CN104167101B - LED optical communication system arranged between traffic light with information issue function and mobile vehicle body - Google Patents

Abstract

The invention discloses an LED optical communication system between a traffic light with an information publishing function and a mobile car body, including a regional traffic information management and dispatch center, a traffic signal light system, a mobile vehicle system, and a temporary information management and reporting traffic information system for traffic police on duty; The beneficial effect is that the transmission and networking mode of traffic information in the form of QR two-dimensional codes displayed by LED traffic lights and vehicle lights is adopted, and the network structure is simple. LED traffic lights and LED car lights can perform wireless optical communication with vehicle-mounted mobile bodies while indicating information, and release traffic information with the help of QR two-dimensional codes with large storage capacity to alleviate road congestion and improve vehicle active prevention to reduce traffic accidents.

Description

Information release function LED optical communication system between traffic lights and mobile car body

technical field

The invention belongs to the technical field of LED optical communication, and relates to an LED optical communication system between a traffic light with an information release function and a mobile vehicle body.

Background technique

With the continuous increase of city scale, the urban traffic network is becoming more and more complex. The road design of international developed countries adopts the separation design of people, vehicles and non-motorized vehicles, while our country still adopts mixed traffic design. Even in the era of motorized traffic Today, the mixed traffic design is still adopted, and all problems are handed over to the traffic signal intersection, so traffic congestion will inevitably occur. At present, traffic congestion on urban roads is a world-class problem. The reason is that it is difficult to establish a mathematical model of road traffic and difficult to make control decisions. LED traffic lights with information release function, LED car lights, and visible light communication between LED car lights and LED car lights are a flexible solution for terminal mobile communication technology in intelligent transportation systems, and improve communication between mobile vehicles. Active safety prevention to reduce traffic accidents. The dual-purpose purpose of LED traffic light, LED car light signal indication and communication is achieved.

At present, the methods of intelligent transportation system to solve the congestion problem are as follows:

1. Through the establishment of subways and elevated roads, the traffic flow can be separated to drive and stay on different planes.

2. Measures to limit the number of lines and numbers can gain buffer time for big cities to solve the problem of traffic congestion.

3. By rationally designing the signal order of traffic intersections, the lost time at intersections can be reduced and traffic capacity can be improved.

4. Green wave technology.

5. LED screens are used next to the road to display the smoothness and congestion of nearby main roads.

Above prior art all has its shortcoming:

1. Through the establishment of subways and elevated roads, the traffic flow can be separated to travel and stay on different planes, so that the traffic congestion has been alleviated a lot, but with the expansion of the city, the congestion problem is still very serious. 2. Measures to limit the number of lines and numbers can buy a buffer time for big cities to solve the problem of traffic congestion, but in the long run and fundamentally to solve the problem of congestion in big cities, it is necessary to start with optimizing the urban spatial layout and adjusting resource allocation. 3. Signal timing at traffic intersections has its inherent scientific laws and calculation methods. As long as the flow and demand data are accurate, there will be no problem with signal timing. Left turns are prohibited, there are many U-turns, and the flow changes randomly. It is difficult to establish a mathematical model of road traffic, difficult to make control decisions, and difficult to grasp the exact law of flow changes. Traffic congestion on urban roads is a world-class problem. 4. The green wave belt technology can only solve some road problems, and it is only considered from a partial rather than a systematic perspective. 5. LED screens are used next to the road to display information about the smoothness and congestion of nearby main roads. The traffic signal capacity analysis is a complex problem, which involves many aspects.

Aiming at the limitations of the above methods, the present invention builds optical communication between LED traffic lights and mobile car bodies with information release function and LED lights and LED The optical communication between lights is expected to increase the traffic rate of the road, relieve congestion, improve active safety prevention among moving vehicles, and reduce traffic accidents.

Contents of the invention

The purpose of the present invention is to provide an LED optical communication system between traffic lights and mobile car bodies with information release function, which solves the problem that the existing traffic management system uses traditional transmission lines or radio signal transmission methods to form a network, complex structure, and various types of equipment.

