Abstract:In order to further study the system scheme of long-distance expressway in multi-clustered cities, taking the “one-horizontal” expressway in Yantai as an example, the functional positioning analysis and traffic demand prediction are carried out. The overall scheme of expressway with the balanced, convenient and effective road network is proposed. By sorting out the control factors along the route, the multiple schemes are compared for the key nodes and route positions of expressway passing through the old urban areas. The corresponding countermeasures and key designs are proposed to solve the construction, operation, maintenance and traffic safety issues of large-section mountain tunnel, small-distance tunnel, and cross/parallel, ultra-long tunnel. Some references for the subsequent research and decision-making of related engineering schemes are provided.