| Clue | Source | Date |
|---|---|---|
| Director of Transport, Strathclyde's good time girl off and on! | The Telegraph Toughie | 28 Jun 2024 |
| It keeps things on track | New York Times | 23 Jan 2016 |
| It keeps things on track | ||
| Assembly line track | New York Times | 06 Sep 2015 |
| Assembly line track | ||
| Stabilizing track | ||
| Door track |