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Design method of the length of the left-turn U-turn from the stop line based on traffic wave theory

A design method and technology of stop lines, applied in roads, buildings, complex mathematical operations, etc., can solve problems such as unreasonable settings for left-turn turns, and achieve the effects of reducing impact, improving service levels, and avoiding diversion conflicts.

Active Publication Date: 2020-11-10
淮安市政设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a design method based on the traffic wave theory for the length of the left-turn U-turn from the stop line, by analyzing the traffic light signal cycle, using the traffic wave theory to calculate the maximum queuing length of the left-turn vehicles in the peak hours, and analyzing the left-turn The reasonable distance between the U-turn and the stop line solves the problem of unreasonable setting of the left-turn U-turn and reduces the impact of left-turn vehicles on left-turn vehicles in the same lane

Method used

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  • Design method of the length of the left-turn U-turn from the stop line based on traffic wave theory
  • Design method of the length of the left-turn U-turn from the stop line based on traffic wave theory
  • Design method of the length of the left-turn U-turn from the stop line based on traffic wave theory

Examples

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Effect test

Embodiment 1

[0047] A design method for the length of the left-turn U-turn lane to the stop line based on the traffic wave theory, including the following steps:

[0048] (1) Traffic data measurement:

[0049] 200 meters upstream of the intersection entrance road is the survey point of the normal driving speed of left-turning vehicles and the traffic volume during peak hours. Three vehicles start, record the average headway time when the vehicle reaches the stop line as the headway time when the vehicle starts.

[0050] First, survey the vehicle's vehicle speed at the vehicle speed survey point 200 meters upstream of the intersection, and record it; then, take 10 minutes as a time interval to continuously investigate the peak-hour traffic volume of large, medium and small vehicles passing through this point; Then, the headway survey point investigates the average headway and the vehicle speed when the vehicle passes the stop line in multiple cycles; finally, observe the signal light cycle...

Embodiment 2

[0072] Take the intersection of Chengde Road and Mingyuan Road in Huai'an City as an example. There is a left-turn lane in the north-south direction of the intersection, and there is no special U-turn lane. According to the literature, the length of the U-turn lane is generally 10 meters. The movement of vehicles is controlled by signal lights. The U-turn of the vehicle is easily affected by other vehicles and pedestrians.

[0073] A method for designing the length of a left-turn U-turn from a stop line based on traffic wave theory, comprising the following steps:

[0074] (1) Traffic data measurement:

[0075] 200 meters upstream of the intersection entrance road is the speed of left-turning vehicles and the survey point of traffic volume during peak hours. Before the intersection stop line is the survey point of headway distance of left-turning vehicles and the speed of vehicles passing through the stop line. Three vehicles start, and the average headway when the vehicle a...

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Abstract

The invention relates to a design method of length from a left turn U-turn intersection to a stop line based on a traffic wave theory. The design method comprises the following steps: acquiring related traffic flow data through a manual counting method, calculating the wave velocity of a concentrated wave at the intersection with intersection left turn traffic volume and left turn traffic densityby utilizing a traffic flow fluctuation theory, finding the maximum queue length of upstream left-turn vehicles according to the distance concentrated and swept by the concentrated wave at the upstream of the intersection and taking the length as the distance from a U-turn lane to the stop line. The design method of the length from the left turn U-turn intersection to the stop line based on the traffic wave theory, provided by the invention, has the benefits that the blank in the design aspect of the length from the left turn U-turn intersection in the U-turn inside the intersection to the stop line is made up, the influence of T-turn vehicles on the left turn vehicles is effectively reduced, the intersection congestion can be reduced, the diversion conflict between left turn U-turn and left turn on a same lane can be reduced as much as possible, the influence of pedestrians on a crosswalk on the left turn U-turn vehicles is reduced, the operation efficiency and the safety of the intersection are improved, and the intersection traffic capacity is improved.

Description

technical field [0001] The invention belongs to the technical field of road design in traffic engineering, and in particular relates to a design method for the length of a left-turn U-turn from a stop line based on traffic wave theory. Background technique [0002] With the development of society and economy, the number of automobiles in my country has shown explosive growth, followed by a rapid decline in the level of urban road services. Therefore, improving the road service level has become an urgent task in the current urban road infrastructure construction, and the optimal design of urban road intersections is the top priority. Limited by the land use problem of the city itself, it is impossible to expand the urban road construction land indefinitely, especially at the intersection of urban roads. Therefore, the design of the left-turn intersection has been valued by many traffic designers, and its purpose is to use the least funds and land to solve the problem. Vehicl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C1/00G06F17/18
CPCE01C1/00E01C1/002G06F17/18
Inventor 周君刘玥何林夏想
Owner 淮安市政设计研究院有限公司