Unsymmetrical space-time optimizing control method for rotary intersection

Abstract

The invention relates to a method for optimizing and controlling the dissymmetrical space time of a roundabout; each inlet of the roundabout is provided with two sets of signal lamps which assign wayleaves to loop vehicles and intra-annular vehicles in turn in order that the vehicles pass through an annular-island interleaving section alternately according to a signal lamp control proposal. According to the condition of annular-island flow rate, the traffic signal time of a left-hand traffic flow is determined with the largest parking number as a constraint condition; in addition, the starting and the intermitting time of a traffic signal in a transverse and intersectant inlet road takes the safety of the traffic flow and the need of the largest traffic into account, actualizes flexible control measures and best coordinates and utilizes the space-time resource of the roundabout. According to the dynamic change of the traffic flow, the optimal control is carried out. The method for optimizing and controlling the dissymmetrical space time of the roundabout can effectively relieve the conditions of congestion and deadlock in the intersectant roundabout, improve the safety of the roundabout and is easy for practical application.

Description

technical field [0001] The invention belongs to the technical field of road traffic control, in particular to a control technology capable of improving congestion at roundabouts and reducing the number of accidents at the intersections. Background technique [0002] Due to the simple management means of uncontrolled roundabouts, which can effectively reduce vehicle delays under low traffic conditions, reduce traffic accident rates, and optimize the environment, the utilization rate is relatively high in the early construction of various cities in my country, and it is also It solved some problems of urban traffic at that time very well and played a certain positive role. [0003] However, with the continuous and rapid development of my country's economy, the number of motor vehicles in cities has continued to increase, and the traffic flow has also increased, exceeding the generally considered optimal traffic flow limit for uncontrolled roundabouts, that is, the traffic volum...

AI Technical Summary

Problems solved by technology

[0006] At the same time, the uncontrolled roundabout, because its capacity is limited by the weaving area, can not effectively relieve the congestion of the intersection through the widening of the conventional intersection approach; while the approach similar to the conventional intersection Signal control also cannot effectively solve the traffic capacity bottleneck problem in the weaving area

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