Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (2): 448-456.doi: 10.13229/j.cnki.jdxbgxb20210639

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Design of bus priority signal considering flexible lane setting

Jin LI1(),Yu-tong SUN1,Xiao-zhong WEI2,Yu-ling JIAO1()   

  1. 1.College of Transportation，Jilin University，Changchun 130022，China
    2.Transportation Bureau of Ganzhou City，Ganzhou 341008，China
  • Received:2021-07-08 Online:2023-02-01 Published:2023-02-28
  • Contact: Yu-ling JIAO E-mail:li_jin@jlu.edu.cn;jyling777@163.com

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Abstract:

By considering the flexible lane setting， the vehicle and pedestrian delay analysis is carried out for the bus priority intersection with left-turn phase， combined with the pre-signal system. The design is adopted at an intersection to analyze the arrival and departure process of vehicles at the main signal and pre-signal， and calculate the delay changes of buses， straight social vehicles and left-turn vehicles before and after flexible lane setting. The results show that after a flexible lane setting is adopted at an entrance of a bus priority intersection with a left-turn phase， when the intersection is saturated， the bus delay is significantly reduced. The delay of left-turn vehicles and the total delay of straight vehicles are both reduced.

Key words: transportation engineering, flexible lane, public transport priority, vehicle delay

CLC Number: 

  • U491

Fig.1

Layout of entrance road at intersection without "flexible lane setting""

Fig.2

Layout of entrance road at intersection with "flexible lane setting ""

Fig.3

Coordinate relationship of main signals and pre-signal"

Fig.4

Curve of through vehicles arriving and leaving at main signals"

Fig.5

Curve of through vehicles arriving and leaving at pre-signals"

Fig.6

Curve of left-turning vehicles arriving and leaving at main signals"

Fig.7

Curve of left-turning vehicles arriving and leaving at pre-signals"

Fig.8

Arrival and departure curves of through vehicles at intersections without "flexible lane setting""

Fig.9

Arrival and departure curves of left-turn vehicles at intersections without "flexible lane setting""

Table 1

Signal timing parameters"

参数数值参数数值
Rm/s35gT/s65
GT/s45gL/s45
GL/s40t1/s2
rp/s10t2/s27

Table 2

Traffic delay before and after the adoption of "flexible lane setting""

延误对象柔性车道设置前柔性车道设置后延误减少减少比例/%
车总延误/ （s?pcu）公交车辆482.4348.0134.427.9
直行社会车辆1929.61920.09.60.5
左转车辆768.6723.6425.9
所有车辆3180.62991.61895.9
人总延误/ （s?人）公交车辆1447210440403227.9
直行社会车辆3859.2384019.20.5
所有直行车辆18331.2142804051.222.1

Table 3

Simulation results of traffic delay before and after "flexible lane setting""

延误对象延误/s
“柔性车道设置”前公交车辆458.3
直行社会车辆1813.8
左转车辆737.9
所有车辆3021.6
“柔性车道设置”后公交车辆330.6
直行社会车辆1804.8
左转车辆694.7
所有车辆2842.1
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