| Clue | Source | Date |
|---|---|---|
| 'Turn back' sign | Newsday | 03 Feb 2023 |
| Sign you may see before making a U-turn | The Washington Post Sunday | 08 Mar 2020 |
| Sign words suggesting a bad shortcut? | LA Times Daily | 09 Mar 2019 |
| Sign words suggesting a bad shortcut? | The Washington Post | 09 Mar 2019 |
| Sign words suggesting a bad shortcut? |