Unsymmetrical space-time optimizing control method for rotary intersection

A technology for roundabouts and intersections, which is applied in traffic control systems, traffic control systems for road vehicles, and traffic signal control, etc., can solve the bottleneck that cannot effectively solve the traffic capacity bottleneck in the weaving area, and cannot effectively alleviate the congestion at the intersection. and other problems to achieve the effect of preventing deadlock, balancing saturation, and reducing the number of accidents

Inactive Publication Date: 2008-08-27
TONGJI UNIV
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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 c

Method used

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  • Unsymmetrical space-time optimizing control method for rotary intersection
  • Unsymmetrical space-time optimizing control method for rotary intersection
  • Unsymmetrical space-time optimizing control method for rotary intersection

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0022] 1. Implement two-step control on left-turn traffic flow

[0023] This law adopts a two-phase traffic signal control method for roundabout intersections, and the corresponding entrance roads, stop lines, and signal light facilities are arranged as shown in Figure-1. First of all, the first stop line, special left-turn lane and special left-turn signal light are set on the entrance road; in addition, the second stop line is set before the conflict point between the left-turn traffic flow of each entrance road and the left-turn traffic flow of the opposite entrance road on the ring road , and equipped with corresponding special signal lights. The left-turn traffic flow will pass through the intersection after passing through the secondary traffic signal (entrance traffic signal, ring road traffic signal). The layout of the first stop line...

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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...

Claims

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Application Information

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IPC IPC(8): G08G1/07G08G1/08G08G1/081G08G1/082G08G1/083E01C1/02
Inventor 杨晓光马万经沈峰
Owner TONGJI UNIV
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