| Road surface appearance | Deflections (×1/100 m) | ||
| Low Cd1= 60 Cd2 = 80 High | |||
| Good [Is = 1] | Q1 (maintenace) | Q2 (maintenace) | Q3 (?) |
| Cracked but undeformed [Is = 2 - 3] | Q2 (maintenace) | Q3 (?) | Q4 (reinforcement) |
| Deformed and cracked [Is = 4 - 7] | Q3 (?) | Q4 (reinforcement) | Q5 (reinforcement) |