摘要
使用Metrocount和GPS采集了8条山区高速公路的平曲线运行速度数据并进行分析,提出以小车运行速度差作为判定准则确定是否设置建议限速标志;选择平曲线半径和入曲线前的运行速度为自变量,建立线性模型预测小车运行速度差。研究结果表明:通过运行速度和设计速度的综合确定建议限速值,当平曲线半径小于300 m的时候,运行速度差大于15 km/h,在高速公路平曲线上设置建议限速标志;根据驾驶人的视认特性,计算出不同运行速度下对应的建议限速标志前置距离。
Advisory speed signs are rarely used in China and Chinese researchers are seldom focused on this issue before.Traffic safety records are distinct different for curves section and tangent sections.Advisory speed limit signs setting for curve sections of mountain freeway is studied.Speed information from 8 provinces are collected by GPS terminal and Metrocount for one year.Speed difference concept is figured out and speed differential threshold is determined by linear model.Speed difference is bound to exceed 15 km/h when horizontal curve radius is small than 300 meters.The value of advisory speed sign is determined when considering traffic safety and flow speed.Human identification process toward traffic signs was analyzed.The location of advisory speed sign is determined considering drivers visual characteristics and operating speed.4 tabs,4 figs,12 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第4期77-80,93,共5页
Journal of Chang’an University(Natural Science Edition)
基金
国家西部交通建设科技项目(20073182233301)
关键词
交通工程
建议限速
运行速度差
视认性
前置距离
traffic engineering
advisory speed sign
speed difference
visibility
advanced distance
