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Real-time traffic conflict early warning method based on high accuracy positioning and vehicle-vehicle cooperation

A real-time traffic, high-precision technology, applied in the field of traffic safety, can solve problems such as inability to realize real-time vehicle information transmission and processing, failure to consider the microscopic process of turning driving behavior, and inability to adapt to high-frequency dynamic traffic environment changes

Active Publication Date: 2017-06-20
上海同视交通科技有限公司
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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

Method used

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  • Real-time traffic conflict early warning method based on high accuracy positioning and vehicle-vehicle cooperation
  • Real-time traffic conflict early warning method based on high accuracy positioning and vehicle-vehicle cooperation
  • Real-time traffic conflict early warning method based on high accuracy positioning and vehicle-vehicle cooperation

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Embodiment

[0161] Such as figure 1 The flow chart of the concrete example of the shown real-time traffic conflict algorithm:

[0162] S11 Quantify the state change process of each stage of turning according to the characteristics of the turning process of the vehicle at the intersection. During the first stage, the driver keeps changing the angle of the steering wheel, and the angular velocity of the vehicle increases continuously. Under the action of the centripetal force, the lateral velocity gradually increases, while the longitudinal velocity decreases with the increase of the braking force. The initial process of entering the turning state from the straight-going state. The second stage is the middle process of turning. The driver no longer changes the steering wheel angle and braking force. The driving state of this stage can be regarded as a circular motion with constant angular velocity, increased lateral velocity, and constant longitudinal velocity. The third stage is the fina...

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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 [0001] 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 [0002] 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 c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/16
Inventor 王俊骅李易张兰芳
Owner 上海同视交通科技有限公司
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