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运用实证调研和行为分析方法,通过对北京和上海的典型路段进行观测,研究道路的车道数与平均每车道通行能力的关系,结果表明在不受干扰的快速路基本路段上,道路的平均每车道通行能力随车道数的增加而边际递减。进一步基于驾驶员的驾驶行为分析得出,车辆换道行为的增加及其导致的车辆间相互干扰的增大是造成通行能力递减的主要原因。这一研究表明以后的道路规划设计中不能忽略车道数对平均每车道通行能力的影响,对完善道路通行能力手册的编制,道路网络的规划设计有着重要的理论意义和实践指导作用。
By means of empirical research and behavioral analysis, this paper investigates the relationship between the number of lanes in a road and the average capacity per lane by observing the typical sections in Beijing and Shanghai. The results show that the average road per lane Lane capacity decreases with increasing lanes. Further analysis based on the driver’s driving behavior shows that the increase of vehicle lane changing behavior and the increase of mutual interference between vehicles are the main reasons causing the decreasing of traffic capacity. This study shows that the future of road planning and design can not ignore the number of lanes on the average capacity per lane impact on the improvement of road capacity manual preparation, road network planning and design has important theoretical significance and practical guidance.