The technical solution adopted by the present invention includes a regional traffic information management and dispatching center, a traffic signal light system, a mobile vehicle system, and a temporary information management and reporting traffic information system for traffic police on duty; wherein:

Regional traffic information management and dispatching center: used to receive the temporary traffic information sent by the traffic police temporary information management and reporting traffic information system and the local real-time traffic conditions and service information collected by the camera and the ground sensing coil, and send them in the form of QR two-dimensional code Send traffic information to the traffic light system;

Traffic signal light system: receive the QR matrix two-dimensional code information, display the QR matrix two-dimensional code information through hundreds of small LED tubes arranged in the LED traffic signal light, and transmit the local real-time traffic information collected by the camera and the ground induction coil to the Regional traffic information management and dispatch center;

Mobile vehicle system: receive the QR matrix two-dimensional code information displayed by the LED traffic lights, decode the QR two-dimensional code information, display the content or broadcast the content to the driver, and encode the driving information of the vehicle to form a QR two-dimensional code for the LED vehicle The lights are displayed to the rear car, and the rear car receives the QR code LED light information of the front car through the video module to ensure the safety protection of the two cars and reduce traffic accidents;

Temporary information management and reporting system for traffic police on duty: Traffic police release temporary road condition information.

Further, the traffic signal light system includes a traffic signal light unit control module, the traffic signal light unit control module is respectively connected to the LED traffic signal light control card and the receiving module through the circuit, the LED traffic signal light control card is connected to the LED traffic light through the circuit, the camera and the ground sensing coil sensor The sensing module is installed on the road;

Further, the mobile vehicle-mounted system includes a vehicle-mounted control module, and the vehicle-mounted control module is respectively connected to the video receiving module module, the map image display or voice broadcast, the vehicle driving information release and the LED lamp control card through the circuit, and the LED lamp control card circuit Connect LED car lights; the video receiving module module receives the video information of the traffic signal lights, and transmits the information to the vehicle control module, and the vehicle control module processes the received information and expresses it for the driver through map image display or voice broadcast For reference, the LED car light control card drives the LED car light to send the driving information of the car to subsequent vehicles.

Further, the LED traffic light is a circular LED traffic light, the middle LED light tube displays the traffic information represented by the matrix QR two-dimensional code, and the surrounding LED light tubes send time information and area location, so that the information issued by the LED traffic light On the time label and location label, the red, green and yellow traffic lights are arranged in a circle with thousands of two-color LED tubes, and multiple LED tubes in the largest square inscribed in the circle are used to display the QR code information of M*M size , the vehicle light is composed of a plurality of single-color LED lamp tubes, and the plurality of LED tubes display matrix QR two-dimensional code information of K*K specification.

Further, the LED traffic lights display traffic information with QR two-dimensional codes, including the realization of individual vehicle command functions, and the information is divided into two categories: control command information, sending instruction information to different types of vehicles; release of service information. The specific information that needs to be encoded includes: special vehicle traffic instructions; special traffic instructions for ordinary vehicles at a certain time; the best non-congested route proposal for the destination; individual command acceleration and deceleration instructions for vehicles; traffic restrictions and road traffic instructions for trucks and buses; Publish service information such as parking lots, gas stations, and 4S shop maintenance.

The beneficial effect of the present invention is that the LED traffic lights and vehicle lights display the QR two-dimensional code information transmission networking mode, and the network structure is simple. LED traffic lights and LED car lights can perform wireless optical communication with vehicle-mounted mobile bodies while indicating information. With the help of QR two-dimensional codes with large storage capacity, traffic information can be released to alleviate road congestion and improve vehicle active prevention to reduce traffic accidents.

Description of drawings

FIG. 1 is a schematic structural diagram of an intelligent transportation system based on LED optical communication according to the present invention.

Fig. 2 is a hardware connection diagram of the traffic signal light system of the present invention.

Fig. 3 is a hardware connection diagram of the LED control card in the LED light information sending module of the present invention;

Fig. 4 is a connection diagram of LED light information receiving/sending and information processing hardware equipment in the vehicle-mounted system of the present invention;

Fig. 5 is a hardware connection diagram of the vehicle lamp QR two-dimensional code information sending module of the present invention;

Fig. 6 is a sequence diagram of optical information transmission/reception between the LED traffic signal lamp of the present invention and the vehicle-mounted video receiving module;

