Self-adaptation traffic signal control method for four-way roundabout

A roundabout and traffic signal technology, applied in the field of adaptive traffic signal control, can solve the problems of unable to automatically detect the flow of left-turn motor vehicles and difficult to generate signal control schemes

Active Publication Date: 2014-09-03
严格集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the existing circular intersection signal control method cannot automatically detect the flow of left-turning motor vehicles, fails to fully consider the influence of

Method used

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  • Self-adaptation traffic signal control method for four-way roundabout
  • Self-adaptation traffic signal control method for four-way roundabout
  • Self-adaptation traffic signal control method for four-way roundabout

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Experimental program
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specific Embodiment approach 1

[0058] Specific embodiment one: a kind of four-way roundabout self-adaptive traffic signal control method of the present embodiment, it realizes according to the following steps:

[0059] Step 1: Layout the loop coil detector at the four-way roundabout;

[0060] Step 2: Set the phase sequence of the four-way roundabout;

[0061] Step 3: Set up the four-way roundabout adaptive traffic signal control process;

[0062] Step 3.1 Set the minimum green light time, maximum green light time and yellow light time of phase i:

[0063] Phase i, i=1,2, minimum green light time g imin , unit: s, calculated according to formula (1):

[0064] g imin =7+max(L i / 1.2)-I i (1)

[0065] Among them: L i — the intersecting road width of the road where the phase i controls the traffic flow, m;

[0066] I i —The time of running yellow light after the green light of phase i ends, that is, the interval time between green lights, s;

[0067] I i The recommended value is 3 seconds.

[0...

specific Embodiment approach 2

[0104] Specific implementation mode two: the difference between this implementation mode and specific implementation mode one is: the step 1 is specifically:

[0105] A typical four-way roundabout includes four entrances and four exits. Induction coil detectors are arranged at each entrance and internal lane of the four-way roundabout. The length and width of the detector are both 2.0m. The center lines of the lanes coincide; at the entrance of the four-way roundabout, it is arranged at the position 3.0m behind the stop line of the lane; inside the four-way roundabout, it is arranged at the intersection of the extension line of the intersecting road centerline and the inner lane of the intersection ;

[0106] Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0107] Specific implementation mode three: the difference between this implementation mode and specific implementation mode one or two is: figure 1 Take the roundabout shown as an example, its phase sequence is as follows figure 2 As shown, the two phases display green lights in turn, and the step 2 is specifically:

[0108] Two phases are set at the four-way roundabout, and the two phases display green lights in turn; each phase controls two traffic flows, the traffic flows at the south and north entrances are controlled by phase one signal lights, and the traffic flows at the east and west entrances are controlled by phase one. Two signal light control. This setting method allows the two traffic streams with far entrances to pass at the same time, which can reduce the interweaving of motor vehicles in the ring and improve the traffic capacity.

[0109] Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a self-adaptation traffic signal control method for a four-way roundabout and belongs to the technical field of urban traffic signal control. The purpose is to solve the problems that an existing signal control method for the roundabout, the flow of left turning motor vehicles can not be automatically detected, influences on motor vehicles at an entrance by the left turning motor vehicles inside the roundabout fail to be sufficiently considered, and therefore the optimal signal control scheme is difficult to generate. The method includes the steps that step1, annular coil detectors are arranged at the four-way roundabout; step2, the phase sequence of the four-way roundabout is set; step3, the self-adaptation traffic signal control processes of the four-way roundabout are set. The self-adaptation traffic signal control method is applied to the field of traffic control.

Description

technical field [0001] The invention belongs to the technical field of urban traffic signal control, and relates to an adaptive traffic signal control method facing four-way roundabouts. Background technique [0002] In many cities in China, four-way roundabouts are often set up where arterial roads intersect with arterial roads. According to traffic rules, motor vehicles entering the roundabout need to give way to motor vehicles in the circle. When the roundabout does not use traffic signal control, when the flow of motor vehicles at one entrance is large and continuously enters the roundabout, the motor vehicles at other entrances need to give way all the time, which will lead to traffic at other entrances. Motor vehicle capacity has decreased, and delays and queue lengths have increased dramatically. This is especially true during peak periods. Based on this, traffic lights can be set at each entrance of the roundabout, and the right of way can be allocated to each ent...

Claims

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Application Information

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IPC IPC(8): G08G1/081
Inventor 别一鸣孙澄刘莹唐征征李溪昂曹阳
Owner 严格集团股份有限公司
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