
  • the vehicle after receiving the downlink information including the reverse running warning information, the vehicle passes through the information providing position, so that the reverse running occurs at the timing when the traveling position matches the information providing position. Warning information is played back.
  • a forward running vehicle after passing through the information providing position, downlink information including reverse running warning information is received, so the information providing position is not passed after reception and the reverse running warning information is not reproduced. In this way, it is possible to easily alert the reverse running vehicle by using the existing DSRC in-vehicle device and the DSRC roadside device, and changing the content of the downlink information (caution warning information).
  • FIG. 8 is a flowchart illustrating an example of the reverse running prevention process executed by the control unit 21 (reverse running prevention processing unit 213) of the roadside machine 20. This process is realized by, for example, the CPU calling and executing a predetermined program stored in the ROM in association with receiving uplink information from the vehicle-mounted device 10.
  • the control unit 21 extracts a travel history included in the uplink information.
  • the uplink information provided from the vehicle-mounted device 10 includes, as basic information, information on the roadside device 20 that has passed the previous time (previous beacon latitude / longitude information).
  • the previous beacon latitude / longitude information includes beacon information (latitude / longitude of the installation position of the roadside device 20) and beacon passage time. This beacon information can be used as a travel history. Note that travel history information included in the probe information may be used as the travel history.
  • step S302 the control unit 21 determines whether the vehicle that provided the uplink information is a reverse running vehicle based on the extracted running history. When the said vehicle is a reverse running vehicle, it transfers to the process of step S303. If the vehicle is not a reverse running vehicle, that is, a forward running vehicle, the process ends.
  • three roadside machines 20A, 20B, and 20C are installed adjacent to each other in order from the upstream side in the prescribed traveling direction, and roadside machine IDs “N ⁇ 1”, “N”, “N + 1” are respectively installed. ”Is assigned.
  • the previous beacon latitude / longitude information included in the uplink information provided to the roadside device 20B indicates “N ⁇ 1”, it is determined that the vehicle is a forward running vehicle.
  • the previous beacon latitude / longitude information included in the uplink information provided to the roadside device 20B indicates “N + 1”
  • the vehicle is determined to be a reverse running vehicle.
  • step S303 the control unit 21 performs reverse running caution information for the other roadside machine 20, specifically, the roadside machine 20 on the upstream side in the specified traveling direction (in FIG. 9, the roadside machine upstream of the roadside machine 20A). Instruct to provide.
  • the upstream roadside device 20 provides downlink information including reverse running warning information to the vehicle-mounted device 10 of the vehicle passing through the communicable area (step S304).
  • the reverse running attention information indicating that the reverse running vehicle is approaching from the front is reproduced (step S305).
  • the output of the reverse running attention information is continued until, for example, the reverse running is resolved or the reverse running vehicle passes.
  • the reverse running warning information is provided to the forward running vehicle, so the driver of the forward running vehicle knows the existence of the reverse running vehicle. Can be obtained. Accordingly, it is possible to cope with such as switching to low speed running (or stopping) in consideration of the fact that the reverse running vehicle is approaching, so that the possibility of avoiding a collision accident is increased.
  • the reverse running prevention system 1 includes the on-vehicle device 10 mounted on the vehicle and the roadside device 20 capable of bidirectional communication with the on-vehicle device 10.
  • the roadside machine 20 reproduces the reverse running warning information and the reverse running warning information indicating that the vehicle is running backward with respect to the vehicle-mounted device 10 of the vehicle passing through the communicable area A of the roadside machine 20.
  • Downlink information including reproduction conditions for example, information provision direction or information provision position
  • the vehicle-mounted device 10 reproduces the reverse running warning information when the reproduction condition is satisfied.
  • the reverse running prevention system 1 it is possible to call attention to the reverse running vehicle easily and accurately using the existing road infrastructure. Therefore, it is extremely useful for preventing a serious accident caused by reverse running.
  • the reverse running warning information and the reverse running warning information may be output as an image.
  • danger avoidance information in the case of multiple lanes, which lane the reverse running vehicle is traveling
  • reverse running warning information or reverse running warning information may be provided together with reverse running warning information or reverse running warning information.
  • the process for providing reverse running attention information may be performed by the management center 30 instead of the roadside machine 20.
  • the vehicle-mounted device, the road-to-vehicle communication system, and the uplink method according to the present invention are suitable for uplinking travel history information from the vehicle-mounted device to the roadside device.

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Abstract

The wrong-direction traveling prevention system has an on-board device installed in a vehicle and a roadside device capable of two-way communication with the on-board device. The roadside device provides the on-board device of a vehicle passing through the communication coverage area of the roadside device with wrong-direction traveling warning information indicating that the vehicle is traveling in the wrong direction and downlink information including a reproduction condition for reproducing the wrong-direction traveling warning information. The on-board device reproduces the wrong-way traveling warning information when the reproduction condition is met.

Description

逆走防止システムReverse run prevention system
　本発明は、路車間通信を利用した逆走防止システムに関する。 The present invention relates to a reverse running prevention system using road-to-vehicle communication.
　逆走は、死傷事故等の重大事故に繋がる可能性が高く、非常に危険である。逆走している当事者だけでなく、ときには正しく走行している順走車両も事故に巻き込んでしまう虞がある。近年では、インターチェンジ等の道路構造の複雑化、朝夕時間帯毎の走行規制や運転者の高齢化に伴い、この問題は、以前よりも深刻になっている。 Reverse running is very dangerous because it is likely to lead to serious accidents such as casualties. There is a risk that not only the party running backwards but also the forward running vehicle running correctly may get involved in the accident. In recent years, this problem has become more serious than before due to the complexity of road structures such as interchanges, travel restrictions at morning and evening hours, and the aging of drivers.
　従来、一般的な逆走対策として、誤って進入しやすい地点（例えば高速道路の出入り口付近や、サービスエリア又はパーキングエリアの出入り口付近）には、進入方向をわかりやすく案内する道路標識、看板、又は路面標示（以下「標識等」と称する）、逆走であることを警告する標識等が設置されている。これらの標識等を大型にしたり、高輝度にしたりする等、効果的に注意喚起を行う工夫もなされている。 Conventionally, as a general countermeasure against reverse running, a road sign, a signboard, or a sign that easily guides the approach direction at a point where it is easy to enter by mistake (for example, near the entrance of a highway or near the entrance of a service area or parking area) Road markings (hereinafter referred to as “signs etc.”) and signs that warn of reverse running are installed. Some ideas have been devised to effectively call attention such as increasing the size of these signs or increasing the brightness.
