我国第一条国道主干线京沪高速公路日前实现全线贯通。至此,京沈、京沪、沪杭甬以及与之相连的沈阳至长春至吉林市间高速公路组成,贯通我国东北、华北和华东,长达2500ｋｍ的东部高速公路大通道正式形成。京沪高速公司是国道主干线“两纵两横三个重要路段”七条路中全线贯通的一 The first national highway in China Beijing-Shanghai Expressway has been completed across the board. At this point, the Beijing-Shenyang, Beijing-Shanghai, Shanghai-Hangzhou-Ningbo and its associated Shenyang-Changchun-Jilin expressway are formed. The east expressway with a total length of 2500km has been formed in northeast, north and east China. Beijing-Shanghai Expressway is a national highway “two vertical and two horizontal cross-section of three important sections,” seven roads in the whole line through a