Signal timing optimization method based on variable guide lane

Abstract

The invention discloses a signal timing optimization method based on a variable guide lane. After the functional attribute of the variable guide lane is changed, each veering traffic flow saturability is obtained by each veering traffic volume obtained by a detector, and different signal timing optimization schemes are determined according to the saturability. The method particularly comprises the steps that when the saturability is lower, smallest delay is taken as a control target, and a period and signal timing are determined by adopting a traditional Webster method; when the saturability is larger than 0.9, the intersection traffic capacity improvement and the delay reduction are taken as targets, and when some veer is over-saturated, the period and the green signal ratio are adjusted by a hill-climbing method; when each veer is saturated, a phase position is added on basis of common four phase positions, a phase position group is redistributed, a key phase position chain of each combined phase position group is found, and green signal lamp time is distributed according to an equisaturation principle; the aims of reducing total delay at an intersection and improving the traffic capacity are achieved.

Description

technical field [0001] The invention belongs to the field of road traffic control, and in particular relates to a method for determining signal timing according to different road saturations after the functional attribute of a variable guiding lane changes. Background technique [0002] With the development of social economy and the rapid increase of car ownership, traffic congestion in many large and medium-sized cities is also becoming more and more serious. Urban intersections are the "narrow roads" of road capacity in the urban road network, and are frequent points of traffic disorder and traffic accidents. One of the keys to solving the problem of urban traffic congestion is to improve the traffic efficiency of urban intersections. Whether the lane function division and signal timing design are reasonable will directly affect the operation status of the entire urban traffic network. [0003] Variable lane management technology is a dynamic traffic management and contro...

AI Technical Summary

Problems solved by technology

Although the existing studies discuss the signal control under low flow and high flow separately, they all use the Webster method to adjust the signal, ignoring the defects of the Webster method when dealing with saturated traffic.

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