Based on the guidance of the“Internet+”and“Four Transportation”from the Ministry of Transport,through analyzing current transportation at home and abroad,focusing on further research of intelligent transportation top structure,we put forward the idea of sustainable intelligent overall structure,in which, the overall construction content 1+4+NX is explained and the details and connection of each application system is specified. Moreover,the above assumption has been applied to practice through intelligent construction projects in Beijing,Xi’an,Xining,etc.,the success of which could serve as a basis for the top-level development of intelligent transportation construction.