An Adaptive Control Method for Traffic Signals at Intersections Considering Supply-side Constraints

Abstract

The invention belongs to the field of intelligent transport study and relates to an adaptive intersection signal control method considering supply side constraint. The problem that consideration on intersection exit ramp transportation supplies is absent in the existing signal control system and study is solved. The method comprises the following steps: 1, detecting and processing intersection traffic information, and acquiring traffic demands of an intersection entrance ramp and traffic supplies of the exit ramp; 2, establishing a time-varying relationship of intersection traffic supplies, and constructing an intersection supply-demand matrix; 3, establishing an intersection signal timing dial optimization model for quintuple descriptions on problem description, initial state, target state, action set and knowledge rule based on intelligent planning; and 4, searching the target state by adopting a decision-making tree method, and generating a corresponding timing plan. Compared with the prior art, the method disclosed by the invention has the advantages that active control of intersections is realized, the intersection downstream exit ramp queue overflow can be avoided, and intersection 'deadlock' is avoided.

Description

technical field [0001] The invention relates to a traffic signal control method at an intersection in the field of intelligent traffic research, more precisely, the invention relates to a traffic signal adaptive control method at an intersection considering supply-side constraints. Background technique [0002] At present, all parts of the country are facing serious traffic congestion problems. As the basic unit of urban traffic control, signalized intersections are of great significance to solving traffic congestion problems, such as the application of signal control systems such as TRANSYT, SCATS, SCOOT, OPAC, and RHODES. , effectively improving the traffic efficiency of the road network. However, these systems are all based on the assumption that the queuing capacity of the intersection exit lane is infinite. This assumption is valid when the intersection is not saturated. When the intersection is saturated or oversaturated, the assumption will fail, so often appear The ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an adaptive control method for traffic signals at intersections that considers constraints on the supply side in order to overcome the existing signal control system and the lack of consideration of the traffic supply of exit roads at intersections in the research

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