| Clue | Source | Date |
|---|---|---|
| "No running" on a pool deck | LA Times Daily | 02 Feb 2024 |
| Floor warning | New York Times | 21 Mar 2017 |
| Floor warning | ||
| Road warning | ||
| Warning sign of Aquarius? | ||
| Warning sign | ||
| Highway caution | ||
| Driver's heads-up | ||
| Field condition | ||
| Like soap in the shower? | ||
| Pavement caveat | ||
| Pavement caveat | ||
| Warning sign | ||
| Road caution sign | ||
| Road warning | ||
| Cautionary sign | ||
| Road warning | ||
| Parkway warning sign | ||
| Highway sign. | ||
| Traffic warning for a rainy day. |