| Function | CBR (%) | Style | Typical Applications |
| Separation | > 8 | GW110 | Light roads, paved, unpaved |
| Stabilisation | > 5 | GW165 | Rural roads, paved, unpaved, taxiways |
| > 3 | GW235 | Urban roads, paved, runways | |
| Reinforcement | < 3 | HS (High Strength) | Soft soils, embankments, slopes, walls |