Determination method for minimum chamfer value of red lines of road intersection

A technology of plane intersection and determination method, applied in the directions of roads, roads, buildings, etc., can solve the problems of blank cut angle of red line and intersection scale, unable to meet the requirements of driver's sight distance, lack of demonstration process, etc. Resource utilization efficiency, good industry application prospects, and the effect of improving safety

CN104746397AInactive Publication Date: 2015-07-01SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-07-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a determination method for a minimum chamfer value of red lines of a road intersection. The determination method comprises the following steps: determining a right-angle vertex A of a sight distance triangle; calculating safe parking sight distances of a first straight movement motor vehicle lane which is closest to the central line on a right side transverse road, and a straight movement motor vehicle lane which is closest to the right side of a vertical road, and rounding up calculating results up to integers to obtain safe parking sight distances adopted values S1 and S2 of the two motor vehicle lanes; constructing the sight distance triangle; calculating the minimum chamfer value of a direction red line of the intersection; and taking the maximum value of the four directions as the minimum chamfer value of the whole intersection red line. According to the determination method, the minimum chamfer value of the red lines of the sight distance triangle is utilized for making up of the vacancy of a specific evaluation method of the red line chamfer by existing specifications; and the intersection occupied area can be reasonably planned under the condition of guaranteeing the safety, and the utilization efficiency of urban road land resources is improved.
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Description

technical field

[0001] The invention belongs to the field of road design in urban municipal and traffic planning, and particularly relates to a method of using a safe parking sight distance triangle model to perform unified processing and calculation of the minimum cut angle value of the red line of the intersection, so as to obtain different road level intersections that meet the requirements of motor vehicles. Calculation process and method of the minimum cut angle value of the intersection red line under the requirement of safe driving. Background technique

[0002] The red line planning of road sections and intersections is an important part of urban planning and road planning and design. The red line is the dividing line between urban road land and other land uses. The redline of the road intersects at the same time as the road intersects the road at the level intersection. On the road section, the road range is controlled by the road boundary line, which includes: the...

Examples

Embodiment Construction

[0031] Based on the investigation and acquisition of basic information such as grades of intersecting roads, cross-section composition, and design vehicle speed, the present invention establishes a calculation model for safe parking sight distance and sight distance triangle, and uses the model to determine the safety of road intersections with different red line widths. The size of the parking sight distance and the position of the apex of the sight distance triangle, and then use the hypotenuse of the right triangle to intercept the red line of the road level intersection, and use AutoCAD drawing software to solve the value of the cut angle of the red line, and finally get different road level intersections that satisfy the sight distance triangle Minimum redline chamfer required. The specific method includes the following steps:

[0032] Step 1. Investigate road infrastructure and traffic flow conditions such as grades of intersecting roads, composition of cross-sections, d...