山区高速公路长大下坡问题探讨

Discussion on Downhill of Expressway at Mountainous Area

山区高速公路相对于平原高速最大的区别就是限制因素比较多,平曲线半径比较小、纵坡比较大,其中长大下坡问题对行车安全带来了隐患。以大广公路承德至赤峰段高速公路(以下简称"承赤高速公路")为例,对其中存在的一处长大下坡问题进行探讨。

The largest differences between the expressway at the mountainous area and that in the plain region are more limiting factors, smaller horizontal radius, and larger longitudinal slope, among which the downhill of the expressway brings hidden danger into traffic safety. Taking the section of Chengde to Chifeng of Daguang Expressway （ hereinafter referred to as ＂ Chengchi Expressway＂ ） as an example, the downhill of the xpressway is discussed.