Abstract:The domestic development status of intelligent expressway is introduced. Focusing on G15 Shanghai Jiading-Liuhe Section Expressway Intelligent Reconstruction Project, the overall technical architecture of G15 intelligent expressway is built. The physical composition of holographic sensing network is discussed. A full-element and full-cycle management and control platform based on BIM+GIS is proposed. The information interaction path of data transmission network is introduced. Six application modes of intelligent expressway are summarized. Finally, three follow-up research directions are proposed to enrich the application scenarios, improve the core algorithms and improve the environmental protection, toughness and low carbon for the intelligent expressway.