信号交叉口饱和流率和启动延误的影响分析  

Analysis of Saturation Flow Rate and Delay at Signalized Intersection

作　　者：杨晓光[1] 庄斌[1] 李克平[1] 

机构地区：[1]同济大学交通运输工程学院,上海200092

出　　处：《同济大学学报（自然科学版）》2006年第6期738-743,共6页Journal of Tongji University:Natural Science

基　　金：高等学校博士学科点专项科研基金资助项目(20020247036);国家自然科学基金资助项目(70122201/G0114)

摘　　要：针对我国城市中典型的信号控制交叉口,从实地调查的角度出发,在现有的道路几何条件和交通条件下,对信号交叉口不同车道宽度时的直行车道饱和车头时距进行现场测定.通过编写计算机程序对数据分析处理,给出饱和车头时距的分布、初始时距分布、饱和流率估算值及其单个周期内的启动延误估计;深入考虑了车道宽度对初始时距、饱和时距、饱和流率及启动延误的影响,给出了车道宽度与饱和时距、饱和流率的关系模型,并对模型中给出的结论与美国的HCM 2000(道路通行能力手册)中的结论作了进一步的比较分析.This study aimed to accurately quantify the effects of lane width on signalized intersection capacity by videotaping several typical intersections in China. Based on an analysis of the collected data of various lane widths by computer, the distribution of initial headway, saturation headway and a simple formula to estimate the start-up lost time in each cycle were obtained, and the quantitative mathematical modal between lane width and saturation headway as well as saturation flow rate was derived. Finally, a comparison of our methods to Highway Capacity Manual 2000 methods indicated that the recommended methods were more suitable for the present situation in China.

关 键 词：信号交叉口 车道宽度 饱和流率 启动延误 

分 类 号：U491[交通运输工程—交通运输规划与管理]