Connotation of SRI

Road infrastructure is an important component of the urban transportation system, which has a significant effect on the development of cities. Therefore, the development of smart urban road infrastructures should be guided by the future development directions of urban transportation and cities. It is evident that SRI will play an increasingly important role in the construction of smart transportation systems and smart cities. Meanwhile, the continuous development of new technologies and concepts, such as connected vehicles, autonomous vehicles, MaaS, smart monitoring systems, functional pavements, etc., brings opportunities and challenges to the development of SRI. An increasing number of practices are being carried out around the world to investigate and fulfill SRI's connotation. However, SRI has not yet been clearly defined. With this understanding, this chapter focuses on urban road infrastructure as the primary research subject, discusses the basic elements that SRI should encompass, and expounds on the connotation and architecture of SRI.