摘要
现有环形立体交叉口普遍存在车流量大、交织段短的问题。以2层式环形立体交叉为例,通过交通冲突特性分析,提出了一种简易式两相位信号控制方案,将立体环交简化为一般平面交叉口,利用Webster法计算信号配时参数,并对全红时间的计算提出了要求。讨论了该方案适用的道路几何条件。以乌鲁木齐北站转盘为例,使用Vissim软件进行模拟仿真并评价,通过对比优化前后的交通运行状况,说明信号控制方案具有一定的改善作用。
Heavy traffic and short weaving section length are common problems of rotary interchange.Taking two-level roundabout as an example,a simple two-phase signal control method is put forward through analyzing traffic conflict and calculating signal timing parameters based on Webster including requirement for the length of red intervals.The applicable road geometry of signal control method is also discussed.Finally Vissim simulation and evaluation are carried out on Urumqi's Northern Station.Through comparing traffic operation before and after the optimization,the results show that the simple signal control method has a positive influence on rotary interchange traffic.
出处
《交通科技》
2016年第5期161-163,共3页
Transportation Science & Technology
关键词
交通管理
环形立体交叉口
信号配时
全红时间
仿真评价
traffic management
rotary interchange
signal timing plan
red interval
simulation and evaluation
