AOK
| Arkansas-Oklahoma Railroad | 1 |
ATW
| Atlantic and Western | 2 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 2 |
CSX
| CSX Railroad | 1 |
IBT
| International Bridge and Terminal Company | 4 |
KCS
| Kansas City Southern | 1 |
LN
| Louisville & Nashville | 1 |
MP
| Missouri Pacific | 1 |
NOKL
| Northwestern Oklahoma | 4 |
RBOX
| Railbox Company | 2 |
SLSF
| Saint Louis-San Francisco | 1 |
SOU
| Southern | 2 |
SRY
| Southern Railway of British Columbia Lim | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 4 |
TR
| Tomahawk Railway L.P. | 1 |