Intersection phase time distribution method based on pass demand balance

Abstract

The invention discloses an intersection phase time distribution method based on a pass demand balance. The method comprises the following steps: 1, listing all traffic flow combinations with a known total time length and to-be-distributed pass time; 2, calculating shortest pass time needed by each traffic flow combination in the first step; 3, calculating a quotient by dividing the total time length of the traffic flow combinations by the shortest pass time; 4, selecting a traffic flow combination with the smallest quotient, and carrying out distribution of pass time and phase time; and 5, determining whether the pass time of all traffic flows are already determined, if so, completing intersection phase time distribution, and otherwise, returning to the first step and performing a next round of traffic flow pass time and phase time distribution. According to the invention, by taking the pass demands of all critical traffic flows and noncritical traffic flows, independent phase traffic flows and cross-phase traffic flows into full consideration, the programmed intersection signal phase time distribution method is given, and optimization of the pass time of the cross-phase traffic flows and the noncritical traffic flows is realized.

Description

technical field [0001] The invention relates to the field of traffic signal control, in particular to an intersection phase time allocation method based on traffic demand balance. Background technique [0002] Phase time is a key parameter that needs to be determined when designing single intersection signal timing, and its value plays a vital role in preventing road traffic congestion and reducing intersection parking delays. The longer the time of a certain signal phase is, the more favorable it is for the passage of vehicles in this signal phase, but at the same time it will be unfavorable for the passage of vehicles in other signal phases. [0003] When the minimum average delay time of key traffic flows at the intersection is used as the phase time allocation principle, it is required that the saturation of each key traffic flow should be approximately equal, and the total saturation of the intersection should be minimized, and the phase time of each signal should be ba...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the design of intersection signal phase time allocation schemes only pay attention to the traffic benefits of key traffic flow and independent phase traffic flow, and often adopt the direct decomposition or superimposed allocation method, thus ignoring the traffic demand of non-key traffic flow and cross-phase traffic flow , so from the point of view of the operational benefits of the entire intersection, it cannot meet the global optimization requirements of signal timing at the intersection

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