In Figure 1, 1. Traffic signal light unit control module, 2. LED traffic signal light control card, 3. LED traffic signal light, 4. Receiving module, 5. Video receiving module module, 6. Vehicle control module, 7. Map image display Or voice broadcast, 8. Release of vehicle driving information, 9. LED light control card, 10. LED light, 11. Camera, 12. Temporary information management and reporting of traffic police on duty to traffic information terminal, 13. Ground sense coil

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the traffic signal system includes a traffic signal unit control module 1, the traffic signal unit control module 1 is respectively connected to the LED traffic signal control card 2 and the receiving module 4 through the circuit, the receiving module 4 will receive information from the regional traffic information management and scheduling The QR matrix two-dimensional code traffic information in the center is sent to the traffic signal unit control module 1, and the control module 1 (industrial computer) generates the current red, green and yellow signal light cycle according to the priority, and sends the QR two-dimensional code information to the LED through the serial port Traffic signal light control card, LED traffic signal light control card drives red, green and yellow traffic signal lights to display M*M QR two-dimensional code traffic information. In this way, traffic information and command instructions are displayed in the form of a QR two-dimensional code while the red, green, and yellow signal lights at the intersection indicate. The camera 11 and the ground sensing coil 13 sensing module are installed on the road. The camera 11 and the ground sensing coil 13 sensing module transmit the information to the industrial computer in the traffic signal light system, and store it on the large-capacity hard disk of the industrial computer. The pictures and videos on the hard disk And the data is regularly transmitted to the regional traffic information management and dispatching center through the network switch and optical transceiver in FTP mode.

As shown in Figure 2, the receiving module 4 in the traffic signal system sends the traffic information from the regional traffic management and dispatching center to the traffic signal unit control module 1, and the traffic signal unit control module 1 sends the information to the LED traffic signal control card 2, The LED traffic signal lamp control card 2 drives the red, green and yellow LED traffic signal lamp 3 to send traffic information to the moving vehicle. The mobile vehicle system uses the video receiving module module 5 installed on the front of the car to receive information from the traffic lights and transmits it to the vehicle control module 6. The control module decodes the information and expresses it to the driver through map image display or voice broadcast 7, and The vehicle driving information is transmitted to the vehicle control module 6 through the vehicle driving information release 8, and the vehicle control module 6 performs QR two-dimensional coding on the information and transmits it to the LED vehicle light control card 9, and the LED vehicle light control card 9 drives the LED vehicle light 10 Send the driving information of this car to the follow-up vehicles. The receiving module 4 in the traffic signal light system is composed of an optical transceiver with video transmission, RS485 data transmission, Ethernet data transmission, RS485 to 232 interface and other related interface circuits. The control module 1 of the traffic signal light unit adopts an industrial computer, and the notebook computer can intervene in the work flow of the industrial computer, and forcefully reset all the signal light phase periods on site when necessary. LED traffic signal light control card 2 adopts 32-bit microprocessor with ARM Cortex-M4 core as the core control module, and externally expanded memory SDRAM and NORFlash. The LED traffic signal light adopts red and green dual-color LED lights, and when both are on, it displays yellow, which meets the color requirements of red, green and yellow traffic lights. The LED traffic signal light control card 2 receives the signal from the industrial computer, and drives the LED screen of M*M specification after processing. The structure of the LED traffic signal light control card 2 is shown in FIG. 3 .

Temporary information management and reporting of traffic police on duty The traffic information terminal 12 is used for hand-held and portable traffic police. As a mobile handheld device, the traffic information processed at any time is sent to the traffic signal system and the regional traffic information management and dispatching center. Regional traffic information management and dispatching center Responsible for the comprehensive processing of the entire system information, release scheduling information. The present invention adopts optical communication between the traffic signal light system and the mobile vehicle-mounted system and LED optical communication between vehicles, and displays relevant traffic information on the LED traffic signal light in the form of a matrix QR two-dimensional code through a special LED traffic signal light. The network transmission medium between the traffic information management and dispatch center and the traffic signal light system is the dedicated optical fiber network of the Ministry of Public Security. Temporary information management and reporting of traffic police on duty Traffic information terminal 12 and special vehicles (ambulances, fire trucks, ordinary vehicles with special needs, etc.) transmit information to the regional traffic management and dispatch center, which will process the information and send Relevant information is QR two-dimensional coded and transmitted to various traffic signal light systems through bus broadcasting. The upper computer of the regional traffic management and dispatching center first broadcasts the address information, and all the lower computers of the traffic light system (ie industrial computer) listen to the broadcast and stop receiving. After receiving the address information, the lower computers compare the addresses. If the addresses are the same, Then the data packet is received, and the other lower computers return from the interrupt because the addresses do not match.