　また、特許文献１には、車両に搭載されるカーナビゲーションシステムを利用して、自車両の逆走を検知し、注意喚起を行う技術が開示されている。特許文献１に開示の車両逆走防止システムでは、逆走禁止道路情報を含む詳細地図情報と、ＧＰＳ（Global Positioning System）機能で取得される自車両の走行位置及び走行方向を比較することにより、自車両が逆走しているか否かが検出される。 Further, Patent Document 1 discloses a technology for detecting a reverse running of the host vehicle and calling attention using a car navigation system mounted on the vehicle. In the vehicle reverse running prevention system disclosed in Patent Document 1, by comparing the detailed map information including the reverse running prohibited road information with the traveling position and traveling direction of the own vehicle acquired by the GPS (Global Positioning System) function, It is detected whether the host vehicle is running backward.
　また、道路に設置される無線路側機と、車両に搭載される車載器の間で無線情報通信等の送受信を行うことにより、交通事故や渋滞などの道路交通問題の解決を図る高度道路交通システム（ＩＴＳ：Intelligent Transport Systems）を利用した逆走対策も提案されている（例えば特許文献２）。特許文献２には、車載器から路側機に提供されるアップリンク情報に含まれる車両の軌跡情報を利用し、路側機側（管理センターを含む）において、当該車載器を搭載する車両が逆走車両であるか順走車両であるかを判定し、逆走車両がある場合に危険走行情報を提供する危険走行情報提供システムが開示されている。具体的には、逆走車両に対しては逆走していることが警告され、順走車両に対しては逆走車両が接近していることが通知される。 In addition, an intelligent road traffic system that solves road traffic problems such as traffic accidents and traffic jams by transmitting and receiving wireless information communication between the roadside equipment installed on the road and the vehicle-mounted equipment mounted on the vehicle Counter-reverse measures using (ITS: Intelligent Transport Systems) have also been proposed (for example, Patent Document 2). In Patent Document 2, the vehicle trajectory information included in the uplink information provided from the vehicle-mounted device to the roadside device is used, and the vehicle on which the vehicle-mounted device is mounted runs backward on the roadside device side (including the management center). A dangerous traveling information providing system that determines whether a vehicle is a forward traveling vehicle and provides dangerous traveling information when there is a reverse traveling vehicle is disclosed. Specifically, it is warned that the reverse running vehicle is running backward, and the forward running vehicle is notified that the reverse running vehicle is approaching.
　特許文献１、２に開示の技術によれば、標識等が設置されている地点だけでなく、高速道路の本線においても、逆走車両に関する注意喚起を行うことができる。 According to the techniques disclosed in Patent Documents 1 and 2, it is possible to alert a reverse running vehicle not only at a point where a sign or the like is installed but also on the main road of the expressway.
特開２００７－１３９５３１号公報JP 2007-139531 A 特開２００９－２９４８１２号公報JP 2009-294812 A
　本発明は、既存の道路インフラを利用して、逆走車両に対して容易かつ的確に注意喚起を行うことができる逆走防止システムを提供する。 DETAILED DESCRIPTION OF THE INVENTION The present invention provides a reverse running prevention system that can alert a reverse running vehicle easily and accurately using existing road infrastructure.
　本発明の一側面を反映した逆走防止システムは、車両に搭載される車載器と、車載器と双方向通信可能な路側機と、を有する。路側機は、当該路側機の通信可能エリアを通過する車両の車載器に対して、当該車両が逆走していることを示す逆走警告情報及び逆走警告情報を再生するための再生条件を含むダウンリンク情報を提供する。車載器は、再生条件が成立した場合に逆走警告情報を再生する。 The reverse running prevention system reflecting one aspect of the present invention includes an on-vehicle device mounted on a vehicle and a roadside device capable of bidirectional communication with the on-vehicle device. The roadside machine has a reproduction condition for reproducing the reverse running warning information and the reverse running warning information indicating that the vehicle is running backward with respect to the vehicle-mounted device of the vehicle passing through the communicable area of the roadside machine. Provide downlink information including. The vehicle-mounted device reproduces the reverse running warning information when the reproduction condition is satisfied.
　本発明によれば、既存の道路インフラを利用して、逆走車両に対して容易かつ的確に注意喚起を行うことができる。 According to the present invention, it is possible to easily and accurately alert a reverse running vehicle using existing road infrastructure.
図１は、本発明の一実施の形態に係る逆走防止システムを示す図である。FIG. 1 is a diagram showing a reverse running prevention system according to an embodiment of the present invention. 図２は、車載器の構成を示す図である。FIG. 2 is a diagram illustrating a configuration of the vehicle-mounted device. 図３は、路側機の構成を示す図である。FIG. 3 is a diagram illustrating a configuration of the roadside machine. 図４は、車載器の制御部１１が実行する逆走防止処理の一例を示すフローチャートである。FIG. 4 is a flowchart illustrating an example of the reverse running prevention process executed by the control unit 11 of the vehicle-mounted device. 図５は、逆走警告情報が再生される状況の一例を示す図である。FIG. 5 is a diagram illustrating an example of a situation in which reverse running warning information is reproduced. 図６は、車載器の制御部１１が実行する逆走防止処理の一例を示すフローチャートである。FIG. 6 is a flowchart illustrating an example of the reverse running prevention process executed by the control unit 11 of the vehicle-mounted device. 図７は、逆走警告情報が再生される状況の一例を示す図である。FIG. 7 is a diagram illustrating an example of a situation in which reverse running warning information is reproduced. 図８は、路側機側で行われる逆走防止処理の一例を示すフローチャートである。FIG. 8 is a flowchart showing an example of the reverse running prevention process performed on the roadside machine side. 図９は、逆走注意情報が再生される状況の一例を示す図である。FIG. 9 is a diagram illustrating an example of a situation where reverse running attention information is reproduced.
