城市环形交叉口通行能力理论模型

为了对城市环形交叉口采取有效的控制与管理措施,必须对城市环形交叉口的通行能力做出准确的计算。通过对城市环形交叉口道路和交通特征进行分析,以间隙-接受理论为基础,利用概率分析方法,假设环道上车流车头时距服从Erlang分布的情况,推导出了普遍适用的城市环形交叉口通行能力的理论模型。通过实际的交通测试结果验证了该模型的准确性,而且证实该模型能够较好地反映实际道路和交通条件变化对通行能力的影响。

Theory model of circular intersection traffic capacity in urban

In order to take effective control and management measures to circular intersection in urban,the accurate calculation of the traffic capacity at circular intersection in urban is necessary.This paper analyzed the road and traffic characteristic of urban circular intersection with the gap-acceptance theory and probability method.In case of the head time of the circular intersection obeying the Erlang distribution,this paper deduced the general model of the urban circular intersection capacity.The accuracy of this model was verified by real traffic test result,and the effects of the road and traffic properties on the capacity of urban circular intersection were discussed.The new model is more equitable and more practical for planning and designing the circular intersection.1 tab,10 refs.