AM
| Arkansas & Missouri | 1 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
BKTY
| Union Pacific Railroad Company | 1 |
BNSF
| BNSF Railway | 56 |
CLC
| Columbia and Cowlitz Railway Company | 1 |
CN
| Canadian National Railways | 3 |
CNA
| Canadian National Railways | 1 |
CRLE
| Coe Rail Incorporated | 3 |
FBOX
| TTX Company | 25 |
GTW
| Grand Trunk Western | 9 |
HS
| H and S Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 9 |
IC
| Illinois Central | 2 |
KCS
| Kansas City Southern | 10 |
LRS
| Laurinburg and Southern | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
MCSA
| Moscow Camden and San Augustine Railroad | 2 |
MDW
| Minnesota Dakota and Western Railway Com | 5 |
MP
| Missouri Pacific | 4 |
MQT
| Marquette Rail | 1 |
MRL
| Montana Rail Link | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 3 |
NOKL
| Northwestern Oklahoma | 13 |
SP
| Southern Pacific | 6 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 2 |
TR
| Tomahawk Railway L.P. | 12 |
UP
| Union Pacific Railroad Company | 2 |
WC
| Wisconsin Central | 1 |