西南交通大学学报2017，Vol.52Issue(2)：334-339,6.DOI:10.3969/j.issn.0258-2724.2017.02.017
基于通行效率最优的交叉口调头选位
Location of U-Turn Openings at Signalized Intersections Based on Optimal Traffic Capacity
摘要
Abstract
In order to solve the unreasonable deployment of U-turn openings at signalized intersections,a method is proposed to calculate locations of optimal U-turn openings based on the optimal traffic capacity by taking the traditional four-phase control intersection as an object.Firstly,a loss time model of lanes shared by left-turn and U-turn vehicles is built to reveal the interaction mechanism between left-turn and U-turn traffic flows in different traffic conditions.Then,a capacity calculation model of lanes shared by left-turn and U-turn vehicles is established using the probability distribution function of vehicles in different flow directions.The capacity-location (C-L) curve drawn by the model can fully reveal the capacity characteristics of the shared lanes under influence of the Uturn openings.Based on the maximum capacity,the optimal location of U-turn openings is finally determined.In addition,the validity of the method was verified through a case study in the central area of Zibo City.The result shows that the proposed method can improve the traffic capacity of the shared lane of left-turn and U-turn vehicles from 432 to 509 pcu/h by 17.82％.关键词
信号交叉口/通行能力/调头口/最佳位置Key words
signalized intersection/traffic capacity/U-turn openings/optimal location分类
交通工程引用本文复制引用
孙锋,孙立,李庆印,孙绍伟..基于通行效率最优的交叉口调头选位[J].西南交通大学学报,2017,52(2):334-339,6.基金项目
国家自然科学基金资助项目(51508315,61573009) （51508315,61573009）
山东省重点研发计划资助项目(2016GGB01539) （2016GGB01539）
