The ministry of communications has been proposed a " three main and one support " ( the main framework of highway , the main channel of water transport , the main hub of harbor station , and the supporting system of modern traffic ) long - term plan of construction of communications , then carrying out nationwide distribution plan of national arterial highway system and highway main hub system 交通部提出了“三主一支持”的交通建设长远规划，并进行了全国国道主干线系统和公路主枢纽系统的布局规划。目前，各省交通厅在国家级公路主枢纽系统的总体框架下，分别进行了各省的二级公路枢纽系统的规划。
