| Clue | Source | Date |
|---|---|---|
| Features on a track | LA Times Daily | 22 Jan 2022 |
| Features on a track | The Washington Post | 22 Jan 2022 |
| Ban these sleepers playing in brass section! | The Telegraph Toughie | 23 Sep 2016 |
| Rail supports | ||
| Rail supports | ||
| Track connectors | ||
| Support for a railway. | ||
| Railroad sleepers. |