城市无信号控制T型交叉口通行能力计算方法

以当量人群描述非机动车和行人对机动车通行的共同影响，对城市无信号控制T型交叉口的交通流运行优先等级进行重新划分，共划分为5 级.将主路直行车流和横穿支路的当量人群流作为独立优先流，应用间隙接受理论，研究了各次级交通流的可能通行能力计算方法.考虑高等级次级交通流及横穿主路的当量人群流的影响，采用概率论方法研究了各次级交通流的可能通行能力修正系数，从而得到各次级交通流的实际通行能力计算模型，进而得到整个无信号控制T型交叉口的通行能力计算方法.结果表明，以当量人群描述非机动车和行人对机动车通行的共同影响计算过程简单，符合我国城市道路交叉口非机动车和行人多的实际情况.

Capacity Calculation Method of Urban Road Unsignalized T-intersections

Taking the joint influence of non- motorized vehicles and pedestrians on motor vehicles into account, the priority of traffic flows is divided into 5 ranks. Let major- road through traffic flows and equivalent people groups crossing the minor road be independent priority streams, this paper studies the potential capacity of each minor stream by gap acceptance theory. Considering the effects of higher- rank minor- stream vehicles and equivalent people groups crossing the major road on lower- rank minor- stream vehicles, the paper studies the potential- capacity adjustment factors of each minor stream applying probability theory, and the movement capacity of each minor stream is obtained. So the capacity calculation method of urban road unsignalized T- intersections is acquired. The results indicate that analyzing the joint influence of non- motorized vehicles and pedestrians on motor vehicles by equivalent people groups can simplify the capacity calculation process, and the capacity calculation results is also accord with the running conditions of T-intersections with more non-motorized vehicles and pedestrians.