摘要
以可接受间隙理论为基础,并假设车头时距服从Cowan M3分布,利用概率的方法,对环岛进入通行能力的理论公式进行了数学推导,并对通行能力公式中的各个参数作了详尽的分析,得出了其中最主要的影响因素。根据实际不是所有进口道车辆均须穿越环岛中所有车道进入环岛的事实,引入新的参数改进了通行能力的计算公式。
Based on the gap acceptance theory and Cowan M3 distribution, this paper gives a mathematical derivation of the roundabout entry capacity formula. Parameters in the formula are analyzed with respect to their impacts on the entry capacity, and those major influencing elements are ＇obtained consequently. In consideration of the fact that not all the entry vehicles have the necessity to cross all the lanes in a roundabout in order to get into it, new parameters are introduced in the capacity formula to ameliorate its consistency with the real entry behavior.
出处
《公路工程》
2007年第4期169-173,共5页
Highway Engineering
