公路停车视距相关问题探讨  

Discussion on Related Problems of Highway Stopping Sight Distance

作　　者：苟栋元 龚腾飞 代诗宇 GOU Dongyuan;GONG Tengfei;DAI Shiyu(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;National Engineering&Research Center for Highways in Mountain Area,Chongqing 400067)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]国家山区公路工程技术研究中心,重庆400067

出　　处：《公路交通技术》2024年第6期183-189,共7页Technology of Highway and Transport

摘　　要：停车视距作为公路最重要的安全性指标之一,对保证车辆行车安全与运行效率有着至关重要的作用。为合理确定公路停车视距,降低公路建设成本,针对公路停车视距传统计算模型参数取值进行了讨论,分析结果认为,现行规范停车视距值有较大富余空间;同时针对现行规范的不足,引入了汽车制动减速度的理论,计算了舒适制动、舒适紧急制动和紧急制动3种工况下的停车视距值。结果表明:舒适制动工况下的值与我国现行规范基本一致,而紧急制动工况(a=4.5 m/s^(2),t=1.5 s)下的值较现行规范小得多,该值建议作为停车视距最小值使用,可满足复杂路段安全行驶和降低工程造价的需要。As one of the most important safety indicators on highways,stopping sight distance plays a crucial role in ensuring vehicle safety and operational efficiency.In order to reasonably determine the stopping sight distance of highways and reduce the construction cost of highways,this paper discusses the parameter values of traditional calculation models for stopping sight distance of highways.The analysis results show that there is a large surplus space in the current standard stopping sight distance values.At the same time,in response to the shortcomings of current regulations,the theory of vehicle braking deceleration was introduced,and the stopping sight distance values were calculated for three working conditions:comfortable braking,comfortable emergency braking,and emergency braking.The results show that the values under comfortable braking conditions are basically consistent with the current regulations in China,while the values under emergency braking conditions(a=4.5 m/s^(2),t=1.5 s)are much smaller than the current regulations.This value is recommended to be used as the minimum stopping sight distance,which can meet the needs of safe driving on complex road sections and reduce engineering costs.

关 键 词：停车视距 纵向摩阻力系数 制动减速度 运行速度 行驶速度 

分 类 号：U412.3[交通运输工程—道路与铁道工程]