一、西部地区交通基础设施现状(一)交通基础设施总体规模相对不足。据统计,到2013年底,西部地区公路通车里程达163万公里,占全国公路通车总里程的37.4%,且一半左右在二级标准以下;内河航道里程约3.2万公里,占全国内河航道总里程的25.5%;铁路网密 First, the status quo of traffic infrastructure in the western region (A) the overall size of transport infrastructure is relatively inadequate. According to statistics, by the end of 2013, the mileage of highway opened to the west reached 1.63 million kilometers, accounting for 37.4% of the total mileage of the national highway and about half of them are below the second standard. The mileage of inland waterways is about 32,000 kilometers, accounting for the total mileage of inland waterways in China Of the 25.5%; railway network density