Method for acquiring traffic capacity of circular intersection with double stop lines and signal control

Abstract

The invention relates to a method for acquiring a traffic capacity of a circular intersection with double stop lines and signal control. The method comprises the following steps of: 1) acquiring geometric design parameters of the intersection; 2) acquiring signal control parameters of the circular intersection with the double stop lines and the signal control; 3) separately calculating the trafficcapacity C<d> of a straight lane of an approach, the traffic capacity C<l1> of left turn vehicles passing a first stop line, the vehicle storage capacity C'<l2> of two regions of a left turn lane, and the traffic capacity C<l2> of the left turn vehicles passing a second stop line of the circular intersection with the double stop lines and the signal control; 4) acquiring the traffic capacity C<l>of the left turn lane of the circular intersection with the double stop lines and the signal control according to the left turn vehicles passing the first stop line and second stop line; and 5) calculating a total traffic capacity C of the single approach of the circular intersection with the double stop lines and the signal control. Compared with the prior art, the method has the advantages of simple calculation, considering the constraints of the capacity of a roundabout on the traffic capacity of the left turn lane, wide applicability and the like.

Description

technical field [0001] The invention relates to the technical field of urban road traffic signal management and control, in particular to a method for acquiring the traffic capacity of a circular intersection controlled by double stop line signals. Background technique [0002] Roundabouts, also known as "roundabouts", have the advantages of low conflict intensity and continuous traffic flow compared with ordinary level intersections. The study of the "American Highway Safety Handbook" shows that after the level signal-controlled intersection is transformed into a roundabout, the safety is significantly improved. In addition, the roundabout has a good landscape effect, and is often a geographical symbol of the city, embodying the deep urban emotions of the citizens. [0003] At present, my country's urban traffic congestion is becoming more and more serious. In the early days, roundabouts were mostly arranged in the center of the city, and there were often multiple interse...

AI Technical Summary

Problems solved by technology

First of all, the above-mentioned renovation measures lack humanistic sentiments, which brutally split the urban emotions of citizens, and are contrary to the current advanced concepts such as "urban restoration" and "existing stock potential".

Secondly, transforming the roundabout into an overpass will cause great damage to the urban environment, and the cost is high, and the social economy is not strong

Thirdly, transforming roundabouts into canalized level crossings often results in huge intersections, and multi-way roundabouts will become multi-way deformed intersections after transformation. It will be more difficult to control and manage in the later stage, not only can not solve the old problems but also will bring new problems

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