衰减系数法在环形交叉口通行能力计算中的应用

Application of attenuation coefficient method for traffic capacity calculation of roundabouts

为了方便快捷准确地计算环形交叉口通行能力,引入衰减系数法对环形交叉口通行能力进行了研究.通过利用衰减系数法对一个四路交叉的环形交叉口实例进行计算和分析,得到了该交叉口通行能力和交织段通行能力.研究结果表明,衰减系数法即可以克服沃尔卓普公式计算环形交叉口交织段通行能力时受诸多约束参数的缺陷,又可以准确计算整个环形交叉口的通行能力.

In order to fast and accurately calculate the traffic capacity of roundabouts, the traffic capacity of roundabout is studied with the attenuation coefficient method. Capacity of the intersection and the weaving section were obtained, by calculating and analyzing a fourleg roundabout example. Research results show that the attenuation coefficient method can overcome the defect that War-drop formula has many binding parameters when using it to calculate the capacity of weaving section, and can accurately calculate the capacity of roundabout.