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All-red signal control method for yellow light dilemma

A signal control and dilemma technology, applied in the field of full red signal control, can solve problems such as difficulty in adequately protecting vehicles, difficulty in effectively avoiding the dilemma of yellow lights, etc., so as to avoid wasting green light time, improve traffic efficiency, and facilitate calculation.

Inactive Publication Date: 2017-03-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the existing measures to solve the dilemma of signalized intersections that it is difficult to effectively avoid the yellow light dilemma, it is difficult to fully protect the vehicles caught in the yellow light dilemma, and it is difficult to realize the signal crossing under the premise of ensuring traffic safety In order to solve the problem of maximizing traffic efficiency at the entrance, a method of all-red signal control for the yellow light dilemma is proposed.

Method used

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  • All-red signal control method for yellow light dilemma
  • All-red signal control method for yellow light dilemma
  • All-red signal control method for yellow light dilemma

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specific Embodiment approach 1

[0024] In the all-red signal control method for the amber light dilemma of this embodiment, the all-red signal control method for the amber light dilemma includes the speed of the first car and the distance from the first car to the stop line in different states within the duration of the amber light Continuous acquisition, judgment of vehicle driving behavior in the dilemma area, and determination of the maximum full red signal duration are four key operating steps. The control method implemented by integrating the four key operating steps includes the following steps:

[0025] Step 1: Determine whether the intersection forms a yellow light dilemma, and perform the operation of step 2 for the intersection that forms a yellow light dilemma;

[0026] Step 2: According to the distribution of the yellow light dilemma formed in step 1 under different speed conditions, determine the detection range of the smart sensor [0,X S max ], where X S max Denotes all minimum stopping distan...

specific Embodiment approach 2

[0035] The difference from Embodiment 1 is that in the all-red signal control method facing the yellow light dilemma in this embodiment, the process of judging whether the intersection forms a yellow light dilemma in step 1 is as follows:

[0036] Step 11. Determine the minimum distance between the position of the vehicle that has not passed through the traffic intersection when the yellow light turns on and starts to brake, and the position when it decelerates to a complete stop, as the minimum stopping distance X S ;

[0037] Step 1 and 2: Determine the maximum distance between the position of the vehicles passing through the intersection safely when the amber light is on and the stop line when the amber light is on, as the maximum passing distance X C ;

[0038] Step 13: Compare the minimum parking distance X S and the maximum passing distance X C size; when X S >X C When , it means the formation of a dilemma; when X S C When , it means that a selection area is formed...

specific Embodiment approach 3

[0049] The difference from the first or second specific embodiment is that in the all-red signal control method facing the yellow light dilemma in this embodiment, the detection range of the smart sensor is determined in step 2 [0, X S max The process of ] is to obtain the yellow light duration τ, the width of the intersection and the speed limit value for the signalized intersection, and to determine the detection range of the smart sensor as [0 ,X S max ].

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Abstract

The invention discloses an all-red signal control method for a yellow light dilemma area and belongs to the field of intelligent traffic control. According to existing signal intersection dilemma solutions, the yellow light dilemma area can not be avoided effectively, vehicles trapped in the yellow light dilemma area can not be protected sufficiently, and maximum traffic efficiency at a signal intersection is hard to obtain on the premise that traffic safety is guaranteed. The method comprises the steps of determining a detection range according to the distribution of the yellow light dilemma area; acquiring the speed of the first vehicle on each through lane and the distance between each first vehicle and a stop line within the detection range continuously from the moment a yellow light is on; judging whether the situation that the dilemma area can not be formed under all the speeds of the first vehicles is true; judging whether the situation that all the first vehicles the speeds of which enable the dilemma area to be formed when the yellow light is on are not trapped in the dilemma area is true; calculating the maximum all-red signal duration for all the first vehicles which are trapped in the dilemma area and continue to travel, feeding the duration back to a traffic signal controller, and switching on an all-red signal after a yellow light signal ends. By the adoption of the method, the vehicles which are trapped in the dilemma area and continue to travel can pass the intersection safely, and the traffic efficiency at the intersection can be improved.

Description

technical field [0001] The invention relates to an all-red signal control method facing a yellow-light dilemma. Background technique [0002] On the entrance road of signalized intersection, there is such an area, that is, the yellow light dilemma zone, in which the vehicles trapped in it can neither stop safely in front of the stop line nor pass through the intersection safely within the interval of the yellow light. If you choose to stop, you need to brake urgently, which may easily lead to a rear-end collision accident. If you choose to continue driving, you cannot pass through the intersection before the red light turns on, or even run through the red light, which may easily lead to a side collision accident. [0003] In order to deal with the amber light dilemma, extend the duration of the amber light signal, draw the yellow light stop warning line, install the yellow light stop warning sign, set the yellow light stop warning light, arrange the green light extension sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/08
CPCG08G1/08
Inventor 张亚平付川云郑柯张绪宏别一鸣孔维昊丁猛林嘉乐顾岩李重明
Owner HARBIN INST OF TECH