Design basis: Code for Design of Urban Road Engineering (CJJ37-2012), Specification for Highway Geotechnical Test (JTGE40-2007), Code for Design of Outdoor Drainage (GB50014-2006) (2011 version) Road grade: urban branch road, urban secondary trunk road; Design speed: 20-30Km/h; Minimum circular curve radius: 500m; minimum circular curve length: 169m; minimum horizontal curve length: 169m; maximum longitudinal slope: 7.866%; Structural design load: urban level B; Crowd design load: 3.5KN/m2; Pavement design axle load: BZZ-100. The design drawing of this section shows three roads, urban branch roads, with a total length of 576.403m and 619.147m, and urban secondary trunk roads, with a total length of 185.898m, all of which are two-way four lane roads. The drainage design scope covers the rain, sewage and culvert system within the scope of the project. Newly built sewage pipeline, the plot is about every 200m