Arterial traffic four-intersection control sub-area bidirectional green wave coordination control method

Abstract

The invention relates to an arterial traffic four-intersection control sub-area bidirectional green wave coordination control method based on phase sequence optimization. A new cycle calculating formula is provided, the problem that a signal cycle value obtained with an original cycle formula is small is solved, and a more reasonable signal cycle is generated. A four-intersection phase sequence simultaneous-optimization method is designed, the phase sequence of intersections of four-intersection control sub-areas is optimized through a speed prediction control reward function, guide vehicle speeds corresponding to different road sections are given according to the optimized phase sequence, smooth bidirectional green waves are formed by the control sub-areas, and phase segmentation and upper-lower-line phase conflicting are avoided. The arterial traffic four-intersection control sub-area bidirectional green wave coordination control method has the advantages that the more reasonable signal cycle is generated, the vehicle speed on an artery can be highest within an allowed range under the manual control condition, the traveling time is saved, phase changes of the intersections are stable and smooth, the integrity of the phase sequence green time is guaranteed, conflicting of an original artery coordination control mode to control over road physical conditions and phase segmentation are overcome, and the arterial traffic four-intersection control sub-area bidirectional green wave coordination control method is an efficient and simple artery coordination control method.

Description

technical field [0001] The invention belongs to the field of traffic control, and in particular relates to a two-way green wave coordinated control method for the four-intersection control sub-area of ​​a traffic arterial line based on phase sequence optimization. Background technique [0002] In traffic signal control, signal period is a key control parameter. At present, the more commonly used method is to use the Webster period formula to determine the signal period. This formula is a method to calculate the signal timing with the goal of minimizing the vehicle delay time. Its core content is the calculation of vehicle delay and optimal cycle length. It is a very convenient cycle calculation method. However, the webster cycle formula is designed according to the traffic conditions in foreign countries, which is very different from the traffic conditions in my country, resulting in small calculation results that cannot meet the needs of traffic control in my country. Ther...

AI Technical Summary

Problems solved by technology

Gartner proposed MULTIBAND on the basis of the MAXBAND method, and many important features have been improved, such as the clearing time of vehicle queues, left-turning vehicles, and different bandwidths in different sections of the trunk line. Strict physical requirements, such as intersection spacing must be equal or multiplied, otherwise the effect will be compromised, so it is difficult to promote and apply in practice

There are also relatively mature methods in China. For example, in the trunk line two-way green wave coordinated control method whose publication number is CN101325008A, the trunk line green wave coordinated control is carried out by calculating the trunk line coordination parameters uplink phase difference and downlink phase difference. Similarly, this optimized phase difference control method In the actual operation process, it is unavoidable that the uplink and downlink phases of a certain intersection are coincident or discrete, and the measures to be taken when they occur can only be sacrificed by sacrificing the passing bandwidth of a coordinating phase of a trunk line

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