Adaptive signal method capable of avoiding deadlock of intersection and device

Abstract

The invention provides an adaptive signal method capable of avoiding deadlock of an intersection and a device, which relate to the field of intelligent traffic. The method includes acquiring the number of vehicles at the intersection and the vehicle speed of an exit section in a current traffic direction; and switching the phase of an intersection signal into the phase of a temporary signal when the number of the vehicles at the intersection is larger than a threshold value and the vehicle speed of the exit section is lower than a threshold value. The phase of the temporary signal includes prohibiting vehicles in the current traffic direction from running into the intersection and prohibiting traffic in a vehicle flow direction conflicting with the current traffic direction. Whether the phase of the temporary signal needs to be switched in or not is determined by means of judging the number of the vehicles at the intersection and the vehicle speed of the exit section corresponding to the traffic signal, the traffic in the vehicle flow direction conflicting with the current traffic direction is prohibited within the phase of the temporary signal, accumulation of the vehicles at the intersection is avoided, deadlock of the intersection is stopped, traffic efficiency of the intersection is improved, urban traffic jam is relieved, and traffic accident rate is reduced.

Description

technical field [0001] The present application relates to the field of intelligent transportation, in particular to an adaptive signal method and device for avoiding deadlock at intersections. Background technique [0002] Due to the interruption of traffic flow at urban road level intersections controlled by signal lights, the traffic capacity is lower than that of road sections, which is the main bottleneck of urban traffic. Establishing an effective traffic signal control strategy is an important means to ensure the traffic safety of the intersection and to fully utilize the traffic efficiency of the intersection. With the continuous improvement of traffic detection technology and the in-depth understanding of traffic flow operation rules, single intersection signal control has experienced the development process from timing control, induction control to adaptive control, and adapted to the development of traffic signal from passive control to active control. Direction r...

AI Technical Summary

Problems solved by technology

[0005] The existing intersection signal control method generally adopts the timing signal adjustment method. During the peak time of traffic flow, as long as the signal light is green, the vehicles will enter the intersection without restriction, resulting in the existing method not being able to effectively avoid the deadlock state.

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