Prevention and control method of secondary traffic accidents under intelligent network mixed traffic flow environment

Abstract

The invention proposes a secondary traffic accident prevention and control method in an intelligent network-connected mixed traffic flow environment. After the accident, the traffic management center evaluates the impact of the accident and the upstream traffic status based on the real-time traffic flow data obtained by the camera. On the one hand, it controls the RSU equipment within 2,000 meters upstream of the accident section to release safety information, and forwards it through vehicle-to-vehicle communication to inform the connected vehicles of the downstream accident situation in advance. On the other hand, the variable signal signs at different sections are controlled to issue variable speed limit control instructions together with the RSU equipment to guide the upstream vehicles to decelerate earlier than the upstream free flow section to reduce the risk of secondary accidents and improve the capacity of urban expressways. . Control commands are not forwarded through vehicle-to-vehicle communication. The invention optimizes the control model based on the deep reinforcement learning algorithm. When setting the reward function, two indicators of safety and efficiency are taken into account, and a penalty factor is set to guide the model to learn a more concise and reasonable control strategy. The model is optimized using the actor-critic 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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