As shown in Figure 4, the LED light information receiving/sending and information processing system in the mobile vehicle system includes a vehicle control module 6, which is connected to a video receiving module module 5, map image display or voice broadcast 7, and vehicle driving information release 8 through a circuit. And the LED car light control card 9, the LED car light control card 9 circuit is connected to the LED car light 10; wherein the video receiving module module 5 receives the video information of the traffic signal lights, and transmits the information to the vehicle control module 6, the vehicle control module 6 After the received information is processed, it is expressed by map image display or voice broadcast 7 for the driver's reference, and the LED lamp control card 9 drives the LED lamp 10 to send the driving information of the vehicle to the follow-up vehicle. Figure 5 is a QR two-dimensional code information sending system for car lights. The timing sequence of traffic signal system information transmission and video acquisition and reception of mobile vehicle system information in the entire system is shown in Figure 6, and the timing sequence of LED light information transmission between vehicles is also shown in Figure 6.

The regional traffic information management and dispatch center collects road information and reports through the camera 11 and the ground sensing coil 13 sensing module, and reports the traffic information resources of special vehicles (ambulances, fire trucks, ordinary vehicles with special needs, etc.) and floating vehicles. A big data system for regional traffic information has been established. According to the information association and correlation between data in the big data system, data mining technology can be used to accurately estimate the traffic flow, smoothness, and ideal speed of traffic roads. Through the traffic signal light system, it is released to the vehicle-mounted mobile terminal, and the vehicle-mounted mobile terminal selects the best route and ideal speed according to the current road conditions, and the road traffic in the entire region forms a virtuous circle. The regional network forms the traffic control and dispatch center of the whole city and province, and the traffic control and dispatch center of the whole city and province. The Internet forms the traffic control and dispatch center of the whole country, realizing the "unified command and responsibility level by level" , Coordinated linkage intelligent transportation system.

The traffic signal light system receives the QR two-dimensional code information from the regional traffic information management and dispatching center, and the industrial computer in the traffic signal light system sends the QR two-dimensional code to the LED traffic light control card 2 through the UART serial port, and the LED traffic light control card 2 drives the red , green, and yellow traffic lights display M*M format QR two-dimensional code traffic information. The mobile vehicle terminal uses a video module with variable focus and adjustable exposure time to receive and decode QR code information from traffic lights. After decoding, the map image display or voice broadcast is performed, and the driver (unmanned vehicle control system) can choose the corresponding service and driving route according to the information. Car lights (Japanese car lights have become the European driving standard) are used to transmit information such as braking, acceleration, and safe distance between cars. The LED taillights of the front car emit K*K QR code information, and the rear car uses zoom and exposure. The time-adjustable video module receives the QR code from the vehicle in front, and controls the vehicle to accelerate, decelerate or stop after decoding to improve the active safety prevention of the vehicle and avoid collisions. The mobile vehicle system adopts time division multiplexing TDM method to collect two-way QR two-dimensional code video information of traffic lights and front and rear lights.

The innovative points of the technology of the present invention:

1. Utilizing the large amount of information stored in two-dimensional codes, the traffic information to be sent is QR coded and displayed through traffic lights. The mobile vehicle terminal collects QR two-dimensional code images through the video module, decodes and restores the traffic information. The red, yellow and green signal lights alternately light up to direct road traffic while sending QR code traffic information, so that people still see the traditional red, yellow and green traffic signal lights.

2. The matrix QR code information is displayed in the middle of the circular LED traffic lights and LED car lights, and the LED light tubes around the traffic lights send time information and area locations, so that the released traffic information carries time tags and location tags. The traffic signal lights are arranged in a circle with thousands of two-color LED tubes, and multiple LED tubes in the largest square inscribed with the circle are used to display the QR two-dimensional code information of M*M size. LED car lights are composed of multiple single-color LED tubes, and multiple LED tubes display matrix QR two-dimensional code information of K*K specification.

