“蜀道难,难于上青天。”如今大西南的交通已经不再是古代伟大诗人李白所描述的景况了,但随着西部大开发进程的不断加快,这里的交通仍跟不上时代发展的步伐。伴随新世纪我国铁路建设新一轮高潮的迭起,一条沿大巴山麓、穿越川 “It is hard to go on a sailed path and difficult to ascend to the sky.” Today, traffic in the southwest is no longer the landscape described by the ancient great poet Li Bai. However, with the continuous acceleration of the process of developing the western region, traffic in this area still can not keep up with the development of the times pace. With the advent of a new round of climax in the railway construction in our country in the new century,