山区高速公路桥隧密集路段交通流特性研究
发布时间：2018-02-24 19:28
本文关键词： 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 出处：《铁道科学与工程学报》2017年04期 论文类型：期刊论文
【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。
[Abstract]:In order to study the traffic flow characteristics of dense sections of highway in mountainous area, the traffic environmental characteristics of dense sections of bridges and tunnels are analyzed from five aspects: tunnel adaptation, environmental illumination, environmental noise, air quality and vehicle driving characteristics. In this paper, the experimental scheme of radar positioning and velocity measurement is worked out. Combined with the traffic surveillance video data of dense sections of bridge and tunnel, two aspects of speed and head-length are studied separately, and the methods of chart analysis and comprehensive contrast analysis are used. The characteristics of speed and headway time distribution of dense section of highway in mountainous area are obtained. The results show that the speed of 85% position in the dense section of bridge and tunnel is between 90 ~ 98 km/h and 15% of the vehicle speed is in the range of 4567 km/h; At the junction of the bridge and the bridge, the speed of 85% is the highest, and at the entrance of the long tunnel, the lowest speed is more than 50% or more than 50% of the headway, and the headway of the long tunnel entrance is the smallest, with the headway distance of 85% or less within 10 seconds, and the average length of the front distance at the entrance of the long tunnel is the smallest. In the middle of the long tunnel, the average time distance of the vehicle front is the largest.
【作者单位】： 长安大学公路学院;特殊地区公路工程教育部重点实验室;林同h旯使こ套裳，
本文编号：1531429
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