快速路出口至前方灯控路口合理距离研究

Reasonable Distance Between the Exit of Urban Expressway and Signalized Intersection

应用Vissim微观仿真模型研究城市快速路菱形立交出口至前方灯控平交路口合理距离,分析了出口下游辅路交织区在不同交通量组合情况下交织长度的变化规律,并以排队长度为评价指标研究由于平交口信号灯造成各转向车辆的延误,研究表明:出口到平面交叉口停车线的合理距离决定于交叉口各转向车辆最大排队长度、交织长度及辅路附加车道长度。在流量组合1下,取值215 m;在流量组合2下,取值305 m;在流量组合3下,应加大出口与平交口之间距离,并采取相应的交通组织管理措施来保证出口下游辅路车辆的正常运行。

Micro-simulation software Vissim is utilized to analyze the reasonable distance between the exit and the anterior signalized intersection on the urban expressway,and the varying laws of weaving length of the side road＇s weaving section of the exit＇s downstream in the case of different traffic combinations.The queuing length is adopted as an evaluating index to study the different directional vehicles＇ delay attributing to the intersection signals.The outcome indicates that the reasonable distance is 215m in the case of the 1st traffic flow combination;the value is 305m in the case of the 2nd traffic flow combination.In the case of the 3rd traffic combination,the distance between the exit and signalized intersection should be augmented,and some traffic management measures should be taken to guarantee the vehicle＇s normal operation.