老城区五岔异形交叉口交通优化设计

Traffic Optimization Design at Special Intersection with Five Bifurcations in Old City

新老城区交界路口往往易形成交通瓶颈。现以唐山市路北区龙华东道与河西路形成的五岔异形交叉口为例,结合交通现状,分析该路口产生交通拥堵的原因。通过优化信号配时并进行路口渠化,提出2套设计方案,并运用Vissim仿真软件对2套方案进行分析评价。研究结果显示,东进口改为单行后,该交叉路口的车辆饱和度与停车延误均有改善,验证了该方案有效性,并为该类型路口提供设计思路。

The junction of old and new town is often easy to form traffic bottle neck.Taking the special-intersection with five bifurcations at the intersection of Longhua East Road and Hexi Road in Lubei District of Tangshan City as an example,the causes of traffic congestion were analyzed at the intersection combined with the traffic situation.Two sets of design schemes were proposed by the optimization of signal timing and the canalization at the special intersection,and then the two schemes were analyzed and evaluated by using Vissim simulation software.The simulation results show that both vehicle saturability and parking delay at the intersection are improved after changing the east entrance to be a single lane.The validity of the scheme is verified,and it provides a new design idea for such intersections.