环形交叉口多车型混合车流的通行能力模型

Capacity Model of Roundabouts with Multi-vehicle-type Mixed Traffic Flow

已有的环形交叉口通行能力模型是假设车流为单一车型车流,而实际运行的车流多为混合车流,因而建立多车型混合车流的通行能力模型是十分必要的。本文运用间隙接受理论,通过概率分析方法,考虑环形交叉口多种混合车型条件下的通行能力,从而建立了环形交叉口的通行能力模型,并且通过迭代得出环形交叉口混合车流条件下总的通行能力,发展了混合车流通行能力理论。通过与已有模型的通行能力和观测通行能力的对比分析可知,该模型的理论通行能力与观测通行能力更加吻合,并为环形交叉口通行能力计算提供了理论依据。

It is important to set up roundabout capacity model with multi-vehicle-type mixed traffic flow, because the current models are based on the assumption that the traffic flow is built up by one-vehicle-type, while in fact it is multi-vehicle-type. The authors, based on gap acceptance theory, analyzed the capacity of the roundabout with multi-vehicle-type mixed traffic flow with probability theory, set up the capacity model of the roundabout with multi-vehicle-type mixed traffic flow and the whole capacity, developed the multi-vehicle-type capacity theory and the criterion for roundabout capacity.