3. When LED traffic lights send QR codes, low-speed communication and multiple 0 codes are sent, it is considered that the unprocessed data communication transmission will cause the light intensity of the LED signal lights to be unstable and make people feel that the brightness is not balanced, resulting in the same as people are used to. The problem of large color deviation of red, green and yellow lights, so it is necessary to solve the stability of the light intensity emitted by the LED signal light, that is, the stability of the emitted light power of the LED signal light source. This system uses the first half of a cycle to transmit the original information code, and the second half of the cycle to transmit the inverse code of the original information code, so that the optical power is 50% and remains constant. Considering the visual dwell characteristics of the human eye, the original information code and its inverse code are alternately transmitted in a very short time to keep the optical power constant. The sending end sends the original information code at time t1, the logo mark of the QR two-dimensional code is set to 1; the inverse code of the original information code is transmitted at time t2 (t2=t1), the logo mark of the QR two-dimensional code is set to 0, and the video mode of the receiving end is set to 0. Group sampling period T, continuously collect n1 frames of pictures in the time period of t1+t2, set the brightness threshold of the logo mark, and for the collected n1 frames of pictures, according to the set logo logo image brightness threshold, when it is greater than the threshold, it is a valid image, Otherwise an invalid image. Decode the captured valid QR code image.

Specific implementation examples: as shown in Figure 6, the original information code (logo sign 1 of QR two-dimensional code) shows 10ms, and the inverse code (QR two-dimensional code inverse code logo sign 0) of the original information code shows 10ms; Clock Clk1: period 20ms square wave (logo signal period); QR two-dimensional code picture transmission: send the original information code on the rising edge, and send the inverse code of the original information code on the falling edge; video acquisition Clk2: square wave with a period of 5ms, sampling time 3ms (ie exposure time 3ms, or screen refresh time), 2ms data processing. Sampling 2-3 frames of images in 10ms, first set the brightness threshold of the logo mark, for the collected images P1, P2, P3..., it is valid when the image brightness is greater than the threshold according to the logo mark (m*m LED lamps realize the logo mark) image, otherwise invalid. By judging the brightness of the logo mark, the synchronization of the signals of the sending and receiving parties is realized.

The synchronous information of the sender and receiver is extracted from the collected signal. The timing is shown in Figure 6. 2 to 3 frames of complete QR code images of the original information code are collected within 10 ms. The exposure time is adjustable and the zoom video module is used to automatically adjust the exposure time according to the intensity of the light. Dynamic shooting, every second Continuously shoot more than 300 frames of QR two-dimensional code traffic information pictures from traffic lights, and obtain 100 to 150 frames of original information code two-dimensional code images through brightness threshold judgment. Decode the obtained 100-150 frames of original two-dimensional code images.

4. Use LED lights between cars (Japanese car lights become the European driving standard) to transmit information such as braking, acceleration, and safe distance between cars. The LED taillights of the front car send QR code information, and the rear car can zoom and the exposure time can be The video adjustment module receives the QR code from the vehicle in front, and after decoding, controls the vehicle to accelerate, decelerate or stop to improve the active safety prevention of the vehicle and avoid collisions.

5. In the wireless optical communication between vehicles, when the front and rear lights send QR codes, low-speed communication or non-communication and multiple 0 codes are sent, considering that the unprocessed data communication transmission will cause the light of the LED signal light Strong instability makes people feel that the brightness is flickering, and the method of technical key point 3 is used to keep the optical power constant to solve the problem of the stability of the emitted light intensity of the vehicle LED taillights.

6. For the ultimate goal of individual command of vehicles in road traffic, LED traffic lights adopt the time-division multiplexing technology of time slice rotation when sending information to multiple types of vehicles.

The present invention has the following advantages:

1. This plan starts from the hardware platform provided by the existing traffic system, combined with the characteristics of the large capacity of QR code storage and release information, traffic lights release traffic information in the form of QR code, from the perspective of direct participants who directly affect the traffic system Consider trying to alleviate traffic congestion and improve vehicle proactive safety precautions.

2. Using LED traffic lights and LED car lights to perform wireless optical communication while indicating traffic signals is expected to achieve large-scale control and navigation of traffic, improve the traffic efficiency of the existing road network, and coordinate strategically.

