The current situation of the infrastructure in the new urban area is backward, and there are many planned road networks. In the design of the main road network in the new urban area, how to balance the current situation with the planning is an objective problem for designers. As the leading specialty in the traffic project design, the overall professional level often has an important impact on the design and implementation progress of a project. Combined with the construction project of Wanhuayuan Road in Changsha County, the overall design process of the road is briefly described. The achievements can be referred for the subsequent similar projects.