山区低等级公路弯道行车速度对行车轨迹的影响  

The impact of driving speed on driving track on low-grade highways in mountain area

作　　者：于海[1] 张兰芳[1] 李迪[1] 

机构地区：[1]同济大学 道路与交通工程教育部重点实验室,上海201804

出　　处：《交通科学与工程》2012年第4期59-64,共6页Journal of Transport Science and Engineering

基　　金：四川省地方公路典型路面推广应用示范研究

摘　　要：将驾驶模拟器应用于交通仿真中.在具有不同道路线形组合的弯道上,对小客车进行了行驶试验.针对山区低等级公路小半径曲线的特点,分析了行车速度的变化趋势以及与行驶轨迹的关系.对于小半径曲线而言,车辆在进入曲线时速度降低,轨迹发生内向偏移;而车辆在驶出曲线时速度提高,轨迹发生外向偏移.进一步地考虑曲线路段车辆受力特征及驾驶人驾驶行为,分析了行车速度与行车轨迹侧向偏移的相关性,得到了基于车速的行车轨迹侧向偏移计算模型,计算结果可为山区公路线形设计提供参考依据.The driving simulator is applied to the traffic simulation in different combina- tions of road lines in the curves. According to the features of the road in mountain area with small radius curve, the change tendency of the driving speed and the relationship between the driving speed and the driving track are analyzed. The simulation results show that when a vehicle enters a curve,its path has a tendency to shift inward the curve and its speed is rapidly reduced, while its path tends to shift outward the curve and its speed is improved as it exits the curve. Furthermore, considering the state of vehicles and drivers＇driving behaviours, this paper analyzes the correlation between the driving speed and lateral migration of the driving track, and the calculation model of the driving track lateral migration based on driving speed, the calculation results provide a reference for mountain area road alignment design.

关 键 词：行车速度 车辆行驶轨迹 平面线形 交通安全 

分 类 号：U412[交通运输工程—道路与铁道工程] U491