Emergency vehicle priority signal control method based on phase difference progressive and circulatory coordination

Abstract

The invention provides an emergency vehicle priority signal control method based on phase difference progressive and circulatory coordination, and particularly provides a signal control strategy based on phase difference progressive and circulatory coordination. The signal control strategy is combined with an emergency vehicle priority signal control strategy for emergency vehicle priority signal control, and an emergency vehicle priority signal timing conversion control strategy and a dynamic phase difference calculation method are provided. In a city road system composed of intersections, three emergency vehicle signal control strategies are adopted for micro simulation experiments, results show that emergency vehicles can safely pass the intersections without stopping by adopting the emergency vehicle priority signal control strategy for control after phase dynamic circulatory and progressive fine adjustment of each intersection, and effect of causing minimum influence on non-emergency vehicles is realized.

Description

technical field [0001] The invention belongs to the field of intelligent transportation, relates to the control of road signal lamps, in particular to a method for controlling priority signals of emergency vehicles based on phase difference progressive cycle coordination. Background technique [0002] The driving of emergency vehicles on the road will have a great impact on the normal operation of nearby vehicles, which will induce traffic jams or traffic accidents. The priority signal of emergency vehicles can effectively reduce the rescue response time of emergency vehicles, but it may interrupt the original signal coordination, coupled with the lack of information sharing between signal controllers, it will cause unnecessary delays to general traffic. [0003] How to reduce the response time of emergency vehicles and minimize the impact on general traffic has become a research hotspot in recent years. Qin X L proposed two signal timing switching strategies to make emerge...

AI Technical Summary

Problems solved by technology

The disadvantage of this mode is that, under the condition of fixed phase and phase sequence, adjusting the original signal timing parameters only by shortening the red light time or prolonging the green light time through the algorithm will interrupt the original signal coordination; and in this mode, emergency After the vehicle passes through the intersection, it needs a signal recovery process with complex algorithms, large amount of mathematical calculations, and low practicability

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