| Solution | Length | |
|---|---|---|
| 4 letters | ||
| tube | 4 | |
| tram | 4 | |
| rail | 4 | |
| 5 letters | ||
| track | 5 | |
| trunk | 5 | |
| aorta | 5 | |
| 6 letters | ||
| aortal | 6 | |
| aortic | 6 | |
| aortas | 6 | |
| subway | 6 | |
| siding | 6 | |
| 7 letters | ||
| turnout | 7 | |
| railway | 7 | |
| trestle | 7 | |
| ROADWAY | 7 | |
| roadbed | 7 | |
| 8 letters | ||
| railroad | 8 | |
| terminal | 8 | |
| terminus | 8 | |
| 9 letters | ||
| sidetrack | 9 | |
| 10 letters | ||
| switchback | 10 | |
| 11 letters | ||
| underground | 11 | |
| 14 letters | ||
| streetcar line | 14 | |