无信号T型交叉口次要道路通行能力分析

以可接受间隙理论为基础,利用概率分析法,对由大型车、中型车和小型车组成的混合车流进行分析,并考虑了主路和支路冲突车流的相互影响。在无信号T型交叉口主路车流车头时距服从改进后的M3分布的条件下,建立了支路3种车型混合车流的通行能力模型。并通过计算机模拟,分析了主路交通量、主路左转车比例以及可接受间隙对支路通行能力的影响。

Analysis Traffic Capacity at Unsignalized T-intersections

Based on the gap acceptance theory, the mixed traffic flow was analyzed by the probability method,and the major lane and minor lane's conflict streams of traffic interactions were considered. When the flow of the major lane of unsignalized T-intersection follows improved M3 distribution, the traffic capacity model of mixed flow at minor lane was developed. This paper uses the model to analyse, through the computer simulation, the major lane volume of traffic, the proportion of the major lane turning to the left and the influence of the gap acceptance to the minor lane traffic capacity.