摘要
本文在分析主路为单车道情况的基础上,通过定义间隔余隙,建立了主要道路为双车道及多车道情况时,无信号交叉口支路车辆穿插通行能力的新的分析模式,并推出了其一般公式。公式考虑了各车道任意的临界间隔分布和任意的跟车时距分布,其一般性保证了各种主路交通特性和支路车辆的行为特性能在模型中得到真实反映,因而结果是符合实际的。本模式还适用于高速公路合流,信号交叉口车辆左转等问题的分析研究。
Based on analyzing the case that the major stream has one lane,this paper proposes a new exactly analytical model for evaluating the minor stream capa- city in a unsignalized priority intersection by defining 'Gap--remainder' while the major stream has two lanes or N lanes,and derives more general formulae. The model allows for arbitrary critical gap distribution in each lane and for a general move-up time distribution. The general form of the distributions en- sures that various traffic and driver behavior characteristics fed into the mo- del are realistic and hence so are the results. The model also fits such problems as freeway merging, vehicle left turning in a signalized intirsection and so on.
关键词
交叉口
通行能力
间隔余隙
道路
priority intersection
capacity
gap-remainder
critical gap
gap distribution
