Signal coordination control method for continuous intersections under oversaturated traffic state

Abstract

The invention relates to a signal coordination control method for continuous intersections under an oversaturated traffic state. The method comprises the following steps: (1) monitoring the queuing length of each phase of each intersection in real time, and when congestion occurs, determining the most downstream intersection where congestion occurs; 2, judging whether the queue length Qd of any one phase d of the most downstream intersection in a current cycle reaches an upper limit value Qd_max of the queue length, if yes, prolonging the green light time [delta]Gd of the d phase of the most downstream intersection in a next cycle and executing Step 3, otherwise completing regulation and control; (3) determining the key phase which affects the queuing length of the d phase the most downstream intersection in each upstream intersection; (4) prolonging the red light time of the key phase of each upstream intersection while prolonging the green light time of the d phase of the most downstream intersection; and (5) returning to Step (1) to perform repetitive execution. Compared with the prior art, the signal coordination control method provided by the invention prevents back overflowing and spreading of main roads between intersections more effectively.

Description

technical field [0001] The invention relates to a road traffic signal control method, in particular to a signal coordination control method for continuous intersections in an oversaturated traffic state. Background technique [0002] With the rapid growth of automobiles, the traffic pressure on the road network is increasing. Since urban road construction cannot keep up with the speed of vehicle development, the area of ​​the road network that can be built is becoming less and less, while the number of automobiles continues to grow. Two-thirds of urban traffic congestion has become the norm, especially in megacities where traffic congestion is regionalized and normalized, resulting in large-scale paralysis of road network traffic. Traffic congestion not only restricts the development of cities but also causes air pollution to become increasingly serious, which runs counter to the concept of sustainable development. [0003] The serious imbalance between traffic supply and t...

AI Technical Summary

Problems solved by technology

However, the traditional traffic flow model is usually established only based on the arrival-departure theory of vehicles, without considering the fluctuation of traffic flow, which is contrary to the actual operation of vehicles.

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