Correction method of bicycle influencing turning vehicle saturation flow rate at signal crossing

A technology for bicycles and intersections, applied in the field of traffic control, can solve the problems of not considering the characteristics of bicycles at signalized intersections, and not being suitable

Inactive Publication Date: 2009-01-07
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, foreign research results are not suitable for a large number of bicycle traffic in my country.
At present, domestic research is mostly based on the research method of HCM2000 on bicycles, which is to analyze the interfere...

Method used

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  • Correction method of bicycle influencing turning vehicle saturation flow rate at signal crossing
  • Correction method of bicycle influencing turning vehicle saturation flow rate at signal crossing
  • Correction method of bicycle influencing turning vehicle saturation flow rate at signal crossing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] During the evening rush hour at Pingleyuan intersection in Chaoyang District, Beijing, the intersection is controlled by four phases, and there are left-turn protection phases in the north and south, so there is no need to consider the conflict between left-turning motor vehicles and opposite straight-going bicycles. There is a dedicated right-turning lane at the north entrance, and the calculation Influence coefficient of bicycle on right turn saturation flow rate. Using the method of video to collect video data of motor vehicle flow and bicycle flow, the traffic parameters of the intersection are obtained with the help of simi software as follows:

[0147] North entrance

[0148] East-west green light time G = 42 seconds

[0149] Time t of motor vehicles turning right Rf = 2.0 seconds

[0150] Acceptable gap t for motor vehicles turning right R0 = 3.5 seconds

[0151] The length of the conflict zone between bicycles and right-turning motor vehicles l = 5.6 meters...

Embodiment 2

[0163] During the evening rush hour at the intersection of Hongqi Street and Yuhua Road in Shijiazhuang, the intersection is controlled by two-phase signals, and there are two dedicated left-turn lanes at the west entrance. The influence coefficient of bicycles on the left-turn saturation flow rate at the west entrance is calculated. Using the method of video to collect video data of motor vehicle flow and bicycle flow, the traffic parameters of the intersection are obtained with the help of simi software as follows:

[0164] West entrance

[0165] East-west green light time G = 40 seconds

[0166] Time t of motor vehicles turning left Lf = 2.5 seconds

[0167] Acceptable clearance t for motor vehicles turning left L0 = 4.0 seconds

[0168] Opposite straight motor vehicle flow = 681 vehicles / hour

[0169] Opposite bicycle flow = 546 vehicles / hour

[0170] The average time of the first stage of the bicycle t = 15 seconds

[0171] The average length of the bicycle group i...

Embodiment 3

[0184] During the evening rush hour at Wusheng intersection in Chaoyang District, Beijing, the intersection is controlled by two-phase signals. The south entrance has two lanes. The left lane is a straight-left mixed lane, and the right lane is a straight-right mixed lane. Influence coefficient of saturated flow rate of turning motor vehicle and left turning motor vehicle. Using the method of video to collect video data of motor vehicle flow and bicycle flow, the traffic parameters of the intersection are obtained with the help of simi software as follows:

[0185] South entrance

[0186] Green light time in the north-south direction = 35 seconds

[0187] Lane group flow = 891 vehicles / hour

[0188] Proportion of right-turning motor vehicles in the lane group = 0.121

[0189] Proportion of motor vehicles turning left in the lane group = 0.709

[0190] Time t of motor vehicles turning right Rf = 2.0 seconds

[0191] Acceptable gap t for motor vehicles turning right R0 = ...

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Abstract

The invention discloses a correction method of bicycle impact on saturation volume rate of turning motor vehicles at a signalized intersection, which can be applied to calculating timing of signal control at the intersection. The correction method divides a conflict between bicycles and turning motor vehicles into two phases by studying different states of bicycles which cross the intersection and defines a conflict area; in the first stage, the gathered waiting bicycles during the red light period cross the intersection in the manner of bicycle groups with high density and low freedom, and the conflict is analyzed based on time occupation ratio of the conflict area by bicycles; in the second stage, bicycles arriving randomly at the intersection in a random manner with low density and high freedom, and the conflict is analyzed based on a crosscutting gap theory, and an influence coefficient of the bicycles on the saturation volume rate of turning motor vehicles is calculated. By applying the timing at intersection calculated by adopting the correction method of the bicycle impact on saturation volume rate of turning motor vehicles at a signalized intersection to the practice, the conflict between motor vehicles and non-motorized vehicles at the intersection can be relieved, traffic capacity of the intersection can be improved, and delay of motor vehicles at the intersection can be reduced.

Description

technical field [0001] The invention relates to a method for correcting the influence of bicycles on the saturation flow rate of turning vehicles at signalized intersections, which can be used to calculate the timing of signal control at intersections and belongs to the field of traffic control. Background technique [0002] China is a big country of bicycles. Mixed traffic is a basic feature of Chinese traffic. For a long time, mixed traffic at intersections has been a major difficulty in urban traffic management in my country, and it is easy to cause chaos at intersections, causing traffic accidents, non-motor vehicles and Traffic conflicts between motor vehicles are also often an important factor reducing the capacity of intersections. The impact of bicycles on turning vehicles at intersections is mainly reflected in the saturation flow rate of turning vehicles, and the accuracy of the saturation flow rate of motor vehicles at intersections will directly affect the efficie...

Claims

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Application Information

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IPC IPC(8): G08G1/01
Inventor 于泉过雁鸣赵晓华荣建
Owner BEIJING UNIV OF TECH
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