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快速路路段类别事故率与交通流状态关系

, PP. 150-157

Keywords: 交通工程,事故率,分类划分,路段类别,交通密度,道路线形,分(合)流模式

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Abstract:

?选取基本段、合流段和分流段作为比较对象,对快速路不同路段类别的事故率与交通流状况的关系进行研究。采用临界速度区分饱和流和非饱和流,利用交通密度划分交通流水平,统计其事故率,并比较直、曲线形和分(合)流模式以及分(合)流点上(下)游区事故率分布差异。研究结果表明:对于非饱和流,事故率随交通密度呈现二次函数变化,其中合流段事故率显著大于分流段和基本段事故率;对于饱和流,事故率随交通密度呈现指数函数变化,但3种路段类别间事故率差异不显著,直、曲线形和分(合)流模式以及分(合)流点上(下)游区对事故率变化趋势有较大影响,其中在分流段的影响更为显著。

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