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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,由具有全国政治、经济、国防意义的现有干线公路连接而成,共70条,总长达10.9万公里。在这些“国道”中,由首都向外放射的12条,长2.34万公里,其代号第一个字采用
Our country’s highway, 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. National Highway Network to take radiation and network layout, by the national political, economic and national defense of existing trunk roads connected, a total of 70, a total length of 109000 kilometers. In these “national roads”, 12 of the 12 radiations emitted by the capital have a total length of 23,400 km, and the first word of the code