With the rapid development of emerging technologies, such as cloud computing, big data, Internet of Things, artificial intelligence, fifth-generation mobile network (5G) technology, the construction of intelligent expressway systems has become a trend. Through the analysis of the intelligent expressway business and function, the overall architecture, technical architecture, and data architecture of this system are designed and presented in this paper. The design of the overall architecture describes the basis of intelligent expressway design and implementation. The technical architecture is the foundation of the overall architecture, making it with more complete functions, high security, and high feasibility. The data architecture helps to achieve effective data coordination through data standard management, resource monitoring, catalog management, metadata management, quality management, and security management. Accelerating the deep integration of modern technologies and expressway transportation management services will provide strong support for the construction of comprehensive transportation systems and a country with strong transportation networks.