A Method for Establishing an Optimal Model of Traffic Overflow Coordinated Control and Its Working Method

Abstract

The invention discloses an establishing method and a working method for a traffic overflowing coordinate control optimization model. The establishing method includes the following steps that a queuing length limiting condition model is established to obtain a phase different range which can prevent traffic overflowing from occurring; a phase different optimizing method is established based on the minimum delay to obtain a function relation between phase difference and delay time; according to different restraints, on the phase difference, of the queuing length limiting condition model and the minimum delay phase difference optimization method, the two restraints are combined to take the minimum value in an intersection, so that the traffic overflowing coordinate control optimization model which not only can prevent overflowing from occurring, but also can minimize vehicle delay time is obtained. The establishing method and working method have the advantage that the traffic overflowing phenomenon is effectively prevented from occurring at the morning and evening peak periods of city primary roads.

Description

technical field [0001] The invention relates to a method for establishing a traffic overflow coordination control optimization model and a working method thereof. Background technique [0002] The rapid economic development has promoted the pace of urban modernization, making people's travel methods more diverse and faster. Private cars began to appear in my country in the 1980s. By 2003, the number of cars had exceeded 10 million, and it took only three years to break through 20 million. At present, the number of cars in my country has exceeded 100 million. This huge number does not simply mean that people's travel is more convenient, but many problems such as traffic congestion, frequent accidents, environmental pollution, increased noise, etc. have resulted in a serious decline in people's quality of life. [0003] As the skeleton of the urban road network and the main artery of urban traffic, the urban trunk road bears huge traffic pressure. The traffic flow is large, t...

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Problems solved by technology

[0005] In addition, through the search of existing invention patents and technologies, it is found that the report on "road section traffic overflow control method" is still blank at home and abroad

[0006] The Chinese invention patent "Traffic Overflow Control Method Based on Video Feedback (201210062524.4)" uses video information to feed back the queuing situation of vehicles on the road section. Before the overflow occurs, the upstream red light signal is activated in advance to prevent vehicles from entering the road section. Although this method is very innovative, However, it is only applicable to situations where the saturation of local intersections is relatively high or a certain road section is prone to traffic overflow. Like the east-west main road in Jinan City, many adjacent intersections have high saturation during morning and evening peak hours. If it is purely to avoid Traffic overflow occurs in a certain road section and the upstream red light is activated in advance, which will break the coordinated control law of the main road, resulting in more vehicles queuing up at the upstream intersection, which will continue to propagate upstream and cause traffic overflow. However, this patent optimizes the adjacent intersections The phase difference between to avoid overflow can make up for this deficiency

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