　本発明の実施の形態の説明に先立ち、従来の技術における問題点を簡単に説明する。特許文献１に開示の技術は、カーナビゲーションシステムの地図情報を利用するため、実際の道路状況が地図情報に反映されていない場合など、正確に逆走を検知することができない虞がある。また、特許文献２に開示の技術は、車載器からのアップリンク情報を元に路側機側で処理が行われるので、逆走車両に対する危険走行情報の提供が遅れる虞がある。また、車載器におけるマップマッチング等の不具合により、アップリンク情報に誤った情報が含まれていた場合、管理センターでの逆走判定に誤りが生じることも考えられる。 Prior to the description of the embodiment of the present invention, the problems in the prior art will be briefly described. Since the technology disclosed in Patent Document 1 uses map information of a car navigation system, there is a possibility that reverse running cannot be accurately detected, for example, when actual road conditions are not reflected in the map information. Moreover, since the technique disclosed in Patent Document 2 is processed on the roadside device side based on uplink information from the vehicle-mounted device, there is a risk that provision of dangerous traveling information to the reverse traveling vehicle may be delayed. Moreover, when incorrect information is included in the uplink information due to problems such as map matching in the vehicle-mounted device, an error may occur in the reverse running determination at the management center.
　以下、本発明の実施の形態を、図面を参照して詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
　図１は、本発明の一実施の形態に係る逆走防止システム１を示す図である。図１に示すように、逆走防止システム１は、車載器１０、路側機２０、及び管理センター３０を有する。 FIG. 1 is a diagram showing a reverse running prevention system 1 according to an embodiment of the present invention. As shown in FIG. 1, the reverse running prevention system 1 includes an on-vehicle device 10, a roadside device 20, and a management center 30.
　車載器１０は、路側機２０との間で双方向通信可能な無線通信端末である。本実施の形態では、車載器１０として、狭域通信技術（ＤＳＲＣ：Dedicated Short Range Communications）を利用して双方向通信を行うＤＳＲＣ対応車載器を適用する。車載器１０は、路側機２０との間で、ＩＴＳサービス（例えば有料道路の料金の支払い）に必要な情報の送受信を行う。ここでは、車載器１０は、カーナビ機能を有さないもの（いわゆる発話型車載器）として説明するが、カーナビ機能を有していてもよい。 The in-vehicle device 10 is a wireless communication terminal capable of bidirectional communication with the roadside device 20. In the present embodiment, a DSRC-compatible on-board device that performs bidirectional communication using a narrow-range communication technology (DSRC: Dedicated Short Range Communications) is applied as the on-vehicle device 10. The vehicle-mounted device 10 transmits and receives information necessary for an ITS service (for example, payment of a toll road fee) to and from the roadside device 20. Here, although the onboard equipment 10 demonstrates as what does not have a car navigation function (what is called a speech-type onboard equipment), you may have a car navigation function.
　路側機２０は、道路に設置され、道路脇や道路上に配置されるアンテナから電波を放射し、路側機２０の近傍に通信可能エリアＡを形成する。ＤＳＲＣを利用する場合、アンテナから５ＧＨｚ帯の電波が放射され、車両の走行方向において数十ｍ～数百ｍの通信可能エリアＡが形成される。通信可能エリアを通過する車両が順走車両であるか否かに関わらず、路側機２０によって提供されるダウンリンク情報は、通過車両によって受信される。 The roadside machine 20 is installed on the road, and radiates radio waves from an antenna disposed on the roadside or on the road to form a communicable area A in the vicinity of the roadside machine 20. When DSRC is used, a 5 GHz band radio wave is emitted from the antenna, and a communicable area A of several tens to several hundreds of meters is formed in the traveling direction of the vehicle. Regardless of whether or not the vehicle passing through the communicable area is a forward running vehicle, the downlink information provided by the roadside device 20 is received by the passing vehicle.
　管理センター３０は、路側機２０を介して、車載器１０に情報を配信するとともに、車載器１０から提供されるアップリンク情報に含まれるプローブ情報等を蓄積する。蓄積されたプローブ情報は、例えば利用経路の分析などに用いられる。また例えば、蓄積されたプローブ情報は、提供されるサービスに利用され、利用者が移動する際の最適ルートの選択や、商用車の運行管理（物流ルートの追跡など）に活用される。 The management center 30 distributes information to the vehicle-mounted device 10 via the roadside device 20, and accumulates probe information and the like included in the uplink information provided from the vehicle-mounted device 10. The accumulated probe information is used, for example, for analysis of usage routes. Further, for example, the accumulated probe information is used for a provided service, and is used for selecting an optimum route when the user moves and for managing a commercial vehicle (such as tracking a distribution route).
　図２は、車載器１０の構成を示す図である。図２に示すように、車載器１０は、制御部１１、記憶部１２、ＧＰＳユニット（ＧＰＳ：Global Positioning System）１３、ＤＳＲＣ通信部１４、音声出力部１５等を有する。 FIG. 2 is a diagram showing the configuration of the vehicle-mounted device 10. As shown in FIG. 2, the vehicle-mounted device 10 includes a control unit 11, a storage unit 12, a GPS unit (GPS: Global Positioning System) 13, a DSRC communication unit 14, an audio output unit 15, and the like.
　記憶部１２は、例えばＨＤＤ（Hard Disk Drive）、ＳＳＤ（Solid State Drive）、又はＳＤ（Secure Digital）カード等の補助記憶装置である。記憶部１２は、路側機２０から提供されるダウンリンク情報等を記憶する。 The storage unit 12 is an auxiliary storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or an SD (Secure Digital) card. The storage unit 12 stores downlink information and the like provided from the roadside device 20.
　ＧＰＳユニット１３は、人工衛星からの送信電波に基づいて自車両の位置を検出（測位）するＧＰＳ受信機、自車両の回転角速度を検出するジャイロセンサー、加速度センサー及び車速センサー等を含む。ＧＰＳユニット１３の検出結果に基づいて、車両の走行方位及び走行位置（緯度、経度）を検出することができる。 The GPS unit 13 includes a GPS receiver that detects (positions) the position of the host vehicle based on a radio wave transmitted from an artificial satellite, a gyro sensor that detects the rotational angular velocity of the host vehicle, an acceleration sensor, a vehicle speed sensor, and the like. Based on the detection result of the GPS unit 13, the traveling direction and traveling position (latitude, longitude) of the vehicle can be detected.
　ＤＳＲＣ通信部１４は、アンテナ（図示略）を有し、ＤＳＲＣを利用して路側機２０との無線通信を行う。ＤＳＲＣ通信部１４は、例えば路側機２０から送信されるＦＣＭＣ信号（ＦＣＭＣ：Frame Control Message Channel）の検出状況に基づいて、路側機２０と通信可能であるか否かを判定する。そして、ＤＳＲＣ通信部１４は、通信可能範囲にある路側機２０との接続状態を確立し、当該路側機２０に対して走行履歴を含むアップリンク情報を送信するとともに、路側機２０から提供されるダウンリンク情報を受信する。 The DSRC communication unit 14 has an antenna (not shown) and performs wireless communication with the roadside device 20 using the DSRC. For example, the DSRC communication unit 14 determines whether or not communication with the roadside device 20 is possible based on the detection status of an FCMC signal (FCMC: Frame Control Message Channel) transmitted from the roadside device 20. The DSRC communication unit 14 establishes a connection state with the roadside device 20 in the communicable range, transmits uplink information including a travel history to the roadside device 20, and is provided from the roadside device 20. Receive downlink information.
