双车道公路附加车道设置参数研究

摘要

In order to provide gist for design and construction of auxiliary lane on two-lane highway, its setting length, width and longitudinal grade were studied.Based on traffic simulation data, the relationship model was established among the length of auxiliary lane's section with uniform width, traffic volume, and driving speed.According to analysis on design capacity of two-lane highway under different design speed and terrain, suggestion values of the length of auxiliary lane's section with uniform width were given two-lane highway with different design speed and terrain.Based on analysis on automobile's driving safety, calculation formula was presented for the wide of auxiliary lane on two-lane highway.According to statistic results of questionnaire survey on drivers' selected lateral vehicle space, suggestion values of the width of auxiliary width were given for two-lane highway with different design speed.According to force analysis of vehicle on up-grade slope, the simplified relational formula was put forward between slope length and longitudinal grade.Suggestion values of the maximum longitudinal grade of auxiliary width were given for two-lane highway with different design speed and altitude.%为了给双车道公路附加车道设计与施工提供参考依据,开展了双车道公路附加车道设置长度、宽度及纵坡度研究.基于交通仿真数据,构建了双车道公路附加车道等宽段长度与交通量、行驶车速的关系模型,结合不同设计速度与地形条件下双车道公路设计通行能力分析,计算给出了对应不同设计速度与地形条件的双车道公路附加车道等宽段长度建议值.基于车辆行驶安全性分析,提出了双车道公路附加车道宽度的计算公式,根据驾驶人侧向车间距选择问卷调查统计结果,计算给出了对应不同设计速度的双车道公路附加车道宽度建议值.基于汽车上坡行驶时的受力分析,给出了坡长与纵坡度的简化关系式,并计算给出了对应不同设计速度与海拔高度的双车道公路附加车道最大纵坡度建议值.