基于饱和度的车道数量确定方法

文章从理论上推导了交通需求与道路宽度、有效通行时间比的相对关系，进而推导出一个流向上的车道数量的计算公式，并针对典型的十字交叉口和路段情况，详细讨论了交叉口进出口道和路段上车道数量计算公式。最后，对一个算例进行了验证和总结。

Method to Determine the Number of Lanes Based on Saturation Degree

The paper theoretically deduces the relative relationship of the volume, the required effective passage time ratio, and the required road width of a traffic movement. Then, it establishes the model of the number of the lanes in a flow direction, and gives the formulae of the number of the approach lanes, the number of the exit lanes of the typical right-angle intersection, and the lane number of road sections. Finally, the paper validates the model by an example.