A green-wave coordinated control timing method for arterial roads based on maximizing green-wave width

Abstract

The invention discloses a green wave bandwidth maximization-based artery green wave coordination control timing method. The method comprises the following steps: (1) investigating geometry setting parameters and basic timing parameters at signal intersections of an artery, and calculating conversion distances Di between the intersections; (2) calculating the value ranges and the iterative steps of ideal signal distances to obtain a value set A of the ideal signal distances; (3) partitioning the relative positions of ideal signals, based on the calculating rule of green wave loss, calculating the largest green wave bandwidths GWBj of the artery under all possible ideal signal distance values Aj; (4) selecting the largest value among GWBj as the optimal green bandwidth GWB*, and calculating the green time difference of each intersection so as to obtain a coordination control timing scheme with the largest artery green wave bandwidth.

Description

technical field [0001] The invention belongs to the technical field of trunk line green wave control in traffic signal control, and relates to a coordinated control timing method for maximizing the width of the two-way green wave band of the trunk road. Background technique [0002] Most of the intersections on the arterial roads of the urban road network in my country are signal-controlled intersections. When single-point signal control is performed, vehicles frequently stop at the intersections, which leads to traffic problems such as low road network operation efficiency and increased travel delays. In order to reduce the parking time of vehicles at various intersections, it is of great significance to improve the traffic conditions of the whole city by unifying a group of adjacent traffic signals on a trunk line for coordinated control and reducing traffic delays and parking rates of traffic flow on the trunk line . [0003] There are two main design principles for the ...

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Problems solved by technology

[0004] However, it can be found through the verification of the graphic method that the green wave bandwidth of the timing scheme given by the traditional numerical solution method is not the largest green wave bandwidth

In addition, the scheme of changing the speed limit value proposed by the traditional numerical solution method is difficult to realize in the actual urban arterial road. In fact, the speed limit of the urban arterial road is generally uniform, and the driving speed of vehicles on the same road section is relatively stable.

Furthermore, the traditional numerical solution only considers the calculation of the green wave bandwidth under ideal conditions, and does not consider the delays that may occur in the actual road section, such as delays caused by bus stops and delays caused by vehicles queuing in advance at intersections

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