RDI |
Damage degree |
Damage Description |
RDI≤1.5 |
Intact |
No damage or little damage to roadbed or road surface; no influence to traffic capacity. |
1.5<RDI≤2.5 |
Slight damage |
Little subsidence or uplift on road surface; little influence to traffic capacity; slight repair is needed. |
2.5<RDI≤3.5 |
Medium damage |
Obvious seismic damage to roadbed and road surface; moderate influence to traffic capacity; repair is needed to make traffic capacity back to normal. |
3.5<RDI≤4.5 |
Severe damage |
Severe fracture to roadbed and road surface; sever influence to traffic capacity; traffic is limited until major overhaul. |
RDI>4.5 |
Destroyed |
Severe fracture and dislocation to road surface; roadbed collapsed; traffic function lost resulting in traffic congestion. |