城市信号交叉口掉头车道右置安全性能分析  

Safety Analysis of Right-Located U-Turn Lane at Urban Signalized Intersection

作　　者：刘骏[1] 郭唐仪[1] 刘英舜[1] 舒垚 

机构地区：[1]南京理工大学自动化学院,南京210094

出　　处：《交通信息与安全》2015年第1期90-94,共5页Journal of Transport Information and Safety

基　　金：国家自然科学基金青年基金资助项目(51208261);教育部人文社会科学青年基金资助项目(12YCZH062);中央高校基本科研业务费专项资金资助项目(30920140132033)资助

摘　　要：为探索城市信号交叉口掉头车道右置的可行性,分析交叉口的整体状况,从交叉口几何形状、交通构成和信号配时三方面对交叉口适应性进行分析;从安全层面对交叉口运用交通冲突技术进行安全性分析。结合某一T形交叉口,利用Vissim软件进行交通运行仿真模拟,将得到的轨迹导入至SSAM软件进行冲突分析。采用交通冲突类型、冲突数目、冲突空间分布等指标,对比分析了常规车道设置和掉头车道右置2种交通渠化下的冲突特性。研究表明,城市主次道路相交信号交叉口,将掉头车道右置可显著减少交叉冲突、追尾冲突、变道冲突数目,增加冲突时间(TTC),提升交叉口尤其是掉头车流安全性。To explore the feasibility of setting U-turn lane on the right most lane,This paper analyzes the intersection from three aspects：the shape of the intersection,traffic composition,and signal timing.The paper then evaluate the traffic safety of the intersection based on traffic conflict technique.Using a signalized T intersection as an example,a VISSIM simulation model is developed to simulate the traffic operation at the T intersection.The VISSIM trajectory file is exported into SSAM for the traffic conflict analysis.The conflict characteristics of conventional lane arrangement and the right-located U-turn lane arrangement are compared using the number of conflicts,type of conflicts,and the spatial distribution of conflicts.The results show that,at an intersection where a major road intersects with a minor one,locating the U-turn lane at the most right lane can reduce the number of cross-conflicts,rear end-conflicts,and lane change conflicts,and increases the time to collision（TTC）.Thus,the safety performance of U-turn flow is improved by this innovative lane arrangement.

关 键 词：交通安全 掉头车道右置 冲突分析 SSAM 

分 类 号：U491.3[交通运输工程—交通运输规划与管理]