A real-time traffic conflict early warning method based on high-precision positioning and vehicle-vehicle coordination

Abstract

The invention relates to a real-time traffic conflict algorithm based on high accuracy positioning and vehicle-vehicle cooperation, and is used for real-time conflict judgment for straight movement of main road vehicles and turning of branch vehicles at the T-shaped intersection lacking signal lamps. The method comprises the following steps that 1) the state change process of each stage of turning is quantified according to the vehicle turning process characteristics of the intersection; 2) the real-time position and the movement state data of the vehicle near the intersection are acquired by combining the high accuracy positioning and vehicle-vehicle cooperation technology so as to predict the duration of three stages of the turning vehicles; 3) different levels of conflict areas are defined by combining the vehicle-vehicle cooperation technology; and 4) the real-time traffic conflict algorithm is established according to the principle of road right distribution, the duration of the three stages of turning and the conflict area prediction result. Compared with the methods in the prior art, the real-time traffic conflict algorithm has the advantages of being highly accurate in positioning and real-time and accurate, considering the micro-process of turning and effectively preventing the vehicle conflict at the intersection.

Description

technical field The invention relates to the technical field of traffic safety, in particular to a real-time traffic conflict algorithm based on high-precision positioning and vehicle-vehicle coordination. Background technique Road traffic accidents are one of the most serious "public nuisances" in the world today. With the large-scale popularization of vehicles, conflicts and collisions between vehicles are becoming more and more serious, and most of them are concentrated in road level intersections with complex traffic information environment or sudden changes in the environment, especially T-shaped intersections without signals. In the vicinity of such intersections, because the drivers on the way cannot obtain the information of the traffic, environment and other transverse vehicles at the intersection ahead, they cannot take safety measures such as deceleration and avoidance in time, which is one of the main causes of accidents. , and frequent traffic conflicts are its...

AI Technical Summary

Problems solved by technology

Previous conflict models did not consider the microscopic process of turning driving behavior, could not realize the transmission and processing of real-time vehicle information, and could not adapt to the high-frequency dynamic traffic environment changes at real road intersections

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