１．公路交通在我国西部大开发和陕西公路建设中的地位和作用 西部地区包括 １０个省市，总面积 ５４０万 ｋｍ２，占全国的 ５６．８％，人口 ２．８６亿，占全国对２３．１％。截止至 １９９８年底，公路通车里程为３８万多 ｋｍ，公路密度为 ７ｋｍ／ １００ｋｍ２，通乡、? 1. The status and role of highway traffic in the development of western China and Shaanxi highway construction The western region includes 10 provinces and cities with a total area of ​​540 million km2, accounting for 56.8% of the country with a population of 286 million, accounting for 23.1% %. As of the end of 1998, the mileage of roads opened to traffic was more than 380,000km and the density of roads was 7km / 100km2.