Abstract:Provincial Highway 213 Line is a main channel out of city in the west of Zhangye City. Its traffic volume of transit and tourism is large. It is required to optimize the line alignment, extend the section and lay the pipelines in order to make it transform into an urban road with the perfect function, convenient traffic and better service of regional economic development. The position, road status and traffic volume of this road section in the road network traffic are analyzed. The engineering scheme design of the project is expounded from the technical standards, section layout, new and old roadbed overlap, and passing through under railway box culvert. Finally, the essentials of reconstructing the provincial highways into urban roads are summarized.