Vehicle-road cooperative dynamic lane control system and method for preventing expressway secondary accident

Abstract

The invention discloses a vehicle-road cooperation dynamic lane control system and method for preventing expressway secondary accidents, after an accident occurs, a traffic management center controls RSU equipment within a range of 2000 meters upstream of an accident section to issue safety information based on real-time traffic flow data on one hand, forwards the safety information through vehicle-vehicle communication, and informs a network connection vehicle of a downstream accident condition in advance; on the other hand, variable signal identifiers at different sections are controlled to issue dynamic lane control instructions, and an upstream coming vehicle is guided to reasonably change lanes in advance of an upstream free flow section, so that the influence of downstream accidents is reduced, and the secondary accident risk caused by the downstream accidents is reduced. According to the method, the phenomenon that the upstream coming vehicles are influenced by accidents and start to queue and then do not know downstream accident information to change lanes blindly and frequently is relieved fundamentally, the risk of secondary accidents such as rear-end collision caused by the phenomenon is reduced, meanwhile, the passing efficiency is improved, and richer accident information is provided for networked vehicles based on the vehicle-mounted ad hoc network technology.

Description

technical field [0001] The invention relates to a vehicle-road cooperative dynamic lane control system and method for preventing secondary accidents on expressways, and belongs to the technical fields of road traffic safety early warning, road traffic safety design, and intelligent traffic management and control. 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 probability and severity ...

AI Technical Summary

Problems solved by technology

However, farther away from the accident section, due to the limitation of sight distance, the vehicles queuing behind cannot accurately judge the exact information of the accident ahead, and there are frequent blind lane changing behaviors.

The superposition of the above two types of lane-changing behaviors will seriously reduce the utilization rate of lanes and further reduce the traffic capacity. At the same time, frequent lane-changing will also seriously interfere with the normal passage of vehicles in other lanes, increasing the risk of secondary accidents such as rear-end collisions.

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