| Clue | Source | Date |
|---|---|---|
| It's not a side road | The Washington Post | 23 Jan 2021 |
| It's not a side road | LA Times Daily | 23 Jan 2021 |
| Main railway route | ||
| Main railway route | USA Today | 27 Dec 2018 |
| Main communication channel | ||
| Railroad artery, e.g. | ||
| Main communication channel | ||
| Railroad artery, e.g. | ||
| Phones in Fords? | ||
| Switchboard connection | ||
| Main railway route. | ||
| Part of a railroad system. |