Secondary traffic accident prevention and control method in intelligent network connection mixed traffic flow environment

Abstract

The invention provides a secondary traffic accident prevention and control method in an intelligent network connection hybrid traffic flow environment. And after the accident occurs, the traffic management center evaluates the accident influence and the upstream traffic state based on the real-time traffic flow data acquired by the camera. On the one hand, RSU equipment within the range of 2000 meters on the upstream of the accident section is controlled to release safety information, and downstream accident conditions are informed to a network connection vehicle in advance through vehicle-vehicle communication forwarding. On the other hand, variable signal identifiers at different sections and RSU equipment are controlled to issue variable speed limit control instructions together, upstream coming vehicles are guided to decelerate ahead of an upstream free flow section so as to reduce the risk of secondary accidents, and the traffic capacity of urban expressways is improved. The control instruction is not forwarded through vehicle-to-vehicle communication. The control model is optimized based on a deep reinforcement learning algorithm. Two indexes of safety and efficiency are considered when a reward function is set, and a penalty factor is set to guide the model to learn a simpler and more reasonable control strategy. The model is optimized by adopting an actor reviewer framework.

Description

technical field [0001] The invention belongs to the technical fields of road traffic safety early warning, road traffic safety design, intelligent traffic management and control, and in particular relates to a secondary traffic accident prevention and control method in an intelligent network-connected mixed traffic flow environment. Background technique [0002] Expressway is one of the few types of highway facilities that can provide completely uninterrupted high-speed traffic flow. It plays a skeleton role in the regional transportation system, and the occurrence of accidents will form a fixed bottleneck, causing casualties and property losses, and will also generate additional emissions and energy. waste. In addition, the occurrence of the accident may also lead to secondary accidents, which will not only further aggravate the impact of existing accidents, but also greatly endanger the lives and health of emergency personnel. Therefore, the effective control of the proba...

AI Technical Summary

Problems solved by technology

[0002] Expressway is one of the few types of highway facilities that can provide completely uninterrupted high-speed traffic flow. It plays a skeleton role in the regional transportation system, and the occurrence of accidents will form a fixed bottleneck, causing casualties and property losses, and will also generate additional emissions and energy. waste

In addition, the occurrence of the accident may also lead to secondary accidents, which will not only further aggravate the impact of existing accidents, but also greatly endanger the lives and health of emergency personnel.

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