ATSF
| Atchison Topeka & Santa Fe | 3 |
BN
| Burlington Northern | 3 |
BNSF
| BNSF Railway | 1 |
DSNG
| Durango & Silverton Narrow Gauge Railroa | 1 |
GEDX
| GEDX | 2 |
HTTX
| TTX Company | 1 |
ITTX
| TTX Company | 1 |
JTTX
| TTX Company | 1 |
KRL
| Kasgro Rail Lines | 3 |
LN
| Louisville & Nashville | 1 |
OTTX
| TTX Company | 1 |
PTTX
| TTX Company | 1 |
QTTX
| TTX Company | 3 |
QUAX
| Redstreak, LLC | 1 |
TTX
| TTX Company | 1 |
UP
| Union Pacific Railroad Company | 1 |
WP
| Western Pacific | 1 |