Along the center line vertical cutting line is the route profile. It reflects the ups and downs road ground in the middle of the situation and design of vertical slope, so that you can see the vertical earthwork digging and filling. The road Profile combined with plans to complete the express road location. Vertical section design of main content is based on road grade, along the natural conditions and high structure control, confirm the right elevation, the longitudinal slope gradient and slope length and design of vertical curves.