宜宾与云南、贵州接壤，属山岭重丘地区。这里雨量偏多。地厂水位高，而巨气候、土壤、水文、地质等条件都十分复杂，给公路的建、养、管带来了极大的困难。宜宾铁路少，航道短，公路是全区交通的主要支柱。总段管养的470km国省道及干线公路大多标准低、质量差，究天不足；加之 Yibin and Yunnan, Guizhou border, is a mountainous area. There is a lot of rain here. The water level of the factory is high, and the conditions of the giant climate, soil, hydrology and geology are all very complicated, which brings great difficulties to the construction, maintenance and management of the highway. Yibin less rail, waterway short, the highway is the main pillar of the region’s traffic. General section of custody of the 470km provincial highway and most of the main highways and low standard, poor quality, lack of days; combined with