Stage-phase signal control scheme-oriented timing parameter optimization method

Abstract

The invention discloses a stage-phase signal control scheme-oriented timing parameter optimization method. The method includes the following steps that: 1, the lane information of a signalized intersection, the signal control scheme of the signalized intersection and the traffic volume of each lane are acquired, a lane information table and a signal timing plan table are generated; 2, the two tables form lane-phase mappings; 3, a phase-stage distribution relationship table is extracted; 4, the demand green signal ratio of each phase is obtained according to the target saturability of each phase, a linear programming equation model is constructed with the saturability of the intersection adopted as an optimization target, and an optimal cycle duration and the green light duration of each stage are obtained and are adopted as signal timing scheme optimization results; and 5, the signal timing scheme optimization results are inputted into an intersection traffic signal controller. The stage-phase signal control scheme-oriented timing parameter optimization method of the invention satisfies a domestic single-loop signal timing scheme structure, and can realize self-optimization and high accuracy of signal timing.

Description

technical field [0001] The invention relates to an optimization method for a signal control scheme, in particular to a timing parameter optimization method for a phase-phase signal control scheme. Background technique [0002] Traffic signal control is one of the core means of urban road traffic management and control. Optimizing intersection signal timing plays an important role in alleviating urban road traffic congestion and improving road network operation efficiency. According to statistics, there are about 130,000 traffic signal control intersections in my country. Faced with such a huge workload, the urban traffic management department urgently needs the support of intelligent intersection signal optimization technology, tools and systems. [0003] At this stage, the signal control methods adopted by Chinese cities mainly include three categories: fixed timing, inductive and adaptive control. Fixed time allocation divides a day into several control periods, and sets...

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Problems solved by technology

However, in fact, this kind of tuning tool has not been popularized and applied on a large scale. The main reasons include: 1) my country has adopted a single-loop signal timing scheme structure based on phase-phase structure, which is different from foreign countries with a double-loop structure. 2) A class of optimization algorithms represented by the smallest indicators such as delay and queuing length, the index modeling and estimation methods are highly complex, and the accuracy and reliability need further verification and testing; 3 ) The methods used by existing tools have high requirements for data completeness, and need the complete data of each flow direction as the basis, and cannot be reasonably optimized based on partial data; 4) The standards for the definition of signal timing schemes in my country are not uniform, and there are differences between cities There are large differences, and the scheme design is also diversified, requiring a more flexible optimization method

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