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Signal Timing Method of Four-way Roundabout Based on Rearward Movement of Stop Line

A roundabout and signal timing technology, which is applied in the direction of traffic signal control, road vehicle traffic control system, traffic control system, etc., can solve problems such as unbalanced traffic conditions at entrances, traffic congestion, etc., to improve space utilization, Relieve congestion and alleviate the effect of long queues

Active Publication Date: 2017-05-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of unbalanced traffic conditions at each entrance of the four-way roundabout, resulting in traffic jams, and to provide a signal timing method for the four-way roundabout based on the rearward movement of the stop line

Method used

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  • Signal Timing Method of Four-way Roundabout Based on Rearward Movement of Stop Line
  • Signal Timing Method of Four-way Roundabout Based on Rearward Movement of Stop Line
  • Signal Timing Method of Four-way Roundabout Based on Rearward Movement of Stop Line

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Experimental program
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specific Embodiment approach 1

[0025] Specific implementation mode one: combine Figure 1 to Figure 3 To illustrate this embodiment, the four-way roundabout signal timing method based on the rearward movement of the stop line described in this embodiment is:

[0026] Two different phases, Phase 1 and Phase 2 are respectively used to control two pairs of opposite entrances of the four-way roundabout; Phase 1 and Phase 2: three light colors of green, yellow and red are displayed in a cycle; Phase 1 and Phase 2 It is a conventional phase, that is, the cycle mode is exactly the same, except that when phase 1 displays a green light, phase 2 displays a red light;

[0027] When the motor vehicle flow difference of two opposite entrances is greater than or equal to the threshold value, move the stop line of the entrance with a larger motor vehicle flow among the two entrances to the rear, and set a yield line at the entrance;

[0028] When there is only one entrance where the stop line is moved backwards, the phas...

specific Embodiment approach 2

[0039] Specific implementation mode two: combination Figure 4 and Figure 5 Describe this embodiment. This embodiment is a further limitation of the four-way roundabout signal timing method based on the stop line moving backwards described in Embodiment 1. In this embodiment, the red light time of phase three is R i :

[0040]

[0041] In the formula:

[0042] i represents the serial number of the entrance where the parking line is moved backward, and the serial numbers of the north entrance, south entrance, east entrance and west entrance are 1, 2, 3 and 4 respectively. image 3 Take the phase scheme as an example, i=1,3;

[0043] A i ——Set the time of the yellow light at the entrance where the stop line moves backward, unit: s; A i is a known parameter;

[0044] L c——The distance from the yield line of the entrance where the stop line is moved backward to the confluence point of the roundabout, or the distance from the stop line of the entrance without a rearward ...

specific Embodiment approach 3

[0048] Specific implementation mode three: combination image 3 , Figure 6 and Figure 7 Describe this embodiment. This embodiment is a further limitation of the four-way roundabout signal timing method based on the rearward movement of the stop line described in Embodiment 2. In this embodiment, the yellow flashing time of Phase 3 is AF x :

[0049] AF x =g y +D-A x -R x

[0050] In the formula:

[0051] x, y represent the serial numbers of the two entrances when there are two entrances where the stop line is set to move backwards, with image 3 Take the phase scheme as an example. When x=1, the parameters including the subscript x represent the parameters of the north entrance. At this time, y=3, and the parameters including the subscript y represent the parameters of the east entrance; when x=3, the parameters including the subscript x Each parameter of the subscript substitutes the parameter of the east entrance, at this time y=1, and each parameter including the...

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Abstract

The invention discloses a signal timing method for a four-road ring intersection based on backward movement of a stop line, relating to a signal timing technology for a four-road ring intersection. The method solves the problem of traffic jam caused by unbalanced traffic state of each entry of the four-road ring intersection. According to the method, when two opposite entries have great motor vehicle flow difference, the stop line of the entry with large flow moves backward, and a give-way line is arranged at the entry; when the stop line of only one entry moves backward, third-phase control is adopted at the entry; when two non-opposite entries are present in the entries where the stop lines move back, third-phase and fourth-phase control are respectively adopted at the two entries; and when two opposite entries are present in the entries where the stop lines move back, the same phase control is adopted at the two opposite entries. Yellow flash is added between the red light and the green light in the third-phase and fourth-phase control. The method can balance the traffic flow distribution of the intersection and ease the traffic jam.

Description

technical field [0001] The invention relates to the urban traffic signal control technology, in particular to the signal timing technology of the four-way roundabout. Background technique [0002] Four-way roundabouts are widely used in China. Vehicles go around counterclockwise in the roundabout and follow the principle of giving way when entering the ring. This traffic flow organization method can avoid direct intersection, conflict and large-angle collision between vehicles, and is essentially a self-adjusting channelized traffic form. With the continuous increase of urban road traffic demand, the traffic capacity of many roundabouts has reached saturation and oversaturation. For this reason, signal control is generally carried out on the basis of ordinary roundabouts. When implementing traffic signal control, two signal phases are generally set at the roundabout, and the traffic flow in the symmetrical direction belongs to the same phase. For example, the traffic flow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/08G08G1/083
Inventor 刘少韦华别一鸣黄晓雷黎瀚涛李溪昂
Owner HARBIN INST OF TECH