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国道及其编号我国的公路，采取分级管理的办法。按行政区划，可分为国道、省道、县道、乡道和专用公路五级。１９８１年经国务院批准，正式使用国家干线公路网，简称国道网。国道网采取放射与网络相结合的布局，共７０条，总长达１０．９万公里。其中，由首都向外放射的有...
National Road and its number of roads in our country, to take a hierarchical management approach. By administrative divisions, can be divided into State Road, Provincial Road, County Road, Country Road and five special roads. Approved by the State Council in 1981, the official use of the national trunk highway network, referred to as the national highway network. State Road network to take a combination of radiation and the layout of the network, a total of 70, a total length of 109,000 km. Among them, the capital from the external radiation ...