　本実施の形態において、ダウンリンク情報は、車両が逆走していることを示す逆走警告情報及び逆走警告情報を再生するための再生条件を含む。すなわち、車載器１０では、再生条件が成立した場合にだけ、逆走警告情報が再生される。 In this embodiment, the downlink information includes reverse running warning information indicating that the vehicle is running backward and a playback condition for playing back the backward running warning information. In other words, in the vehicle-mounted device 10, the reverse running warning information is reproduced only when the reproduction condition is satisfied.
　音声出力部１５は、いわゆるスピーカーであり、情報再生部１１４によって再生された情報を音声として出力する。 The audio output unit 15 is a so-called speaker, and outputs information reproduced by the information reproducing unit 114 as audio.
　制御部１１は、演算／制御装置としてのＣＰＵ（Central Processing Unit）、主記憶装置としてのＲＡＭ（Random-Access Memory）及びＲＯＭ（Read-Only Memory）を有する（いずれも図示略）。ＣＰＵは、ＲＯＭ又は記憶部１２から処理内容に応じたプログラムを読み出してＲＡＭに展開し、展開したプログラムと協働して、各ブロックを制御する。ＲＯＭは、ＢＩＯＳ（Basic Input Output System）と呼ばれる基本プログラムの他、車載器情報及び車両情報を記憶する。車載器情報は、車載器１０の製造メーカー、型番等、車載器個別のＩＤ情報を含む。車両情報は、車種情報（大型車両、中型車両、小型車両等）を含み、車両に車載器１０を搭載する際に登録される。 The control unit 11 has a CPU (Central Processing Unit) as an arithmetic / control device, a RAM (Random-Access Memory) and a ROM (Read-Only Memory) as a main storage device (all not shown). The CPU reads a program corresponding to the processing content from the ROM or the storage unit 12 and develops it in the RAM, and controls each block in cooperation with the developed program. The ROM stores in-vehicle device information and vehicle information in addition to a basic program called BIOS (Basic Input Output System). The in-vehicle device information includes ID information for each on-vehicle device, such as the manufacturer and model number of the on-vehicle device 10. The vehicle information includes vehicle type information (large vehicle, medium vehicle, small vehicle, etc.) and is registered when the vehicle-mounted device 10 is mounted on the vehicle.
　制御部１１は、アップリンク制御部１１１、ダウンリンク制御部１１２、逆走防止処理部１１３、及び情報再生部１１４として機能する。 The control unit 11 functions as an uplink control unit 111, a downlink control unit 112, a reverse running prevention processing unit 113, and an information reproduction unit 114.
　アップリンク制御部１１１は、路側機２０に対して情報をアップリンクする際の制御を行う。アップリンク制御部１１１は、ＤＳＲＣ通信部１４によって路側機２０との接続状態が確立された場合に、基本情報及びプローブ情報を含むアップリンク情報を、路側機２０に対してアップリンクする。 The uplink control unit 111 performs control when uplinking information to the roadside device 20. The uplink control unit 111 uplinks uplink information including basic information and probe information to the roadside device 20 when the connection state with the roadside device 20 is established by the DSRC communication unit 14.
　基本情報は、ＲＯＭに記録されている車載器情報及び車両情報の他、前回通過した路側機の識別（例えば前回ビーコン緯度経度情報）を含む。プローブ情報は、走行履歴情報や挙動履歴情報を含む。走行履歴情報は、時刻情報、位置情報（緯度及び経度）、速度情報等を含む。挙動履歴情報は、時刻情報、位置情報（緯度及び経度）、進行方向情報、前後加速度情報、速度情報等を含む。 The basic information includes the on-board device information and vehicle information recorded in the ROM, as well as the identification of the roadside device that passed the previous time (for example, the previous beacon latitude / longitude information). The probe information includes travel history information and behavior history information. The travel history information includes time information, position information (latitude and longitude), speed information, and the like. The behavior history information includes time information, position information (latitude and longitude), traveling direction information, longitudinal acceleration information, speed information, and the like.
　ダウンリンク制御部１１２は、路側機２０からダウンリンク情報が提供される際の制御を行う。ダウンリンク制御部１１２は、例えば受信したダウンリンク情報を記憶部１２に記録する。 The downlink control unit 112 performs control when downlink information is provided from the roadside device 20. For example, the downlink control unit 112 records the received downlink information in the storage unit 12.
　逆走防止処理部１１３は、受信したダウンリンク情報に含まれる再生条件が成立したか否かを判定し、再生条件が成立した場合に、逆走警告情報を再生させる。 The reverse running prevention processing unit 113 determines whether or not the reproduction condition included in the received downlink information is established, and reproduces the reverse running warning information when the reproduction condition is established.
　情報再生部１１４は、提供されたダウンリンク情報に含まれる情報（例えば逆走警告情報）を再生可能なデータに変換し、音声出力部１５から出力させる。 The information reproducing unit 114 converts information (for example, reverse running warning information) included in the provided downlink information into reproducible data, and outputs the data from the audio output unit 15.
　図３は、路側機２０の構成を示す図である。図３に示すように、路側器２０は、制御部２１、記憶部２２、ＤＳＲＣ通信部２３、路路間通信部２４、及びセンター間通信部２５等を有する。 FIG. 3 is a diagram showing a configuration of the roadside machine 20. As shown in FIG. 3, the roadside unit 20 includes a control unit 21, a storage unit 22, a DSRC communication unit 23, an inter-road communication unit 24, an inter-center communication unit 25, and the like.
　記憶部２２は、例えばＨＤＤ（Hard Disk Drive）等の補助記憶装置である。記憶部１２は、車載器１０から提供されるアップリンク情報等を記憶する。 The storage unit 22 is an auxiliary storage device such as an HDD (Hard Disk Drive). The storage unit 12 stores uplink information provided from the vehicle-mounted device 10.
