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城市快速路匝道合流区汇入车辆折算系数研究

DOI: 10.3969/j.issn.1674-0696.2015.01.21, PP. 95-99

Keywords: 交通工程,城市快速路,匝道合流区,车辆折算系数,临界间隙,通行能力,trafficengineering,urbanexpressway,rampmergingarea,vehicleconversioncoefficients,marginalgap,trafficcapacity

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Abstract:

:?讨论了城市快速路匝道合流区汇入车辆的车辆折算系数(PCE)计算的理论和方法。基于上海市快速路实测数据,从匝道车辆汇入主线的过程分析出发,考虑各类车型车身长度、车辆性能和主线外侧车道车头时距分布等因素对车辆汇入主线的影响,根据间隙接受理论和不同主线流量下各类车型的匝道汇入能力,建立了匝道合流区汇入车辆折算系数模型,并给出了在充分加速汇入和停车汇入两种汇入模式下PCE的建议值。研究表明:PCE值与汇入模式和主线外侧车道流量有很大关系,其与主线外侧车道流量呈正相关性,在同等主线外侧车道流量下,充分加速模式较停车汇入模式的PCE值小;在计算匝道合流区通行能力时不应对汇入车辆的PCE简单的取一定值。

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