This paper discusses the development status and bottleneck of traditional intelligent transportation at first, then combined with the development of motor road coordination technology it puts forward an integrated intelligent transportation solution of car, road and cloud. Next, it presents the L4 self-driving bus demonstration operation under open road condition of Zhengzhou Smart Island, which has been put into normal operations for passengers. The successful landing of the project has verified the feasibility of the road coordination core application scheme(blind zone early warning and signal coordination), and laid a practical foundation for the development of road cooperative technology innovation. Finally the paper visions the future of the coordinated development of the road in terms of the country's latest 5G and transportation power policy.