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An Optimal Method for Coordinated Control of Signals at Urban Road Intersections Under Saturated Conditions

A technology of coordinated control and optimization methods, which is applied in the direction of controlling traffic signals, etc.

Active Publication Date: 2016-12-28
上海济安交通工程咨询有限公司
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  • Description
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Problems solved by technology

[0006] Under the condition of oversaturation, the queuing overflow technology at the intersection is an important content of the coordinated control of traffic signals, but there are many deficiencies in the queuing overflow control technology under the condition of oversaturation in various systems that have been applied so far

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  • An Optimal Method for Coordinated Control of Signals at Urban Road Intersections Under Saturated Conditions
  • An Optimal Method for Coordinated Control of Signals at Urban Road Intersections Under Saturated Conditions

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[0031] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0032] The optimization method of signal coordination control under the condition of oversaturation of urban road intersections of the present invention, on the basis of single-point signal control at intersections, uses the signal phase difference between upstream and downstream intersections as an important parameter to perform queuing overflow control at intersections, symbol definition as follows:

[0033] (1) Intersection distance L: the distance between two adjacent intersections, the distance from the stop line at the upstream intersection to the stop line at the downstream intersection is used for calculation.

[0034] (2) Queue length q: the queue length of the queued vehicles extending from the stop line to the upstream when the green ...

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Abstract

The invention discloses an optimization method for signal coordination control of urban road intersections under an over-saturation condition. Compared with the prior art, based on analysis of upstream and downstream traffic stream states of adjacent intersections, through using the wave theory for reference, and by comparing sizes of stop waves of upstream intersections and start waves of downstream intersections as well as vehicle queue conditions of upstream intersections in an artery direction, status values of signal control intersections are determined, and the signal coordination control reliable interval (phase difference) under different states is obtained, accordingly, queue overflow of over-saturation intersections can be controlled within a certain range, the probability of deadlocks at the over-saturation intersections can be reduced greatly, and the queue overflow becomes beneficial self-adjustment of the road intersections under the over-saturation condition.

Description

technical field [0001] The invention relates to an optimization method for signal coordination control, in particular to an optimization method for signal coordination control under the oversaturated condition of urban road intersections used in the field of intelligent transportation for signal coordination control of road intersections. Background technique [0002] Urban road intersection signal coordination control system is playing an increasingly important role in urban traffic, and urban traffic managers are trying to use urban traffic signal coordination control system to alleviate urban traffic problems. Due to the rapid growth of motor vehicles, many cities have experienced saturation or even oversaturation of road traffic. Under the condition of oversaturation, the traffic capacity between intersections does not match, which will cause queuing aggregation and easy queuing overflow. [0003] The urban road intersection signal coordination control system has the adv...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/07G08G1/08
Inventor 王浩杨晓光谢峰李晓丹毛礼麒李天雷齐立群吴翱翔
Owner 上海济安交通工程咨询有限公司
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