　ＤＳＲＣ通信部２３は、アンテナ（図示略）を有し、ＤＳＲＣを利用して車載器１０との無線通信を行う。ＤＳＲＣ通信部２３は、常時、通信可能エリアＡに、逆走警告情報及び再生条件を含むダウンリンク情報を送信する（いわゆる同報通信）。また、ＤＳＲＣ通信部２３は、通信可能エリアＡを通過する車両の車載器１０から提供されるアップリンク情報を受信する。 The DSRC communication unit 23 has an antenna (not shown) and performs wireless communication with the vehicle-mounted device 10 using the DSRC. The DSRC communication unit 23 always transmits downlink information including reverse running warning information and reproduction conditions to the communicable area A (so-called broadcast communication). Further, the DSRC communication unit 23 receives uplink information provided from the vehicle-mounted device 10 of the vehicle passing through the communicable area A.
　路路間通信部２４は、例えばイーサーネット回線を介して、他の路側機２０と情報の送受信を行う。センター間通信部２５は、例えばインターネット回線を介して、管理センター３０と情報の送受信を行う。センター間通信部２５は、例えば車載器１０から提供されたアップリンク情報を管理センター３０に送信する。なお、路路間通信は、管理センター３０を介して行われるようにしてもよい。 The road-to-road communication unit 24 transmits / receives information to / from other roadside devices 20 via, for example, an Ethernet line. The center communication unit 25 transmits / receives information to / from the management center 30 via, for example, an Internet line. The inter-center communication unit 25 transmits, for example, uplink information provided from the vehicle-mounted device 10 to the management center 30. The road-to-road communication may be performed via the management center 30.
　制御部２１は、車載器１０の制御部１１と同様に、演算／制御装置としてのＣＰＵ（Central Processing Unit）、主記憶装置としてのＲＡＭ及びＲＯＭを有する（いずれも図示略）。制御部２１は、アップリンク制御部２１１、ダウンリンク制御部２１２、及び逆走防止処理部２１３として機能する。 The control unit 21 has a CPU (Central Processing Unit) as an arithmetic / control device and a RAM and a ROM as main storage devices (both not shown), like the control unit 11 of the vehicle-mounted device 10. The control unit 21 functions as an uplink control unit 211, a downlink control unit 212, and a reverse running prevention processing unit 213.
　アップリンク制御部２１１は、車載器１０からアップリンク情報が提供される際の制御を行う。ダウンリンク制御部２１２は、車載器１０に対してダウンリンク情報を提供する際の制御を行う。 The uplink control unit 211 performs control when uplink information is provided from the vehicle-mounted device 10. The downlink control unit 212 performs control when providing downlink information to the vehicle-mounted device 10.
　逆走防止処理部２１３は、受信したアップリンク情報に含まれる走行履歴に基づいて、通過車両が逆走車両であるか否かを判定する。逆走防止処理部２１３は、通過車両が逆走車両であった場合、他の路側機２０に対して、逆走車両があることを示す逆走注意情報を含むダウンリンク情報を提供するよう指示する。 The reverse running prevention processing unit 213 determines whether or not the passing vehicle is a reverse running vehicle based on the running history included in the received uplink information. When the passing vehicle is a reverse running vehicle, the reverse running prevention processing unit 213 instructs the other roadside unit 20 to provide downlink information including reverse running warning information indicating that there is a reverse running vehicle. To do.
　図４は、車載器１０の制御部１１（逆走防止処理部１１３）が実行する逆走防止処理の一例を示すフローチャートである。この処理は、例えば路側機２０からのダウンリンク情報を受信することに伴い、ＣＰＵがＲＯＭに格納されている所定のプログラムを呼び出して実行することで実現される。 FIG. 4 is a flowchart showing an example of the reverse running prevention process executed by the control unit 11 (reverse running prevention processing unit 113) of the vehicle-mounted device 10. This process is realized by, for example, the CPU calling and executing a predetermined program stored in the ROM in association with receiving downlink information from the roadside device 20.
　ここでは、逆走警告情報の再生条件として、情報提供方位を利用する。この場合、ＤＳＲＣにおいてダウンリンク情報として規定されている「安全運転支援情報」を利用することができる。安全運転支援情報は、受信すると即時に再生されるべき情報である。具体的には、安全運転支援情報内の情報提供方位有無フラグが「１」に設定され、情報提供方位が規定走行方向とは逆方向とみなせる方位（１６方位の中から指定）に設定される。 Here, the information provision direction is used as a condition for reproducing the reverse running warning information. In this case, “safe driving support information” defined as downlink information in DSRC can be used. The safe driving support information is information that should be immediately reproduced when received. Specifically, the information provision direction flag in the safe driving support information is set to “1”, and the information provision direction is set to a direction (designated from among 16 directions) that can be regarded as a direction opposite to the specified traveling direction. .
　ステップＳ１０１において、制御部１１は、ダウンリンク情報に含まれる逆走警告情報及び情報提供方位（再生条件）を抽出する。 In step S101, the control unit 11 extracts the reverse running warning information and the information provision direction (reproduction condition) included in the downlink information.
　ステップＳ１０２において、制御部１１は、情報提供方位と車両の走行方位が一致するか否かを判定する。車両の走行方位は、ＧＰＳユニット１３の検出結果に基づいて検出することができる。情報提供方位と車両の走行方位が一致する場合（ステップＳ１０２で“ＹＥＳ”）、ステップＳ１０３の処理に移行する。情報提供方位と車両の走行方位が一致していない場合（ステップＳ１０２で“ＮＯ”）、逆走警告情報を再生することなく、処理は終了となる。 In step S102, the control unit 11 determines whether or not the information providing direction matches the traveling direction of the vehicle. The traveling direction of the vehicle can be detected based on the detection result of the GPS unit 13. When the information providing direction matches the traveling direction of the vehicle (“YES” in step S102), the process proceeds to step S103. If the information providing direction does not match the traveling direction of the vehicle (“NO” in step S102), the process ends without reproducing the reverse traveling warning information.
　ステップＳ１０３において、制御部１１は、逆走警告情報を再生するように指示する。この指示に従って情報再生部１１４が逆走警告情報の出力制御を行い、音声出力部１５から当該車両が逆走していることを示す音声が出力される。逆走警告情報の出力は、例えば逆走が解消されるまで継続される。 In step S103, the control unit 11 instructs to reproduce the reverse running warning information. In accordance with this instruction, the information reproduction unit 114 controls the output of the reverse running warning information, and the audio output unit 15 outputs a sound indicating that the vehicle is running backward. The output of reverse running warning information is continued until, for example, reverse running is resolved.
