| Name | Data Type | Definition | ||
|---|---|---|---|---|
| GOOD | string | Good. | ||
| MEDIUM_GOOD | string | Medium to good. | ||
| MEDIUM | string | Medium. | ||
| MEDIUM_POOR | string | Medium to poor. | ||
| POOR | string | Poor. | ||
| UNRELIABLE | string | The surface conditions or available friction measuring device do not permit a reliable surface friction measurement to be made. | ||
| OTHER | string | Other |