Method and device for controlling traffic signals of intersections

Abstract

The invention provides a method and device for controlling traffic signals of intersections. The method for controlling traffic signals of intersections comprises the following steps: (1) detecting whether the road between an upstream intersection and a downstream intersection is congested or not by a congestion detector, wherein the congestion detector is arranged between the upstream intersection and the downstream intersection; and (2) if the road is congested, prolonging the time of the green light of the downstream intersection or shortening the time of the green light of the upstream intersection. When the road is congested, by prolonging the time of the green light of the downstream intersection, vehicles on the congested road can pass through the downstream intersection and run away from the congested road because of longer green light time, so that the congested road can be unblocked quickly; or by shortening the time of the green light of the upstream intersection, the number of the vehicles running on the congested road is reduced, so that the congested road can also be unblocked quickly, thereby realizing the purpose of reducing the occurrence of the phenomenon that the traffic capacity of the road network in a large range is lowered because a single intersection is congested.

Description

technical field [0001] The invention relates to the technical field of traffic control, in particular to a traffic signal control method and device at an intersection. Background technique [0002] At present, with the improvement of people's living standards, cars are widely used in people's daily life. Simultaneously, the quantity of automobile is also increasing day by day, and traffic pressure is increasing, especially the traffic pressure at road intersection place is bigger. [0003] Large-scale traffic congestion in the urban road network is often formed by the diffusion of individual intersections. The queued vehicles at the blocked intersection trace back to the upstream intersection, resulting in the continuous expansion of the traffic congestion area, which eventually leads to the queuing "domino" in the urban road network. "The occurrence of the phenomenon. Therefore, in the prior art, it is easy to appear the phenomenon that the traffic capacity of a large-sca...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a traffic signal control method and device at an intersection, which is used to solve the defect in the prior art that the traffic capacity of a large-scale road network is reduced due to congestion at a single intersection, and to realize the reduction of large-scale road traffic caused by congestion at a single intersection. Occurrence of reduced network traffic capacity

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