| Clue | Source | Date |
|---|---|---|
| Green sign often seen with a distance | Newsday | 13 May 2023 |
| Where gas and lodging may be found | LA Times Daily | 14 Apr 2016 |
| On some roads, it might be several miles after the last one | ||
| On some roads, it might be several miles after the last one | ||
| Informational sign on an Interstate | ||
| Highway sign listing additional points of interest |