| Clue | Source | Date |
|---|---|---|
| Highway advisory | Newsday | 24 Feb 2019 |
| Traffic warning | Wall Street Journal | 01 Dec 2018 |
| Sign on a highway | LA Times Daily | 19 Jan 2018 |
| Sign on a highway | The Washington Post | 19 Jan 2018 |
| Traffic warning | ||
| Sign on a highway | ||
| Sign to continue straight | New York Times | 28 Sep 2016 |
| Sign to continue straight | ||
| Traffic sign that restricts options | ||
| Rush hour restriction | ||
| City traffic sign | ||
| Intersection interdiction | ||
| Highway sign | ||
| Downtown street sign | ||
| Street sign | ||
| Traffic sign. |