基于效率-安全评价的近距离错位交叉口信控优化  

An Optimization of a Signal Control Scheme for Close Stagger Intersections based on Evaluations of Efficiency and Safety

作　　者：罗慧敏 郑亮[1] LUO Huimin ;ZHENG Liang(School of Traffic and Transportation Engineering,Central South University,Changsha 410075,China)

机构地区：[1]中南大学交通运输工程学院,长沙410075

出　　处：《交通信息与安全》2018年第1期65-73,共9页Journal of Transport Information and Safety

基　　金：国家自然科学基金项目(71501191);中国博士后科学基金项目(2014M552165;2015T80889);湖南省科技厅重点研发项目(2015ZK3004)资助

摘　　要：在城市中2个近距离错位交叉口之间的交织路段,来自不同方向的车流相互干扰严重,尤其是在交织长度限制下的连续换道操作,对交通效率和安全水平造成不良影响。因此,基于效率-安全综合考虑,研究了一种安全协调信号控制方案。即在上游交叉口的支路处设置右转信号灯,将交织路段内主、次路的车流冲突点进行时间和空间上的分离,并对近距离错位交叉口进行系统的相位和配时优化设计,从而达到降低车辆运行延误、提高行车安全性的目的。以福州市浦上大道-金州南路-金港路交叉口为例,运用Vissim微观仿真软件和SSAM替代安全评价模型,从效率-安全2个方面综合比较安全协调信控方案与信控现状、单点优化方案的优劣。实验结果表明,相对于信控现状,单点优化方案和安全协调信控方案的效率-安全水平分别提升了36.17%和57.17%,验证了安全协调信控方案的优越性。此外,通过Vissim调整2个交叉口之间的距离,比较安全协调信控方案和单点优化方案相对于信控现状的效率-安全综合优化程度。研究表明,近距离错位交叉口的间距越小,安全协调信控方案的优越性越明显。In urban road systems,vehicles from different directions interfere greatly with each other in weaving sections between two close stagger intersections.Especially,drivers′continuous lane change operations within limited weaving length have negatively influences on traffic efficiency and safety.Therefore,a coordinated signal control scheme for safety is developed based on comprehensive consideration of efficiency and safety.A signal light for right-turning vehicles is set up in a minor road of an upstream intersection to separate the conflicts from space-time,and systematically optimizing phrases and timing for close stagger intersections,in order to reduce vehicle delays and improve safety level.Then,intersections of Pushang Road-Jinzhou South Road-Jingang Road in Fuzhou are taken as a case study.Using Vissim and SSAM,the proposed scheme is compared with the current scheme,and another isolated optimization scheme in the respect of efficiency and safety.The results show that compared with current scheme,the efficiency and safety level of the isolated optimization scheme and the proposed scheme improved by 36.17%and 57.17%,respectively,which verifies the superiority of the proposed scheme.In addition,by adjusting distance between two intersections in Vissim,a similar comparison has been developed,and the results show that the shorter of the distance of close stagger intersections is,the bigger of the superiority of the proposed scheme.

关 键 词：交通规划与管理 近距离错位交叉口 信控优化 VISSIM SSAM 

分 类 号：U491[交通运输工程—交通运输规划与管理]