摘要
为探究左弯待转区对信号交叉口车辆排放的影响,以左弯待转区长度和左转短车道长度为重要参数、以相位有效绿灯时间为决策变量,建立最小化车辆延误和交通排放的孤立交叉口信号配时优化模型。以大连市五一路/西南路交叉口为例,参考现状方案通过调整相位相序、增设左弯待转区、增设左转短车道获得5种优化方案。结果显示,在优化配时方案的前提下,能使车辆延误和排放减少的有效因素从高到低依次为增设左转短车道、调整相位相序、增设左弯待转区;对于相同的相位相序和渠化方案,只增设左弯待转区使车辆排放最少增加0.7%、停车次数最少增长14.8%、车均延误最少上升2.1%。研究表明,增设左转短车道比增设左弯待转区能更有效地减少延误和排放。
To study effects of left-turn waiting areas on vehicle emissions at signalized intersections,an optimization model is developed for signal timings at an isolated intersection.In this model,lengths of left-turn waiting areas and short left-turn lanes are important parameters,effective green time for all phases are decision variables.The minimization of vehicle delay and traffic emissions is regarded as objective functions.Take the intersection of Wuyi Road and Xinan Road in Dalian city as a case study,five optimization scenarios are obtained by adjusting phase sequence,adding left-turn waiting areas or short left-turn lanes based on actual traffic conditions.The results show that under a condition of optimizing signal timing,effective factors which can reduce vehicle delay and emissions are sorted from high to low:addition of short left-turn lanes,adjustment of phase sequence.Under a condition of same signal timing,when only adding left-turn waiting area,the results are vehicle emission increases by 0.7%,number of stops increases by 14.8%,and average delay increases by 2.1%.It shows that in order to reduce delay and emissions,the addition of a short left-turn lane is more effective than the addition of a left-turn waiting area.
作者
姚荣涵
许向辉
张文松
郑刘杰
郭伟伟
YAO Ronghan;XU Xianghui;ZHANG Wensong;Zheng Liujie;Guo Weiwei(School of Transportation and Logistics,Dalian University of Technology,Dalian 116024,Liaoning,China;Beijing Key Laboratory of Urban hitelligent Traffic Control TechnologynNorth China University of Technology,Beijing 100144,China)
出处
《交通信息与安全》
CSCD
北大核心
2018年第5期49-58,共10页
Journal of Transport Information and Safety
基金
国家自然科学基金项目(51578111)资助
关键词
交通工程
信号交叉口
左弯待转区
左转短车道
车辆排放
信号配时
traffic engineering
signalized intersections
left-turn waiting areas
short left-turn lanes
vehicle emission
signal timing
