||No damage or little damage to roadbed or road surface; no influence to traffic capacity.
||Little subsidence or uplift on road surface; little influence to traffic capacity; slight repair is needed.
||Obvious seismic damage to roadbed and road surface; moderate influence to traffic capacity; repair is needed to make traffic capacity back to normal.
||Severe fracture to roadbed and road surface; sever influence to traffic capacity; traffic is limited until major overhaul.
||Severe fracture and dislocation to road surface; roadbed collapsed; traffic function lost resulting in traffic congestion.