| Clue | Source | Date |
|---|---|---|
| .08 for 49 of the 50 states | New York Times | 11 Jul 2026 |
| Bound to follow | New York Times | 23 May 2020 |
| One should drive under it | Wall Street Journal | 24 Apr 2015 |
| One should drive under it | ||
| Breathalyzer basis | ||
| Ceiling one should stay under | ||
| Highway posting |