论文部分内容阅读
目前,我国国道108线总里程3272公里,其中一级路745公里,占23%;二级路1712公里,占52%,三级路419公里,占13%;四级路369公里,占11%。全线除四川省境内有75公里的砂石路面外,其余均为沥青或水泥路面,优良路率60%。国道205线总里程2904公里,其中一级路968公里,占33.3%,二级路1768公里,占61%,三级路167公里,占5.7%;另有1公里
At present, China’s national highway 108 lines total mileage of 3272 kilometers, of which 745 km of a road, accounting for 23%; two road 1712 km, accounting for 52%, 419 km three courses, accounting for 13%; 369 km Road, accounting for 11 %. In addition to the entire territory of Sichuan Province, 75 km of gravel pavement, the rest are asphalt or concrete pavement, the excellent road rate of 60%. The total length of National Highway 205 is 2904 km, of which 968 km is Grade I, 33.3% is Grade II, 1768 km is Grade II and 61% is Grade III 167 km, accounting for 5.7%; another one km