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先入后出型城市快速路匝道组合的最佳间距

, PP. 109-114

Keywords: 交通工程,匝道最佳间距,统计建模,城市快速路,TSIS,交织区

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Abstract:

以上海市某先入后出型匝道组合为例,利用校验后的仿真软件TSIS研究了匝道间距与交织区平均速度的变化关系。结果表明,随着匝道间距的增加,交织区平均速度呈先增加后趋于稳定的趋势,且匝道间距对主线最外侧车道的影响程度远远高于对内侧车道的影响。借助统计软件SPSS分析了主线设计速度分别为60、80、100km/h时匝道间距、流量、汇入比、分流比与交织区平均速度的关系并建立了相应的定量模型。结果表明,主线设计速度不同时,影响交织区平均速度的因素也有所变化。根据定量模型分别计算了不同设计速度和交织区平均速度条件下的匝道间距,并根据实际情况对计算值进行了修正,最终给出了合理的推荐值,并与《城市快速路设计规程》(CJJ129—2009)中的推荐值进行了对比。结果表明,定量统计模型计算值较为合理,且更加详细,便于工程应用。

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