3. Drivers can obtain the most timely traffic, road or location information during driving, choose the best driving route, avoid collisions, and ensure smooth traffic. In addition, the identity recognition of the vehicle can also be realized, which is convenient for management. It provides an effective and low-cost solution for the terminal communication access of the intelligent transportation system. The present invention combines the characteristics of current smart phone terminals to scan two-dimensional codes to read information, and has a large application space in public places such as shopping malls, stations, airports, and roads for information release and transmission using LED optical communication.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications made to the above embodiments according to the technical essence of the present invention, equivalent changes and modifications, all belong to this invention. within the scope of the technical solution of the invention.

Claims (5)

1. between a kind of information issuing function traffic lights and moving body led optic communication system it is characterised in that: include region hand over Logical information management and control centre, traffic signal lamp system, vehicle-carried mobile system and traffic police's temporary information on duty manage and report Traffic information system；

Regional traffic information management and control centre: for receiving traffic police's temporary information management on duty and reporting traffic information system The interim traffic information sending, and the local real-time traffic condition that collects of camera and ground induction coil and information on services, and Transport information is sent to by traffic signal lamp system with qr Quick Response Code form；

Traffic signal lamp system: receive qr matrix two-dimensional code information, the thousands of led by arrangement in led traffic lights are little Fluorescent tube shows qr matrix two-dimensional code information, and the local Real-time Traffic Information that camera and ground induction coil are collected passes to area Domain traffic information management and control centre；

Vehicle-carried mobile system: receive the qr matrix two-dimensional code information that traffic signal lamp system is shown by led traffic lights, right Qr matrix two-dimensional code information after being decoded shows content or voice broadcast is to driver, and this car driving information is encoded formed With led car light, qr Quick Response Code shows that, to rear car, rear car receives the qr Quick Response Code led car light letter of front truck by video module Breath is so that it is guaranteed that the security protection of two cars；Reduce traffic accident；

Traffic police's temporary information management on duty and reporting system: traffic police issues interim traffic information.

2. between information issuing function traffic lights according to claim 1 and moving body led optic communication system, its feature It is: described traffic signal lamp system includes traffic lights unit control module (1), traffic lights unit control module (1) led Traffic signal control card (2) and receiver module (4), led Traffic signal control card (2) are connected respectively by circuit Led traffic lights (3) are connected by circuit, camera (11) and ground induction coil (13) sensing module are arranged on road.

3. between information issuing function traffic lights according to claim 1 and moving body led optic communication system, its feature It is: described vehicle-carried mobile system includes vehicle-mounted control module (6), vehicle-mounted control module (6) connects video by circuit respectively Receiving module module (5), map image shows or voice broadcast (7), this car driving information issue (8) and led car light control card (9), led car light control card (9) circuit connects led car light (10)；Wherein video reception module (5) receives traffic lights The video information of bright light, communicates information to vehicle-mounted control module (6), and vehicle-mounted control module (6) is by the information receiving Shown by map image after reason or voice broadcast (7) is expressed and supplied reference driver, led car light control card (9) drives led car Lamp (10) sends this car driving information to subsequent vehicle.

4. between information issuing function traffic lights according to claim 1 and moving body led optic communication system, its feature It is: described led traffic lights (3) are circular LED lamp, and centre is qr matrix two-dimensional code information, when surrounding LED lamp pipe sends Between information and regional location so that time tag and location label on the information band issued of led traffic lights (3), red greenish-yellow Traffic lights adopt thousands of double-colored LED lamp pipe arrangements circular, wherein meet multiple led in largest square using in circle Pipe shows the qr matrix two-dimensional code information of m*m specification, and described car light adopts multiple monochrome LED lamp pipes to constitute, and multiple led pipes show The qr matrix two-dimensional code information of k*k specification.

5. between information issuing function traffic lights according to claim 1 and moving body led optic communication system, its feature It is: described led traffic lights (3) show transport information with qr Quick Response Code, including realizing individual vehicle command function, information Divide two big class: control command information, command information is sent to variety classes vehicle；The issue of information on services；Specifically need to encode Information have: special vehicle pass-through command；The special pass-through command in common vehicle moment；The optimal not congestion route of destination Scheme proposalses；Realizing vehicle commands individually acceleration and deceleration to instruct；Lorry, bus are restricted driving and passing road instruction；Parking lot, oiling Stand, maintenance service information in 4s shop is issued.