　すなわち、図５に示すように、逆走車両においては、走行方位と情報提供方位が一致するので、逆走警告情報が再生される。一方、順走車両においては、走行方位と情報提供方位は一致しないので、逆走警告情報は再生されない。このように、既存のＤＳＲＣ車載器及びＤＳＲＣ路側機を利用し、ダウンリンク情報の内容（安全運転支援情報）を変更するだけで、容易に逆走車両に対して注意喚起を行うことができる。 That is, as shown in FIG. 5, in the reverse running vehicle, the running direction and the information providing direction match, so the reverse running warning information is reproduced. On the other hand, in the forward running vehicle, the running direction and the information providing direction do not coincide with each other, so the reverse running warning information is not reproduced. In this way, it is possible to easily alert the reverse running vehicle by using the existing DSRC in-vehicle device and the DSRC roadside unit and changing the content of the downlink information (safe driving support information).
　図６は、車載器１０の制御部１１（逆走防止処理部１１３）が実行する逆走防止処理の他の一例を示すフローチャートである。この処理は、例えば路側機２０からのダウンリンク情報を受信することに伴い、ＣＰＵがＲＯＭに格納されている所定のプログラムを呼び出して実行することで実現される。 FIG. 6 is a flowchart showing another example of the reverse travel prevention process executed by the control unit 11 (reverse travel prevention processing unit 113) of the vehicle-mounted device 10. This process is realized by, for example, the CPU calling and executing a predetermined program stored in the ROM in association with receiving downlink information from the roadside device 20.
　ここでは、逆走警告情報の再生条件として、情報提供位置（緯度、経度）を利用する。この場合、ＤＳＲＣにおいてダウンリンク情報として規定されている「注意警戒情報」を利用することができる。注意警戒情報は、情報提供の有効時間及び有効距離を設定可能な蓄積情報である。具体的には、注意警戒情報内の情報提供位置指定有無フラグが「１」に設定され、情報提供位置の緯度経度が、当該ダウンリンク情報を提供する路側機２０よりも規定走行方向上流側に設定される。 Here, the information provision position (latitude, longitude) is used as the playback condition of the reverse running warning information. In this case, “attention warning information” defined as downlink information in DSRC can be used. The warning alert information is stored information in which the effective time and effective distance for providing information can be set. Specifically, the information provision position designation presence / absence flag in the alert / warning information is set to “1”, and the latitude / longitude of the information provision position is more upstream in the prescribed traveling direction than the roadside device 20 that provides the downlink information. Is set.
　ステップＳ２０１において、制御部１１は、ダウンリンク情報に含まれる逆走警告情報及び情報提供位置（再生条件）を抽出する。 In step S201, the control unit 11 extracts reverse running warning information and information providing position (reproduction condition) included in the downlink information.
　ステップＳ２０２において、制御部１１は、情報提供位置と車両の走行位置が一致するか否かを判定する。車両の走行位置は、ＧＰＳユニット１３の検出結果に基づいて検出することができる。情報提供位置と車両の走行位置が一致する場合（ステップＳ２０２で“ＹＥＳ”）、ステップＳ２０４の処理に移行する。情報提供位置と車両の走行位置が一致していない場合（ステップＳ２０２で“ＮＯ”）、ステップＳ２０３の処理に移行する。 In step S202, the control unit 11 determines whether or not the information providing position matches the traveling position of the vehicle. The traveling position of the vehicle can be detected based on the detection result of the GPS unit 13. If the information providing position matches the traveling position of the vehicle (“YES” in step S202), the process proceeds to step S204. If the information providing position does not match the traveling position of the vehicle (“NO” in step S202), the process proceeds to step S203.
　ステップＳ２０３において、制御部１１は、ダウンリンク情報を受信してから一定時間が経過したか否かを判定する。一定時間が経過した場合は、逆走警告情報を再生することなく、処理は終了となる。一定時間が経過していない場合は、ステップＳ２０２の処理に移行する。 In step S203, the control unit 11 determines whether or not a certain time has elapsed since the downlink information was received. If the predetermined time has elapsed, the process ends without reproducing the reverse running warning information. If the predetermined time has not elapsed, the process proceeds to step S202.
　ステップＳ２０４において、制御部１１は、逆走警告情報を再生するように指示する。この指示に従って情報再生部１１４が逆走警告情報の出力制御を行い、音声出力部１５から当該車両が逆走していることを示す音声が出力される。逆走警告情報の出力は、例えば逆走が解消されるまで継続される。 In step S204, the control unit 11 instructs to reproduce the reverse running warning information. In accordance with this instruction, the information reproduction unit 114 controls the output of the reverse running warning information, and the audio output unit 15 outputs a sound indicating that the vehicle is running backward. The output of reverse running warning information is continued until, for example, reverse running is resolved.
　すなわち、図７に示すように、逆走車両においては、逆走警告情報を含むダウンリンク情報を受信した後、情報提供位置を通過するので、走行位置と情報提供位置が一致するタイミングで逆走警告情報が再生される。一方、順走車両においては、情報提供位置を通過した後、逆走警告情報を含むダウンリンク情報を受信するので、受信後に情報提供位置を通過することはなく、逆走警告情報は再生されない。このように、既存のＤＳＲＣ車載器及びＤＳＲＣ路側機を利用し、ダウンリンク情報の内容（注意警戒情報）を変更するだけで、容易に逆走車両に対して注意喚起を行うことができる。 That is, as shown in FIG. 7, in the reverse running vehicle, after receiving the downlink information including the reverse running warning information, the vehicle passes through the information providing position, so that the reverse running occurs at the timing when the traveling position matches the information providing position. Warning information is played back. On the other hand, in a forward running vehicle, after passing through the information providing position, downlink information including reverse running warning information is received, so the information providing position is not passed after reception and the reverse running warning information is not reproduced. In this way, it is possible to easily alert the reverse running vehicle by using the existing DSRC in-vehicle device and the DSRC roadside device, and changing the content of the downlink information (caution warning information).
　図８は、路側機２０の制御部２１（逆走防止処理部２１３）が実行する逆走防止処理の一例を示すフローチャートである。この処理は、例えば車載器１０からのアップリンク情報を受信することに伴い、ＣＰＵがＲＯＭに格納されている所定のプログラムを呼び出して実行することで実現される。 FIG. 8 is a flowchart illustrating an example of the reverse running prevention process executed by the control unit 21 (reverse running prevention processing unit 213) of the roadside machine 20. This process is realized by, for example, the CPU calling and executing a predetermined program stored in the ROM in association with receiving uplink information from the vehicle-mounted device 10.
