环形交叉口交织区通行能力的一个新理论模型

Theoretical Model of Roundabout Interweaving Area Capacity

为了对环形交叉口采取有效的控制与管理措施,必须提高环形交叉口通行能力计算方法的准确性。以排队论为基础,假设环道上无超车行为,环行车辆的车头时距服从泊松分布,车辆换道时间服从独立同分布,推导出了普遍适用的环形交叉口通行能力理论计算模型。通过仿真模拟验证了该模型的准确性,能更好的适应环形交叉口的规划设计以及我国实际交通状况。

In order to take effective control and management measures for roundabouts, it is important to improve the accurate calculation of the capacity at roundabouts. In case of the cars＂ arriving as a negative exponential distribution, no overtaking behavior on the lanes, and time for lane changing assumed to be independent and identically distributed across berths, this paper deduced the general model of the roundabout capacity. The accuracy of this model was verified by simulations. The proposed model is more equitable and more practical for the planning and design of roundabout and the actual traffic conditions as well.