一种新的无信号交叉口次要车流平均延误模型

 提出了无信号交叉口在主路具有2股车流且其车头时距均服从M3分布时次要车流的平均延误模型.次要道路车辆以泊松过程到达且在主路车辆具有绝对优先权下通过交叉口.推出了2股主路车流车头时距的联合概率密度函数.次要道路车辆在等待通过时形成M/G/1排队系统.根据排队理论得到该延误模型.所采用的方法可用到主路车流多于2条的无信号交叉口.

A new model for prediction of minor stream average delay at an unsignalized intersection

It is presented the development of a model for predicting average minor stream delay at an unsignalized intersection which major road has two lanes,each of which has stream whose headway distributions are Cowan's M3 distributions.It is assumed that the minor stream cross major stream under absolute priority gap acceptance theory.Minor stream is assumed to arrive at a Poisson process.Joint probability density function of headway for major lanes was derived.The queue in the minor street was characterized as an M/G/1 queue.A new model was developed using queue theory.The method is applicable to intersections with more than two lanes at its major road with little adjustment.