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本文通过对北京市各类型无信号交叉口的大量实地调查发现,北京市无信号交叉口具有通行权相等的特征。本文研究了影响此类等权交叉口通行能力的主要因素,并根据交叉口实际运行情况,提出了新的无信号交叉口通行能力定义。在此基础上本文建立了“非冲突最大流”通行能力计算模型,本模型认为无信号交叉口具有车辆交替通过的特征。通过一些实例计算,应用本模型计算出通行能力的理论值与实际最大通行流量的平均误差为7.8%。
Based on a large number of field surveys of various types of no-signal intersections in Beijing, this paper finds that Beijing no-signal intersections have the same right of way. In this paper, we study the main factors that affect the capacity of this kind of right-of-way intersections and propose a new definition of traffic-capacity based on the actual operation of intersections. On this basis, this paper establishes a calculation model of “non-conflict maximum flow” traffic capacity. This model considers the no-signal intersection has the characteristics that vehicles pass alternately. By some examples, the average error between the theoretical value of traffic capacity and the actual maximum traffic flow calculated by this model is 7.8%.