　ステップＳ３０１において、制御部２１は、アップリンク情報に含まれる走行履歴を抽出する。車載器１０から提供されるアップリンク情報には、基本情報として、前回通過した路側機２０の情報（前回ビーコン緯度経度情報）が含まれている。前回ビーコン緯度経度情報は、ビーコン情報（路側機２０の設置位置の緯度経度）及びビーコン通過時刻を含む。このビーコン情報を走行履歴として利用することができる。なお、走行履歴としてプローブ情報に含まれる走行履歴情報を利用してもよい。 In step S301, the control unit 21 extracts a travel history included in the uplink information. The uplink information provided from the vehicle-mounted device 10 includes, as basic information, information on the roadside device 20 that has passed the previous time (previous beacon latitude / longitude information). The previous beacon latitude / longitude information includes beacon information (latitude / longitude of the installation position of the roadside device 20) and beacon passage time. This beacon information can be used as a travel history. Note that travel history information included in the probe information may be used as the travel history.
　ステップＳ３０２において、制御部２１は、抽出した走行履歴に基づいて、アップリンク情報を提供した車両が逆走車両であるか否かを判定する。当該車両が逆走車両である場合、ステップＳ３０３の処理に移行する。当該車両が逆走車両でない、すなわち順走車両である場合、処理は終了となる。 In step S302, the control unit 21 determines whether the vehicle that provided the uplink information is a reverse running vehicle based on the extracted running history. When the said vehicle is a reverse running vehicle, it transfers to the process of step S303. If the vehicle is not a reverse running vehicle, that is, a forward running vehicle, the process ends.
　例えば、図９に示すように、規定走行方向上流側から順に、３つの路側機２０Ａ、２０Ｂ、２０Ｃが隣接して設置され、それぞれに路側機ＩＤ「Ｎ－１」、「Ｎ」、「Ｎ＋１」が割り当てられている場合を考える。路側機２０Ｂに提供されたアップリンク情報に含まれる前回ビーコン緯度経度情報が「Ｎ－１」を示す場合、当該車両は順走車両とであると判定される。一方、路側機２０Ｂに提供されたアップリンク情報に含まれる前回ビーコン緯度経度情報が「Ｎ＋１」を示す場合、当該車両は逆走車両であると判定される。 For example, as shown in FIG. 9, three roadside machines 20A, 20B, and 20C are installed adjacent to each other in order from the upstream side in the prescribed traveling direction, and roadside machine IDs “N−1”, “N”, “N + 1” are respectively installed. ”Is assigned. When the previous beacon latitude / longitude information included in the uplink information provided to the roadside device 20B indicates “N−1”, it is determined that the vehicle is a forward running vehicle. On the other hand, when the previous beacon latitude / longitude information included in the uplink information provided to the roadside device 20B indicates “N + 1”, the vehicle is determined to be a reverse running vehicle.
　ステップＳ３０３において、制御部２１は、他の路側機２０、具体的には規定走行方向上流側の路側機２０（図９では路側機２０Ａよりも上流の路側機）に対して、逆走注意情報を提供するように指示する。この指示を受けて、上流側の路側機２０は、通信可能エリアを通過する車両の車載器１０に対して、逆走注意情報を含むダウンリンク情報を提供する（ステップＳ３０４）。当該ダウンリンク情報を受信した車載器１０では、前方から逆走車両が接近していることを示す逆走注意情報が再生される（ステップＳ３０５）。逆走注意情報の出力は、例えば逆走が解消されるまで、又は逆走車両が通過するまで継続される。 In step S303, the control unit 21 performs reverse running caution information for the other roadside machine 20, specifically, the roadside machine 20 on the upstream side in the specified traveling direction (in FIG. 9, the roadside machine upstream of the roadside machine 20A). Instruct to provide. In response to this instruction, the upstream roadside device 20 provides downlink information including reverse running warning information to the vehicle-mounted device 10 of the vehicle passing through the communicable area (step S304). In the vehicle-mounted device 10 that has received the downlink information, the reverse running attention information indicating that the reverse running vehicle is approaching from the front is reproduced (step S305). The output of the reverse running attention information is continued until, for example, the reverse running is resolved or the reverse running vehicle passes.
　すなわち、図９に示すように、前方に逆走車両がある場合、順走車両に対して、逆走注意情報が提供されるので、順走車両の運転者は、逆走車両の存在を知得することができる。これにより、逆走車両が接近してくることを意識して、低速走行（又は停車）に切り替える等、対処することができるので、衝突事故を回避できる可能性が高まる。 That is, as shown in FIG. 9, when there is a reverse running vehicle ahead, the reverse running warning information is provided to the forward running vehicle, so the driver of the forward running vehicle knows the existence of the reverse running vehicle. Can be obtained. Accordingly, it is possible to cope with such as switching to low speed running (or stopping) in consideration of the fact that the reverse running vehicle is approaching, so that the possibility of avoiding a collision accident is increased.
　このように、本実施の形態に係る逆走防止システム１は、車両に搭載される車載器１０と、車載器１０と双方向通信可能な路側機２０と、を有する。路側機２０は、路側機２０の通信可能エリアＡを通過する車両の車載器１０に対して、当該車両が逆走していることを示す逆走警告情報及び逆走警告情報を再生するための再生条件（例えば、情報提供方位又は情報提供位置）を含むダウンリンク情報を提供する。車載器１０は、再生条件が成立した場合に逆走警告情報を再生する。 Thus, the reverse running prevention system 1 according to the present embodiment includes the on-vehicle device 10 mounted on the vehicle and the roadside device 20 capable of bidirectional communication with the on-vehicle device 10. The roadside machine 20 reproduces the reverse running warning information and the reverse running warning information indicating that the vehicle is running backward with respect to the vehicle-mounted device 10 of the vehicle passing through the communicable area A of the roadside machine 20. Downlink information including reproduction conditions (for example, information provision direction or information provision position) is provided. The vehicle-mounted device 10 reproduces the reverse running warning information when the reproduction condition is satisfied.
　逆走防止システム１によれば、既存の道路インフラを利用して、逆走車両に対して容易かつ的確に注意喚起を行うことができる。したがって、逆走に起因する重大事故を防止するのに極めて有用である。 According to the reverse running prevention system 1, it is possible to call attention to the reverse running vehicle easily and accurately using the existing road infrastructure. Therefore, it is extremely useful for preventing a serious accident caused by reverse running.
