A single-point control method for preventing and controlling traffic overflow at intersection exits with intelligent detection

Abstract

The invention relates to an intelligent detection-based overflow prevention and control method for the traffic flow at the outlet of a single-point control intersection. The method solves the trafficjam problem caused by the queue overflow of the traffic flow at each outlet during the peak hours of the traffic flow at the single-point control intersection, wherein the traffic jam problem is ubiquitous in cities. According to the technical scheme of the invention, a detection region is arranged at the guide channel of an outlet. The overflow conditions of the traffic flow are divided into three conditions: the queuing overflow early warning, the queue overflow congestion alarm and the intersection congestion event alarm through the parameter judgment process. Through rapid disposal of thefront two conditions can be realized through comprehensively adopting the operations of phase adjustment, phase sequence adjustment, green light time length adjustment, interval time adjustment and the like. For the intersection congestion event alarm condition, the manual participation is required for severe congestion events. According to the detection scheme of the invention, the defect in theprior art that the data accuracy is low caused by incoming and outgoing vehicles at the outlet can be overcome. Meanwhile, the rapid disposal of the queue overflow condition can be realized by comprehensively applying traffic signal grooming techniques. The method is better in practicability compared with the prior art.

Description

technical field [0001] The invention relates to the field of urban traffic signal control, in particular to an intelligent detection single-point control method for preventing and controlling traffic flow overflow at intersection exits. Background technique [0002] Single-point signal control intersections are common in urban traffic management. Such intersections mostly use single-point multi-period timing control, that is, according to the operating characteristics of the traffic flow at the intersection, the operating periods of the time-scheduled scheme are divided, and the signal controller pre-sets Determine the timing scheme, including design phase, phase sequence and preset signal cycle, green light duration, interval duration and other parameters. The adaptability of timing scheme and traffic flow will greatly affect the traffic condition of the intersection. [0003] At present, the rapid growth of cars leads to a concentrated blowout state of traffic flow during...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the "deadlock" problem of the intersection caused by the overflow of exit traffic flow at the single-point signal control intersection and the low accuracy of judging the queue overflow situation in the prior art, and the practical applicability of the queue overflow situation disposal technology. In view of the strong defects, a single-point control method for the prevention and control of traffic flow overflow at intersection exits with intelligent detection is proposed, and a method for early warning and rapid disposal of queuing overflow conditions that is more in line with actual traffic flow guidance is proposed

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