| Name | Data Type | Definition | ||
|---|---|---|---|---|
| NATURAL | string | Natural surface; no treatment. | ||
| ROLLED | string | Rolled. | ||
| COMPACTED | string | Compacted | ||
| GRADED | string | Graded. | ||
| GROOVED | string | Cut or plastic grooved. | ||
| OILED | string | Oiled. | ||
| PAVED | string | Paved. | ||
| PFC | string | Porous friction coat. | ||
| AFSC | string | Aggregate friction seal coat. | ||
| RFSC | string | Rubberised friction seal coat. | ||
| NON_GROOVED | string | This covers such items as 'APSHALT NON GROOVED' . | ||
| OTHER | string | Other. |