保证夜间停车视距的公路平、竖曲线半径

夜间的交通事故率及其危害性都远高于白天,一个重要原因是夜间停车视距不足。为了满足夜间汽车停车视距的需要,保障行车安全,根据汽车前灯散射角、高度和仰角,计算出满足汽车夜间停车视距的相关参数,结果表明：满足汽车夜间停车视距的最小平、竖曲线半径均大于《公路路线设计规范》要求的极限最小半径,某些情况下甚至大于《公路路线设计规范》要求的一般最小半径。就此提出的解决方案,可供公路设计时参考。

Radius of Highway Horizontal Curve and Vertical Curve Ensuring Night Stopping Sight Distance

The traffic accident rate and its harm in nighttime is more than those in daytime, one important reason is the shortage of night stopping sight distance. For the needs of night stopping sight distance, ensuring the driving safety, based on the car headlight of scatter angle, height and elevation, it works out the relating parameters meeting stopping sight distance demand. The results show that the radius that can meet the night stopping sight distance needs are larger than the specifieation＇s limited minimum radius, sometimes even larger than the common minimum radius. It can provide the reference of highway design.