降雨气象条件下城市道路信号交叉口饱和流率研究  

Study on Saturation Flow Rate of Urban Road Signal Intersection Under Rainfall Meteorological Conditions

作　　者：潘杰 高勇 黄家淙 Pan Jie;Gao Yong;Huang Jiazong

机构地区：[1]南京市城市与交通规划设计研究院股份有限公司 [2]华录易云科技有限公司 [3]扬州职业大学

出　　处：《交通与港航》2021年第1期66-73,共8页Communication & Shipping

摘　　要：该文以采集的信号交叉口实测车头时距数据为基础,首先采取应用Wilcoxon符号秩检验的方法检验比较了西安市不同降雨强度下城市路段饱和流率的差异性,给出不同降雨强度下的车头时距分布情况。结果表明,饱和流率随着降雨强度的增大而逐渐降低。与无雨情况相比,分别降低了12.41%、19.12%、27.79%O然后分析了降雨条件下水膜厚度与摩擦系数、气象能见度和能见距离之间的关系,分别给出了不同降雨条件下路面摩擦系数和能见度值。建立降雨天气下的饱和流率模型,考虑天气影响因子和摩擦系数以及能见度之间的关系,应用回归方法最终得到天气影响因子和摩擦系数、能见度的模型,最终得到模型的拟合优度为88.2%。Based on the collected data of actual time headway,this paper uses Wilcoxon signed・rank method to test and compare the saturation flow rate of urban road sections under different rainfall intensity in Xi'an city,and the distribution of time headway under different rainfall intensity is given.The results show that the saturation flow rate decreases with the increase of rainfall intensity.Compared with the condition without rain,it decreases by 12.41%,19.12%and 27.79%,respectively.Then the relationship between the water film thickness and the friction coefficient,meteorological visibility and visibility distance under different rainfall conditions is analyzed,and the friction coefficient and visibility are given.A saturation flow rate model is established in rainy weather.Considering the relationship between weather influence factor,friction coefficient and visibility,the regression method is used to obtain the model of weather influence factor,friction coefficient and visibility,and the final fitness of the model is 88.2%.

关 键 词：饱和流率 降雨天气 实时交通控制 数理统计 交通仿真 

分 类 号：U491.23[交通运输工程—交通运输规划与管理]