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国道108线山区路段的功能分类与全国其他干线公路山区路段情况近似,国道108线山区路段的特点,总体来讲为道路等级低、路面比较窄,线形比较差,转弯半径比较小,长大纵坡比较多,沿线地质灾害频发,造成山区公路的行车安全隐患比较多,容易发生交通阻塞与事故。山区公路由于地理区域的一些特点,技术等级不尽相同,在路网中的功能地位也不尽相
The functional classification of the national highway No.108 mountainous section is similar to that of the other mountainous sections of the country’s main highway. The characteristic of the national highway No.108 mountainous section is generally low road grade, narrow road surface, poor linear shape, small turning radius, More slopes, along with frequent geological disasters, resulting in traffic safety hazards in mountainous areas are more prone to traffic congestion and accidents. Due to some characteristics of the geographical area, mountainous roads have different technical levels and have different functions in the road network