Abstract:With the enlarging urban scale, the outlying districts and groups of the central city continue to grow. As the district locations, functional orientations and development stages of the outlying districts and groups are different, the road network design needs to consider all factors comprehensively. Taking the design of road network in Ah Area of Xiyong Group as an example, the external traffic links of Ah Area and the connection with the surrounding groups are sorted out, and the rail alignment is demonstrated. The factors of optimizing the road network structure, vertical design of road network, balancing the earth and stone, and construction sequence of road network are fully considered which make the design of road network able to meet the traffic demand of road network in the area and the demand of urban planning management.