Implementing technology for road traffic light adaptive control

Abstract

According to a traffic light timed and adaptive control ideal of the invention, vehicles are observed before a stop line, and whether there is no vehicle or there are sparsely-distributed vehicles on a lane is judged according to the distance interval between vehicles or an equivalent time interval. A traffic light adaptive control system scheme is formed by adding a plurality of detection sensors on the basis of a traditional traffic signal controller control scheme. Three levels of adaptive control mechanisms are put forward. The first level aims to shorten the time for waiting at the intersection, namely, a currently opened lane can be shut off when that there is no vehicle or there are sparsely-distributed vehicles on the lane is detected. The second level aims to make the traffic light timed control parameter adjusted automatically in accordance with the traffic conditions and closer to the optimal. The third level requests that the detection sensors can provide accurate traffic flow information to provide a basis for regional or metropolitan traffic intelligent management. The invention further put forwards a scheme for communication between the detection sensors and a traffic signal controller.

Description

technical field [0001] This patent relates to the field of road traffic control, and proposes a technology for realizing adaptive control of traffic lights. technical background [0002] The scientificity of timing control of traffic lights directly affects the traffic efficiency of intersections. The current timing control scheme is based on the statistical data of traffic flow at intersections collected manually in advance, and overall it has a good rationality. However, the current timing control scheme is fixed, and there is no function of adaptively adjusting the timing scheme when the traffic condition at the intersection changes. As far as a single intersection is concerned, if the opening time of the green light in a certain direction is always short, it will cause a backlog of vehicles to occupy the road; if the opening time is too long, it will cause empty intersections and reduce traffic efficiency. [0003] The adaptive adjustment of traffic light timing is a p...

AI Technical Summary

Problems solved by technology

Due to the high cost of counting the number of oncoming vehicles in the direction of the lane or it is currently difficult to implement, other methods with similar effects have to be considered

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