| Clue | Source | Date |
|---|---|---|
| Colored path on a transit map | ||
| Greyhound driver's course | Eugene Sheffer | 26 Jun 2024 |
| Greyhound driver's assignment | Eugene Sheffer | 01 Jun 2022 |
| Certain urban map | New York Times | 19 Dec 2021 |
| Greyhound driver's assignment | Eugene Sheffer | 30 Jun 2020 |
| Shelter posting | Newsday | 15 Sep 2018 |
| It may be diagrammed on a city map | ||
| Transit map listing |