Traffic signal control method for road intersections

A technology of traffic signals and control methods, applied in the direction of controlling traffic signals, the arrangement of variable traffic instructions, etc., can solve the problems of driver adaptability and poor operability without considering the lane, so as to reduce vehicle delays and improve service levels. Effect

Inactive Publication Date: 2018-04-06
SOUTHWEST JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

Most of the existing studies only consider simple time optimization or the implementation of variable steering lane strategy for space optimization, and some collaborative optimization studies are only from a theoretical point of view, assuming that the signal scheme and lane functions change at the same time, ignoring the frequent changes in lane functions. The increase of lane-changing behavior and reaction time caused by the change does not consider the adaptability of the driver during the lane function change process, and the operability is poor

Method used

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  • Traffic signal control method for road intersections
  • Traffic signal control method for road intersections
  • Traffic signal control method for road intersections

Examples

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Embodiment

[0068] Taking the intersection of the First Ring Road and Dashi Road in Chengdu, China as an example, the pattern of the intersection is the same as figure 1 Similarly, the method for constructing the traffic state prediction system of the present invention will be described in detail with reference to the accompanying drawings.

[0069] 1. Lay coils on the straight-going and left-turning lanes of the west entrance, and obtain a sample size of 6,000, including 3,000 left-turning and straight-going vehicles;

[0070] 2. Based on the fuzzy C-means clustering method, for straight-through vehicles, the number of categories c=6, the sample size N=3000, the weight index m=2, and the cluster center V t , similarly, the left-turn vehicle cluster center V l ,

[0071]

[0072] The traffic states represented by each row of straight vehicles from top to bottom are: 4, 2, 6, 1, 3, 5. The traffic status represented by each line from top to bottom of a left-turning car is: 2, 1, 6, 3...

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Abstract

The invention belongs to the field of urban road intersection control and relates to a traffic signal control method for road intersections. The present invention provides an idea of combinatorial optimization from the two-dimensional perspective of time allocation and space allocation, uses a variable steering strategy and a signal optimization strategy simultaneously at a signal intersection, and clears remaining vehicles in a lane by setting a pre-signal, and the operability problem in a process of changing the attributes of a variable guided lane. From the collection of traffic data to thetriggering and operation of the function change of the variable guided lane, and to the optimization of an intersection signal system, the method provides a systematic, complete and implementable technical solution to reduce vehicle delays at the intersection and improve the service level at the intersection.

Description

technical field [0001] The invention belongs to the field of urban road intersection control and relates to a traffic signal control method for road intersections. Background technique [0002] The intersection is the place where the traffic flow of all directions in the urban road network converges. Vehicles change direction and interfere with each other here, resulting in the intersection capacity being lower than the road section, becoming the bottleneck of the urban traffic network and the source of traffic congestion. The left-turn traffic flow is the traffic flow with the most conflict points, and it is also the most important factor affecting the traffic efficiency of grade intersections. Therefore, an important means to alleviate urban traffic congestion is to ensure smooth traffic at intersections, and the key to improving the traffic environment at intersections is to organize left-turn traffic flows. [0003] Conventional left-turn traffic organization optimizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/08G08G1/09
CPCG08G1/08G08G1/09
Inventor 刘昱岗唐李莹
Owner SOUTHWEST JIAOTONG UNIV
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