信号交叉口直行车道饱和流率研究

为了提高城市信号交叉口车辆运行效率,本文分析了直行车道饱和流率的影响因素。基于长沙市典型信号控制交叉口直行车道在不同车道宽度、大车率和车道数情况下饱和车头时距的采集数据,分别建立了饱和流率与车道宽度、大车率、车道数的一元回归关系模型和饱和流率关于车道宽度、大车率和车道数的三元回归线性模型,最后并将拟合的模型放入南京典型信号控制交叉口的应用环境中。结果表明交叉口延误和饱和度值减少,进而说明所得到的模型具有一定的适用性。

Analysis of Saturation Flow Rate of the Through Lanes at Signalized Intersections

In order to improve operation efficiency of vehicles at a signalized intersection,this study focused on saturation flow rate of the through lanes at several typical intersections in Changsha city. Based on analysis of the collected data of various lane widths,cart rates,and lane numbers,some quantitative mathematical models between saturation flow rate and lane width,cart rate,as well as lane number were separately derived. At the same time,a mathematical regression model was established with the effects of lane width,cart rate,lane number being taken into consideration. Finally,the model has been applied to a typical intersection in Nanjing city,and the results showed that the delay and saturation value was reduced,so the model is feasible.