[1]王京元,王炜.保护相位下左转车道存储段长度计算[J].东南大学学报(自然科学版),2010,40(4):852-859.[doi:10.3969/j.issn.1001-0505.2010.04.036]
 Wang Jingyuan,Wang Wei.Calculation of storage lengths for left-turn lanes with protected phases[J].Journal of Southeast University (Natural Science Edition),2010,40(4):852-859.[doi:10.3969/j.issn.1001-0505.2010.04.036]
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保护相位下左转车道存储段长度计算()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第4期
页码:
852-859
栏目:
交通运输工程
出版日期:
2010-07-20

文章信息/Info

Title:
Calculation of storage lengths for left-turn lanes with protected phases
作者:
王京元1 王炜2
1 深圳大学土木工程学院,深圳 518060; 2 东南大学交通学院,南京 210096
Author(s):
Wang Jingyuan1 Wang Wei2
1 College of Civil Engineering, Shenzhen University, Shenzhen 518060, China
2 School of Transportation, Southeast University, Nanjing 210096, China
关键词:
信号交叉口 保护相位 左转车道 存储段长度
Keywords:
signalized intersection protected phase left-turn lane storage length
分类号:
U491.54;U491
DOI:
10.3969/j.issn.1001-0505.2010.04.036
摘要:
以左转交通量、周期长度、左转绿灯时间为变量,运用排队论和概率论,从满足左转排队车辆停放需求的角度,对信号交叉口进口道设置为左转保护相位且仅有1条左转专用车道时的左转车道存储段长度展开研究.基于M/M/1排队系统,建立了保护相位下单条左转车道存储段长度计算的理论模型.在此基础上,讨论了模型的适用条件和实用性,分析了存储段长度随饱和度、左转交通量的变化规律,综合考虑空间几何条件、服务质量、经济性能,指出排队车辆数不宜超过20辆,当置信概率为95%时,实用饱和度区间为[0,0.8].讨论了置信概率、设计交通量及单位车辆停放长度等参数的取值方法.对典型情况计算、分析,提出极限交通量和极限排队长度、临界交通量和临界排队长度2组便于工程应用的概念,并绘制图表.制定了应用图表确定存储段长度的流程.该研究为交叉口采用左转保护相位且进口道仅设置1条左转车道的存储段长度确定提供了依据,修订后,也可以用于直行及右转车流排队长度和车道长度的计算.
Abstract:
Storage lengths of left-turn lane for signalized intersection approach with protected phase and only one left-turn lane were studied using queuing theory and probability theory. The storage length of this study focused on meeting the requirements of left-turn vehicles queuing. The main variables are left-turn volumes, cycle lengths and left-turn green time. A theoretical modal for calculating storage lengths for single left-turn lane with protected phase was established based on M/M/1 queuing system. The applicable and practical conditions are discussed. The variations of storage length with degree of saturation and left-turn volumes are analyzed. On this basis, the thresholds of queue length and degree of saturation etc. are proposed with overall consideration of geometric conditions, service quality and economic performance. It is indicated that the number of queuing vehicles can not be more than 20, and the practical saturation interval is [0, 0.8] for a 95% probability. Methods of determining values for three key parameters are discussed. They are the confidence probability, the design traffic volume and the queuing headway. Calculations and analyses were done for general conditions. Two sets of concepts are proposed in order to facilitate engineering application, which include limit traffic volume and limit queue length, critical traffic volume and critical queue length. The results are charted and the processes of determining the storage length are developed applying these charts. This study presents calculation guidelines for single left-turn lane with protected phase at signalized intersections approach, and can also be used to calculate the lengths of through and right-turn lane and queue after a little modification.

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备注/Memo

备注/Memo:
作者简介: 王京元(1977—), 男, 博士, 副教授, wangjingyuan-01@sina.com.
基金项目: 国家自然科学基金资助项目(50908150, 50738001)、广东省自然科学基金资助项目(9451806001002319).
引文格式: 王京元,王炜.保护相位下左转车道存储段长度计算[J].东南大学学报:自然科学版,2010,40(4):852-859. [doi:10.3969/j.issn.1001-0505.2010.04.036]
更新日期/Last Update: 2010-07-20