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

作　　者：倪娜[1] 潘兵宏[1,2] 王垒 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]特殊地区公路工程教育部重点实验室,陕西西安710064 [3]林同棪国际工程咨询(中国)有限公司,重庆401121

出　　处：《铁道科学与工程学报》2017年第4期852-861,共10页Journal of Railway Science and Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(310821165006);中国博士后科学基金资助项目(2014M552397)

摘　　要：为了研究山区高速公路桥隧密集路段的交通流特性,从隧道明暗适应、环境照度、环境噪声、空气质量及车辆行驶特性5个方面分析桥隧密集路段的交通环境特点,制定雷达定位测速实验方案,结合桥隧密集路段的交通监控视频资料,从速度和车头时距2个方面分别进行研究。采用图表分析法和综合对比分析方法,得到山区高速公路桥隧密集路段的速度和车头时距分布特征。研究结果表明:桥隧密集路段的85%位车速均在90~98 km/h之间,15%位车速均在45~67 km/h之间;桥梁与桥梁连接处的85%位车速最高,长隧道入口处的85%位车速最低;50%以上车头时距在0~10 s以内,85%的车头时距大约在25 s以下;长隧道入口处的车头时距均值最小,长隧道中间位置处的车头时距均值最大。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 85 th percentile speed is between 90-98 km/h while the 15 th percentile speed is between 45-67 km/h of the section with dense bridges and tunnels; Also, the 85 th 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 

分 类 号：U412.366[交通运输工程—道路与铁道工程]