铁道科学与工程学报2017，Vol.14Issue(4)：852-861,10.
山区高速公路桥隧密集路段交通流特性研究
Research on traffic flow characteristics of bridge and tunnel intensive section in mountainous expressway
摘要
Abstract
To study the traffic flow characteristics of bridge and tunnel intensive section in mountainous expressway, the traffic environment characteristics of bridge and tunnel intensive section were analyzed based on five aspects of light-dark adaptation in tunnels, environment illumination, noise, air quality and the vehicle operational characteristics. Experimental scheme of radar positioning and velocity measurement was made to research from two aspects of speed and headway, combined with the traffic surveillance video data. Speed and headway distribution characteristics of bridge and tunnel intensive section in mountainous expressway were obtained through the use of chart analysis and comprehensive comparison analysis. Researches show that the 85th percentile speed is between 90-98 km/h while the 15th percentile speed is between 45-67 km/h of the section with dense bridges and tunnels; Also, the 85th percentile speed reaches the maximum at the bridge and the joint section, while it reduces to the minimum at the entrance of the long tunnel; more than 50% of the headway is in 0-10 s, while 85% of the headway is approximately below 25 s; the mean of headway is minimum at the entrance of the long tunnel, while it reaches the maximum at the middle position of the long tunnel.关键词
交通工程/山区高速公路/桥隧密集路段/交通流特性/速度/车头时距Key words
traffic engineering/mountainous expressway/bridge and tunnel intensive section/traffic flow characteristics/speed/headway分类
交通工程引用本文复制引用
倪娜,潘兵宏,王垒..山区高速公路桥隧密集路段交通流特性研究[J].铁道科学与工程学报,2017,14(4):852-861,10.基金项目
中央高校基本科研业务费专项资金资助项目(310821165006) （310821165006）
中国博士后科学基金资助项目(2014M552397) （2014M552397）
