Method and system for calculating green time of each phase of signalized intersection

Abstract

The invention relates to a method and a system for calculating green time of each phase of a signalized intersection. The method comprises the following steps of: setting a service traffic objective function of the signalized intersection; setting the maximum green time and the minimum green time of each phase green lamp in a period, wherein the green time of each phase is shorter than or equal to the maximum green time and is longer than or equal to the minimum green time and the sum of the green time of all the phases is cycle time; setting a proportionality coefficient to ensure a ratio of the green time of any two phases in the current period less than or equal to the product of the proportionality coefficient and a ratio of flow rates of the corresponding phases in the previous period; and under the constraint conditions, by traversing the proportionality coefficient, calculating the green time of each phase of the signalized intersection so as to ensure the intersection to have the maximum service traffic. According to the method, the ballast and gradient traffic flow can be well processed, the mutative traffic flow can be rapidly responded, the largest number of vehicles can pass through the intersection and the service level of the signalized intersection is improved.

Description

technical field [0001] The invention relates to the field of urban traffic signal control, in particular to a method and system for calculating the green light time of each phase at a signalized intersection that can be better adjusted in response to gradual and sudden changes in traffic conditions. Background technique [0002] In recent years, with the development of social economy, the acceleration of urbanization and the rapid increase of motor vehicles, urban traffic problems have become increasingly serious, and urban traffic pressure is increasing, especially at signalized intersections. Therefore, under the selected cycle conditions of the signalized intersection, the green light time of each phase can be allocated more reasonably, so that the service flow of the intersection is maximized, and through self-adaptive adjustment as much as possible, the empty space is reduced and the green light time utilization is improved. Improve the traffic service level of road int...

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the problem of unreasonable and defective time allocation of the signal lamp time allocation method for sudden or congested traffic situations in the prior art, and provides a signal that can be better adjusted for gradual and sudden changes in traffic conditions. Calculation method of green light time of each phase at intersection

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