【摘要】 高速公路夜间的交通事故率和死亡率均高于白天。对长松高速公路实验路段按照平曲线半径和纵坡值进行分类,通过实地行车实验,得到不同行驶速度下白天和夜间驾驶员对交通标志的识别距离数据。结果表明,驾驶员的昼夜识别距离随着行驶速度的增加而降低,曲线路段夜间对驾驶员的识别距离影响较白天显著,在曲线路段不同行驶速度下的夜间识别距离均小于白天。研究结果可以为我国高速公路交通管理部门制定夜间车速限制标准提供理论参考。更多还原

【Abstract】 The traffic accident rate and death rate on expressway in nighttime are higher than that in daytime.The paper classifies the test sections of Changchun-Songyuan Expressway according to the radius of horizontal curve and grade of longitudinal slope.Through field tests,the traffic sign identification distance of drivers under different speed in daytime and nighttime are obtained.The result indicates that driver′s ident-ification distance is reduced with the increasing of travel speed both in nighttime and daytime;the influence on driver′s identification distance in nighttime is more obvious than that in daytime at curve sections;the identification distance under different vehicle speed at curve sections in nighttime is less than that in daytime.The research fruit can provide theoretical reference to the constituting of speed limit standard in nighttime for the expressway traffic management departments.更多还原