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Multi-control target compound optimization method for traffic signals

A traffic signal and control target technology, which is applied in the field of compound optimization of multiple control targets of traffic signals, can solve problems such as low control efficiency and poor adaptability to real-time traffic changes, and achieve rapid changes in optimization, improve traffic control efficiency, and strong applicability Effect

Inactive Publication Date: 2012-10-03
TRAFFIC MANAGEMENT RES INST OF THE MIN OF PUBLIC SECURITY
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Problems solved by technology

[0005] The purpose of the present invention is to find a method suitable for compound optimization of multi-control targets at road intersections, so as to solve the problems of poor adaptability to real-time traffic changes and low control efficiency existing in the current traffic signal single-optimized control target method

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  • Multi-control target compound optimization method for traffic signals
  • Multi-control target compound optimization method for traffic signals
  • Multi-control target compound optimization method for traffic signals

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Embodiment Construction

[0040] The basic idea of ​​the multi-control target composite optimization method for traffic signal of the present invention is as follows: the one, the controlled crossing traffic signal control target is defined as the compound control target that is made of three single control targets of average number of stops, average delay and queuing length, PI= A 1 ×PI 1 +A 2 ×PI 2 +A 3 ×PI 3 , the PI value is minimized through optimization, the PI value is taken as an integer, and the decimal is rounded. The composite control target weight factor A 1 、A 2 、A 3 The value is combined with the real-time traffic saturation X (the average value of traffic saturation in this time period) and the traffic status of the controlled intersection for a certain time period (1-10 minutes), and the automatic and real-time adjustment is performed. A 1 +A 2 +A 3 =1,0≤A 1 , A 2 , A 3 ≤1,A 1 , A 2 , A 3 Two decimal places are taken, and the third decimal place is rounded off.

[0041...

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Abstract

The invention relates to road intersection traffic signal control, in particular to a multi-control target compound optimization method for traffic signals used in a road intersection. The method comprises the following steps that: 1, control targets of the traffic signals of a controlled road intersection are defined as a compound control target consisting of three single control targets, namelyan average parking number, an average delay, and a queue length; and a control target value is minimized by optimizing; 2, when the controlled road intersection is in a light traffic state or an intermediate traffic state, the control targets are compounded; simultaneously the three single control targets, namely the average parting number, the average delay and the queue length are taken into consideration; and a compound target value is minimized by optimizing; and 3, when the controlled road intersection is in a heavy traffic state, the single control target, namely the queue length accounts for all weight; and the compound control target equals to the single control target, namely the queue length. In the method, control target optimization combination is adopted, the applicability ishigh, the traffic control efficiency can be improved, and optimized control targets can automatically respond the rapid change of real-time traffic.

Description

technical field [0001] The invention relates to a traffic signal multi-control target composite optimization method applied at road crossings, which is used for optimal control of road crossing traffic signals. Background technique [0002] Traffic signal optimization control is based on the real-time traffic information provided by the vehicle detector, and based on an optimization algorithm, the optimal traffic light timing scheme (including cycle length, red light duration, and green light duration) is automatically calculated to realize traffic control at road intersections. optimized control. At present, the optimal control of traffic signals is based on selecting a single control target and running the optimal traffic light timing scheme calculated based on a corresponding optimization algorithm. [0003] Commonly used traffic signal control objectives at road intersections include the average number of stops, average delay, and queue length. The purpose of optimizati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/07G08G1/08
Inventor 袁建华赵永进郑煜
Owner TRAFFIC MANAGEMENT RES INST OF THE MIN OF PUBLIC SECURITY
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