A Method of Intersection Phase Time Allocation Based on Traffic Demand Balance

Abstract

An intersection phase time allocation method based on passing demand balance, comprising the following steps: 1) listing all traffic stream combinations the total time durations of which are known and a passing time of which is to be allocated; 2) calculating the shortest passing time required by each of the traffic stream combinations in step 1); 3) calculating a quotient value between the total time duration and the shortest passing time of each of the traffic stream combinations; 4) selecting a traffic stream combination with the minimum quotient value, and allocating a passing time and a phase time; and 5) determining whether the passing time of all the traffic streams is determined, and if so, the allocation of an intersection phase time being completed, and if not, returning to step 1), and entering the next round of allocation of a passing time and a phase time of a traffic stream. In the method, the passing demand of all critical traffic streams and non-critical traffic streams, and of dependent-phase traffic streams and cross-phase traffic streams are taken full consideration. A programmed intersection signal phase time allocating method is provided. A passing time of the cross-phase traffic streams and the non-critical traffic streams is optimised.

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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