【摘要】 介绍了一种新的计算饱和流率和相位损失时间的累计曲线法。与韦伯斯特方法相比,该方法可以计算前损失时间和后损失时间,弥补了韦氏方法的不足。实际应用结果表明,在无干扰或干扰很小的情况下,一条车道的饱和流率在1600～1900veh/h之间,总损失时间在1～2s之间,有的相位损失时间可以忽略不计;饱和流率的计算值与通常假设的1700～1800veh/h基本相符,但实际测得的损失时间却低于HCM推荐的3～5s,也低于黄灯时间。更多还原

【Abstract】 Compared with Webster method, cumulative curve method can measure starting time and ending time. As an example, this method was applied in several lanes in Changchun city. The applying results show that the saturation flow rate of one lane is between 1600~1900 veh/h, and the total lost time is less than 2 s without disturbing. The saturation flow rate approximates the assumptive value, 1700~1800 veh/h, but the lost time is less than what HCM commends, 3~5 s, which is also less than the yellow time,3 s. 4 tabs, 4 figs, 8 refs.更多还原