ARR
| Alaska Railroad | 2 |
BLPX
| BLPX | 4 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 8 |
CW
| Colorado and Wyoming | 3 |
DODX
| Department Of Defense | 4 |
HTTX
| TTX Company | 1 |
MP
| Missouri Pacific | 3 |
MTTX
| TTX Company | 12 |
OTTX
| TTX Company | 6 |
QTTX
| TTX Company | 10 |
QUAX
| Redstreak, LLC | 1 |
SP
| Southern Pacific | 2 |
SPSX
| Progress Rail Services Corp | 3 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
TBCX
| Boeing Company | 10 |
TOEX
| TOEX | 1 |
TPDX
| TPDX | 12 |
TPOX
| TPOX | 16 |
TTX
| TTX Company | 1 |
UP
| Union Pacific Railroad Company | 5 |
XTTX
| TTX Company | 6 |