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影响交织区服务水平的主要因素包括交通流量、交织流量比、自由流速度、交织区长度、交织区内车道数和交织构型等。选取西安绕城高速公路吕小寨立交-朱宏路立交之间交织区为调查对象,开展道路条件和交通流运行状况调查。运用调查数据对美国道路通行能力手册(HCM2010)交织区交织速度和非交织速度预测模型进行修正,重新标定相关参数。基于该速度预测修正模型,利用Visual Basic语言开发交织区运行分析计算工具,定量分析影响因素对交织区通行能力和服务水平的敏感性。
The main factors that affect the service level of the weaving zone include traffic flow, interlaced flow ratio, free-flow velocity, interlaced zone length, number of lanes in the interlaced zone and interlaced configuration. The interlacing area between Lvxiaozhai overpass and Zhuhonglu overpass of Xi’an Ring Expressway was selected as the survey object to carry out the survey on the condition of road and traffic flow. The survey data was used to revise the predictive model for the interleaving speed and non-interleaving speed in the Road Capacity Manual (HCM2010) of the United States to re-calibrate the relevant parameters. Based on this model, the Visual Basic language is used to develop the analysis tools of the interleaving zone to quantitatively analyze the sensitivity of influencing factors to the capacity and service level of the weaving zone.