Urban main road left forbidding and left turning protection phase setting method

Abstract

The invention discloses an urban main road left forbidding and left turning protection phase setting method. Firstly the present flow, the number of lanes and signal timing plans of all phases of all intersections are acquired and inputted as for multiple continuous signal control intersections of urban main roads; then the redistribution result of the flow and the number of lanes after the intersection left forbidding or setting the left turning protection phase is calculated, and the green signal ratio and the green light time of each phase of the intersections are calculated according to the redistribution result; and finally a calculation model for the optimal setting location of urban main road left forbidding and the left turning protection phase is established. According to the method, congestion of the main roads caused by large demand of left turning traffic flow of the intersections of the main roads can be mainly alleviated, and the traffic capacity of the intersections of the main roads is ensured to be mutually matched by reasonably setting main road left forbidding and the left turning protection phase so that traffic congestion can be alleviated and the traffic delay can be reduced.

Description

technical field [0001] The invention belongs to the fields of traffic engineering and traffic information and control systems, and relates to the technical field of signal phase coordination design between intersections, and more specifically, relates to a method for setting the phases of prohibiting left and turning left on urban arterial roads. Background technique [0002] With the development of urbanization, the demand for traffic increases exponentially, and traffic congestion has become a regular phenomenon in major cities, especially the main roads in the morning and evening peaks, with high queuing delays and slow traffic speeds, which do not reflect the rapid accessibility of the main roads role. In order to alleviate traffic congestion on the main roads, traffic engineers have adopted a variety of traffic organization methods, and "forbidden left" has become one of the most important means. The left-hand ban at intersections has the following advantages: ① low co...

AI Technical Summary

Problems solved by technology

However, there is a lack of consideration of how to coordinate the settings of prohibiting left and left-turn protection phases at multiple intersections from the overall level of the main road.

According to the existing method, considering the current intersection, the main road and the main road are large-scale intersections, and the left-turn traffic demand is large, so the left-turn protection phase needs to be set, and the green light of the straight-going phase is correspondingly reduced, which is very easy to form a congestion point on the main road

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