Research And Implementation Of Intersection Collision Avoidance Early Warning Based On Vehicle-road Cooperation

With the rapid progress and sustainable development of China’s social economy,transportation is increasingly developed,and the number of cars is increasing rapidly.While making people’s production and life more convenient,followed by more traffic safety problems.Among them,the hidden danger of the road intersection is particularly prominent,which has been a common problem concerned by various regions and countries.However,due to the traffic flow in multiple directions and complex traffic conditions,the safety accident problem of road intersection has not been effectively solved.Vehicle-road collaboration is a popular direction in the development of intelligent transportation at present.Real-time communication between vehicle-vehicle and vehicleroad based on vehicle-road collaboration technology can greatly improve traffic efficiency and reduce traffic accidents.Statistics show that traffic accidents caused by driver’s improper operation can reach more than 70%.If the driver can receive a safety warning within 2 seconds before the traffic conflict and take preventive measures in advance,most traffic safety accidents can be effectively avoided.Based on the theoretical system framework of vehicle-road collaboration technology,this paper studies the possible conflict forms at road intersections and the related theories of collision avoidance early warning systems,and proposes a vehicle early warning method and system at intersections.The main research work is as follows:(1)Research on theories related to vehicle-road coordination system,collision avoidance warning system design and intersection conflict control.It focuses on the analysis of the overall composition of the vehicle-road coordination system and the core technologies applied by each subsystem,and outlines the common conflict forms,classification methods and main conflict resolution models at intersections.(2)Conduct demand analysis on the collision avoidance early warning and control system under vehicle-road cooperation.Based on a vehicle early warning method proposed in this paper,establish the relevant system framework and complete the overall design of the system.At the hardware level,the device models needed to realize the early warning scheme in this paper are selected.At the same time,the connection mode and transmission process between each hardware part are designed.At the software level,a reliable,stable,highly malleable and low-coupling early warning information management system was designed and developed.At the same time,a mobile Android system APP was developed for obtaining the position information of beacon vehicles and displaying the navigation route and early warning content.Designed the map display and route navigation interface,combined with the early warning information management system to jointly realize the early warning program.(3)Complete the release of early warning management information system and the installation of the synergy App on the experimental vehicle,and carry out the real vehicle test on the road of China Automotive Research Institute Park.The results showed that it meets the demands.and the corresponding early warning prompt can be timely fed back to the driver at the intersection according to different traffic information,effectively reducing the probability of vehicle collision and man vehicle conflict,which verifies the feasibility of the warning scheme and system described in this paper.