The roadbed has two basic forms depending on the terrain conditions where it is located: embankment and cutting, commonly known as fill and excavation

The roadbed is the foundation of the road surface and refers to the bottom surface of the road surface. The part of the roadbed within the following 80cm range.

Only one should be selected for roadbed earthwork rolling and road bed rolling, because there is only one sub-item road trench (road bed) rolling in the Hebei quota.

If you are applying for a highway quota, I have no idea