Evaluation Method of Signal Timing Scheme at Intersection

Abstract

The invention discloses an intersection signal timing plan evaluating method, and belongs to the technical field of intelligent traffic control. The intersection signal timing plan evaluating method comprises the following steps: acquiring evaluating index measured values before and after optimization of a signal timing plan, wherein evaluating indexes comprise traffic headway, queuing length and intersection delay; calculating difference between the evaluating indexes on various phases of an intersection before and after optimization according to the measured values before and after optimization of the signal timing plan; determining an optimization direction of the signal timing plan and optimizing the signal timing plan according to difference between the traffic headway and / or the queuing length before and after optimization on the various phases of the intersection; evaluating the effect of the optimized signal timing plan according to the intersection delay; and taking an evaluating result as a basis for determining the optimization direction of the signal timing plan. By combination of two traffic information acquiring modes of data of a video detector and a probe vehicle, the signal timing plan optimization is evaluated, meanwhile, the integral effect of the signal timing plan is evaluated, and therefore, a signal timing plan control scheme which has feedback and iterative refinement functions is formed.

Description

technical field [0001] The invention relates to the technical field of intelligent traffic control, in particular to an evaluation method for an intersection signal timing scheme. Background technique [0002] At present, the increasing congestion of urban traffic has attracted social attention, which has brought unprecedented pressure to urban traffic management. In the management of urban road intersections, the use of intersection signal timing schemes can effectively regulate the traffic at intersections. Therefore, the role of traffic signal timing design is becoming more and more significant. However, the current timing scheme often has some problems in practical application, which leads to low traffic efficiency at road intersections. Therefore, it is necessary to evaluate the traffic signal allocation in order to optimize the timing scheme according to the evaluation results. [0003] At present, the method of evaluating the traffic signal timing scheme is generall...

AI Technical Summary

Problems solved by technology

However, there are still obvious defects in this existing evaluation method: First, the traffic parameters selected in the existing evaluation method are detected by mobile or fixed detectors, but the existing mobile or fixed detectors cannot be compared with the signal The computer forms a linkage application to evaluate the signal timing scheme in real time

The second is that the method of evaluating the signal timing scheme through the measured traffic parameters is not combined with the real-time changing traffic signal timing scheme, and cannot dynamically evaluate the effect of the signal timing scheme

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