Single-point bottleneck oriented upstream region signal control parameter optimization method

Abstract

The invention discloses a single-point bottleneck oriented upstream region signal control parameter optimization method. The single-point bottleneck oriented upstream region signal control parameter optimization method can be used for solving a road section bottleneck from a regional level by accurately describing space-time correlation characteristic of a traffic state of an internal node in a region and reasonably regulating signal timing parameters of an upstream node. The single-point bottleneck oriented upstream region signal control parameter optimization method comprises the following concrete steps: building a traffic flow contribution rate model, and determining regulation traffic flow and a control region according to a set threshold; then calculating flow rate difference between arrival and departure in the original control scheme; calculating the total regulation amount of upstream and downstream input capacities required by initial queuing; distributing the total regulation amount; and regulating green-time ratio of the traffic flow, and finally obtaining a bottleneck control scheme. The single-point bottleneck oriented upstream region signal control parameter optimization method is based on upstream flow rate of a bottleneck road section, comprehensively considers multiple traffic flow parameters, can automatically identify a bottleneck traffic flow and control bottleneck-related road crossings in real time, solves bottleneck congestion rapidly and effectively, and is easy in engineering realization.

Description

technical field [0001] The invention relates to an upstream region signal control parameter optimization method oriented to a single-point bottleneck, which is used for urban traffic control and management and belongs to the field of intelligent traffic research. Background technique [0002] With the continuous development of urban economy and the continuous expansion of urban scale, the problem of urban road traffic congestion is becoming more and more serious, which seriously affects people's daily life and the stable development of society. How to find effective ways to control traffic congestion is an important issue in traffic engineering today. One of the research hotspots in this field. [0003] The unbalanced temporal and spatial distribution of traffic demand in the road network will cause the queue length of individual road sections to be close to or even equal to the length of the road section, which will affect the normal release of traffic flow at upstream inte...

AI Technical Summary

Problems solved by technology

As an important node in the urban road network, the bottleneck intersection may cause the "domino" and "deadlock" phenomenon of urban road network congestion, resulting in serious paralysis of road network traffic, resulting in serious economic and social losses

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