Traffic control method for dynamic coordination according to effective capacity of road section

Abstract

The invention discloses a traffic control method for dynamic coordination according to effective capacity of a road section. The method comprises the following steps of: first, proposing an effective bandwidth evaluation method to monitor the running state and the control effect of the existing trunk-road green-wave coordinating and controlling system; and second, learning from a TCP / IP (Control Protocol / Internet Protocol) window flow control thought, and designing a window-flow-controlled trunk-road dynamic coordinating and controlling method to control the crowed traffic flow of urban trunk roads. Simulation tests and compared results show that a downstream intersection can inform the effective capacity of the road section to an upstream intersection in real time in a mode of a window flow notice, and a traffic signal machine of each intersection can conveniently redistribute the green time of each traffic flow according to the current traffic demand and the effective capacity of the road section to avoid the overlong green time to cause queuing vehicles in the road section to overflow.

Description

technical field [0001] The invention relates to the field of urban traffic arterial control, in particular to a method for calculating the effective capacity of road sections. Background technique [0002] The existing arterial coordinated control method mainly seeks to maximize the green wave bandwidth under given traffic conditions by adjusting the signal timing parameters of adjacent signalized intersections, so it is also called arterial green wave coordinated control. Practice has proved that the green wave coordinated control of the main line has a good control effect in the unsaturated condition, but it is far from the expected control effect in the saturated and oversaturated condition, and even the queuing vehicles overflow to the upstream intersection, resulting in a green light at the upstream intersection During this period, the vehicle cannot pass through the "deadlock" phenomenon. Judging from the development trend of existing products, when designing the gree...

AI Technical Summary

Problems solved by technology

However, the existing research still lacks consideration in two aspects. On the one hand, there is a lack of real-time monitoring of the operating status of the green wave coordinated control system on the trunk line; on the other hand, there is a lack of real-time detection of the effective space of the road section.

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