　以上、本発明者によってなされた発明を実施の形態に基づいて具体的に説明したが、本発明は上記実施の形態に限定されるものではなく、その要旨を逸脱しない範囲で変更可能である。 As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist thereof.
　例えば、車載器１０がカーナビ機能を有する場合は、逆走警告情報及び逆走注意情報を、画像として出力するようにしてもよい。また例えば、逆走警告情報又は逆走注意情報とともに、危険回避情報（複数車線の場合、逆走車両がどの車線を走行しているかなど）が提供されてもよい。また、逆走注意情報の提供を行うための処理（図８参照）は、路側機２０ではなく、管理センター３０で行われるようにしてもよい。 For example, when the vehicle-mounted device 10 has a car navigation function, the reverse running warning information and the reverse running warning information may be output as an image. Further, for example, danger avoidance information (in the case of multiple lanes, which lane the reverse running vehicle is traveling) may be provided together with reverse running warning information or reverse running warning information. Further, the process for providing reverse running attention information (see FIG. 8) may be performed by the management center 30 instead of the roadside machine 20.
　今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
　本発明に係る車載器、路車間通信システム、及びアップリンク方法は、車載器から路側機に対して走行履歴情報をアップリンクする場合に好適である。 The vehicle-mounted device, the road-to-vehicle communication system, and the uplink method according to the present invention are suitable for uplinking travel history information from the vehicle-mounted device to the roadside device.
　１　逆走防止システム
　１０　車載器
　１１　制御部
　１１１　アップリンク制御部
　１１２　ダウンリンク制御部
　１１３　逆走防止処理部
　１１４　情報再生部
　１２　記憶部
　１３　ＧＰＳユニット
　１４　ＤＳＲＣ通信部
　１５　音声出力部
　２０　路側機
　２１　制御部
　２１１　アップリンク制御部
　２１２　ダウンリンク制御部
　２１３　逆走防止処理部
　２２　記憶部
　２３　ＤＳＲＣ通信部
　２４　路路間通信部
　２５　センター間通信部
　３０　管理センター DESCRIPTION OF SYMBOLS 1 Reverse running prevention system 10 Onboard equipment 11 Control part 111 Uplink control part 112 Downlink control part 113 Reverse running prevention process part 114 Information reproduction part 12 Storage part 13 GPS unit 14 DSRC communication part 15 Voice output part 20 Roadside machine 21 Control Unit 211 uplink control unit 212 downlink control unit 213 reverse run prevention processing unit 22 storage unit 23 DSRC communication unit 24 roadside communication unit 25 center communication unit 30 management center

Claims (7)

  1. 　車両に搭載される車載器と、前記車載器と双方向通信可能な路側機と、を備え、
    　前記路側機は、当該路側機の通信可能エリアを通過する車両の車載器に対して、当該車両が逆走していることを示す逆走警告情報及び前記逆走警告情報を再生するための再生条件を含むダウンリンク情報を提供し、
    　前記車載器は、前記再生条件が成立した場合に前記逆走警告情報を再生する、逆走防止システム。     A vehicle-mounted device mounted on a vehicle, and a roadside machine capable of bidirectional communication with the vehicle-mounted device,
    The roadside unit reproduces the reverse running warning information indicating that the vehicle is running backward and the reverse running warning information with respect to the vehicle-mounted device of the vehicle passing through the communicable area of the roadside unit. Provide downlink information including conditions,
    The on-vehicle device is a reverse running prevention system that reproduces the reverse running warning information when the reproduction condition is satisfied.
  2. 　前記再生条件は、情報提供方位であり、
    　前記車載器は、自車両の走行方位と前記情報提供方位が一致した場合に、前記逆走警告情報を再生する、請求項１に記載の逆走防止システム。     The reproduction condition is an information providing direction,
    2. The reverse travel prevention system according to claim 1, wherein the in-vehicle device reproduces the reverse travel warning information when the travel direction of the host vehicle coincides with the information provision direction.
  3. 　前記逆走警告情報及び前記情報提供方位は、ＤＳＲＣ（Dedicated Short Range Communications）で規定される安全運転支援情報として提供される、請求項２に記載の逆走防止システム。 The reverse running prevention system according to claim 2, wherein the reverse running warning information and the information provision direction are provided as safe driving support information defined by DSRC (Dedicated Short Range Communications).
  4. 　前記再生条件は、情報提供位置であり、
    　前記車載器は、自車両の走行位置と前記情報提供位置が一致した場合に、前記逆走警告情報を再生する、請求項１に記載の逆走防止システム。     The reproduction condition is an information providing position,
    2. The reverse travel prevention system according to claim 1, wherein the in-vehicle device reproduces the reverse travel warning information when a travel position of the host vehicle coincides with the information providing position.
  5. 　前記逆走警告情報及び前記情報提供位置は、ＤＳＲＣで規定される注意警戒情報として提供される、請求項４に記載の逆走防止システム。 The reverse running prevention system according to claim 4, wherein the reverse running warning information and the information providing position are provided as caution warning information defined by DSRC.
  6. 　前記車載器は、前記路側機に対して、走行履歴を含むアップリンク情報を提供し、
    　前記路側機は、前記走行履歴に基づいて、逆走車両の有無を検出し、
    　逆走車両が検出された場合に、当該逆走車両を検出した路側機の規定走行方向上流側の路側機は、逆走車両があることを示す逆走注意情報を提供する、請求項１から５のいずれか一項に記載の逆走防止システム。     The on-vehicle device provides uplink information including a travel history to the roadside device,
    The roadside machine detects the presence or absence of a reverse running vehicle based on the running history,
    When a reverse running vehicle is detected, the roadside device upstream of the specified traveling direction of the roadside device that has detected the reverse running vehicle provides reverse running attention information indicating that there is a reverse running vehicle. The reverse running prevention system according to any one of 5.
  7. 　前記走行履歴は、ＤＳＲＣで基本情報として規定される前回ビーコン緯度経度情報である、請求項６に記載の逆走防止システム。 The reverse travel prevention system according to claim 6, wherein the travel history is previous beacon latitude / longitude information defined as basic information by DSRC.
PCT/JP2017/005870 2016-03-28 2017-02-17 Wrong-direction traveling prevention system WO2017169265A1 (en)

Applications Claiming Priority (2)

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