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Left-turn intersection guide line and left-turn stop line design method

A technology for left-turn intersections and design methods, which is applied to roads, roads, buildings, etc., and can solve problems such as reducing the safety of intersections, not considering the alignment requirements of guide lines at left-turn intersections, and conflicts between left-turning vehicles

Active Publication Date: 2021-02-19
JILIN UNIV
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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 problem that the existing method causes the left-turning vehicle to pass through ahead of the straight-going vehicle, which reduces the safety of the intersection, and does not take into account the linear requirements of the guide line of the left-turning intersection, and makes it easy for the left-turning vehicle to pass through with the straight vehicle. A design method for the guide line and left-turn stop line at the left-turn intersection is proposed to deal with the conflict between the waiting vehicles at the side entrance and the right-turn vehicles at the opposite entrance

Method used

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  • Left-turn intersection guide line and left-turn stop line design method
  • Left-turn intersection guide line and left-turn stop line design method
  • Left-turn intersection guide line and left-turn stop line design method

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specific Embodiment approach 1

[0025] Specific implementation mode one: the concrete process of a kind of left-turn intersection guiding line and left-turn stop line design method of this embodiment is:

[0026] Step 1. Determine the coordinate system and parameters of the intersection;

[0027] Step 2, determining the constraint conditions of the guide line at the left-turn intersection;

[0028] Step 3. Based on step 2, determine whether the guidance line of the left-turn intersection is obtained. If the guidance line of the left-turn intersection is obtained, draw the guidance line of the left-turn intersection on the basis of the position of the existing left-turn stop line; if the guidance line of the left-turn intersection cannot be obtained line, go to step 4;

[0029] Step 4: Make the guide line at the left-turn intersection follow the inner lane, change the position of the stop line, and regain the guide line at the left-turn intersection.

specific Embodiment approach 2

[0030] Specific embodiment two: what this embodiment is different from specific embodiment one is, determine intersection coordinate system and parameter in described step one; Concrete process is:

[0031] In order to facilitate the quantitative research, the Cartesian coordinate system of the intersection is established first. Such as figure 1 As shown, take the straight line where the entrance lane of left-turning vehicles and the opposite roadway is located as the x-axis, and take the straight line where the parking line of the left-turning lane of the entrance road is as the y-axis to establish a Cartesian coordinate system for the intersection, and the positive direction of the x-axis points to the The direction of the exit lane directly in front of the entrance lane of the left-turning vehicle, the positive direction of the y-axis points to the direction of the exit lane that the left-turning vehicle is about to enter;

[0032] The parameter is: w t 、w e , L e , L ...

specific Embodiment approach 3

[0043] Specific embodiment three: what this embodiment is different from specific embodiment one or two is, in described step 2, determine the constraint condition of left-turn crossing guiding line; Concrete process is:

[0044] According to the trajectory of the left-turn traffic flow in the intersection, the design of the guideline at the left-turn intersection should focus on the positions of three constraint points: the starting point of the turn caused by the location of the entrance road, the end point of the turn caused by the location of the exit road, Conflict limit points affected by through traffic flow. The coordinate values ​​of each constraint point are discussed separately below.

[0045] (1) Determine the coordinates of the steering starting point

[0046] The turning start point is the place where the left-turning vehicle turns at the intersection approach. Considering that the driver is driving on the left side of the vehicle, the left-turning intersection ...

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Abstract

The invention discloses a method for designing a left-turn intersection guide line and a left-turn stop line and relates to a method for designing a left-turn intersection guide line and a left-turn stop line. The method aims to solve problems that in an existing method, a left-turn vehicle collides with a straight-going vehicle in advance, intersection safety is reduced, the linear requirement ofa left-turn intersection guide line is not considered, and the left-turn vehicle collides with a waiting vehicle on a lateral entrance lane and a right-turn vehicle on an opposite entrance lane easily. The method comprises the following steps of 1, determining an intersection coordinate system and parameters; 2, constraint conditions of a left-turn intersection guide line being determined; 3, judging whether a left-turn intersection guide line is obtained or not, and if so, drawing the left-turn intersection guide line on the basis of the position of the existing left-turn stop line; if not,executing the step 4; and 4, the left-turn intersection wire being connected with the inner lane in sequence, the position of the stop line being changed, and the left-turn intersection guide line being obtained again. The method is applied to the field of urban road intersection channelization.

Description

technical field [0001] The invention relates to the channelization technology of urban road intersections, in particular to the design method of guide lines and left-turn stop lines at left-turn intersections. Background technique [0002] At the left-turn permission phase intersection, the through-going traffic flow should have the right of way, but the phenomenon of rushing through the left-turning traffic flow occurs frequently, and the leading vehicle turning left will choose the shortest path as close to the entrance road as possible, making potential conflict points more serious. Get close to yourself to ensure that you can pass through the intersection before the through traffic, and then guide a left-turning caravan to pass through the intersection, causing a large delay to the oncoming straight traffic. [0003] According to the "Code for the Setting of Urban Road Traffic Signs and Markings" (GB51038-2015), when the level intersection has a large area, the traffic o...

Claims

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Application Information

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IPC IPC(8): E01C1/00E01C1/02G08G1/01
CPCE01C1/002E01C1/02G08G1/01
Inventor 白乔文宋现敏陶楚青闫红日
Owner JILIN UNIV
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