【摘要】 为减少高海拔地区一级公路长直线路段因汽车超速行驶引发的交通事故,提出高海拔地区长直线路段合理限速值,以提高高海拔地区公路长直线路段汽车运行安全,在高海拔地区不同海拔区间长直线路段进行汽车运行速度样本测试试验,采用雷达测速枪采集高海拔地区不同海拔区间(3 000～3 500 m,3 500～4 000 m,4 000～4 500 m,4 500～5 000 m)一级公路长直线路段汽车运行速度样本,利用SPSS软件对高海拔地区长直线路段不同海拔区间运行速度样本进行统计处理,分别绘制了不同海拔区间运行速度累计频率曲线,计算得到不同海拔区间长直线路段运行速度V85,分别为:98 km/h (3 000～3 500 m),91 km/h (3 500～4 000 m),88 km/h (4 000～4 500 m),和84 km/h(4 500～5 000 m),建立了运行速度V85与海拔之间的关系模型。结果显示:高海拔地区长直线路段运行速度V85随着海拔的升高呈现降低的趋势,基于运行速度提出了高海拔地区一级公路长直线路段限速值为80 km/h,限速值的提出将为高海拔地区一级公路长直线路段限速和设置相应交通安全设施提供理论依据,以期减少高海拔地区因汽车超速行驶引发的交通事故。更多还原

【Abstract】 To reduce the traffic accidents caused by vehicle overspeed and to propose the reasonable speed limit value in long straight sections of first class highway in high-altitude area,and to improve the traffic safety in long straight sections of highway in high-altitude area,the vehicle operating speed sample test in long straight sections in high-altitude area within different altitude intervals is conducted. The vehicle operating speed samples in long straight sections of first class highway within different altitude intervals( 3 000-3 500,3 500-4 000,4 000-4 500,4 500-5 000 m) are collected by radar speed measuring gun,which are statistically processed by SPSS software,and the cumulative frequency curve of operating speed within different altitude intervals are plotted,the values of operating speed V85 in long straight sections within different altitude intervals,i. e.,98 km/h( 3 000-3 500 m),91 km/h( 3 500-4 000 m),88 km/h( 4 000-4 500 m),and 84 km/h( 4 500-5 000 m),are calculated,and the model ofrelationship between operating speed V85 and altitude is built. The result shows that the operating speed V85 in long straight sections of highway within different altitude intervals tends to decrease with the increase of altitude,it is proposed that to take 80 km/h as the speed limit of long straight section of first class highway in high-altitude area based on operating speed. The speed limitation provides theoretical basis for the appropriate speed limit and setting traffic safety facilities in long straight sections within different altitude intervals,so as to reduce traffic accidents caused by overspeed in high-altitude area.更多还原