基于混合车流的公路无控交叉口行车延误模型

为了预测公路无信号控制交叉口次要车流的平均延误时间，建立了由多种车型构成的混合交通流的行车延误模型．在对无信号控制交叉口车辆延误的形成过程进行系统分析的基础上，以可接受间隙理论为基础，采用概率分析方法，对由多种车型组成的混合车流特性进行了分析，在无控交叉口主路车流车头时距服从二阶Erlang分布条件下，建立了支路多车型混合车流的行车延误模型．通过与实际观测的支路行车延误对比分析，模型计算结果与观测的延误值接近，表明该模型较为符合公路无信号控制交叉口的实际情况．

Traffic Delay Model at Unsignalized Intersection With Mixed Vehicle Flows

In order to predict minor stream average delay at an unsignalized intersection,a waiting delay model of mixed traffic flow composed of representative types of vehicles is set up.The process of traffic delay at unsignalized intersection was analyzed from systematic viewpoint.Then the characteristic of mixed vehicle flows was addressed with probability method based on the gap acceptance theory.When the flow at major lane of unsignalized intersection follows two-class Erlang distribution,the traffic delay mode...