It is reported national large-scale planned highway network has covered the highways at each province and region, which is that based on the current common national highways and planned expressways, the network on national main highways will be expanded to improve its service ability. Qinghai will expand or update the recent five national highways(G109, G214, G215, G227 and G315) and make the number of national highways increase to 17 with 10,640kms long. The six national expressways include: Radioactive Line G6(Beijing to Lasa), Horizontal line G3011(Liuyuan to Golmud), New Line 5(Zhangye to Daluo), Longitudinal Line 6(Xining to Panzhihua), Contact Line 26(He’nan to Maxin) and Contact Line 28(Xining to Delingha).