AC
| Algoma Central | 1 |
ALY
| Allegheny and Eastern Railroad Incorpora | 7 |
APA
| Apache Railway Company | 1 |
ATW
| Atlantic and Western | 1 |
BN
| Burlington Northern | 16 |
BNSF
| BNSF Railway | 16 |
CN
| Canadian National Railways | 1 |
CW
| Colorado and Wyoming | 4 |
DWC
| Canadian National Railways | 1 |
GNRR
| Georgia Northeastern | 1 |
IC
| Illinois Central | 1 |
ICE
| Iowa Chicago and Eastern | 5 |
JTSX
| Joseph Transportation Incorporated | 3 |
KCS
| Kansas City Southern | 10 |
LMIC
| Lake Michigan & Indiana Railroad | 1 |
LRS
| Laurinburg and Southern | 1 |
LW
| Louisville and Wadley Railway Company | 14 |
MVKX
| Tubular Transport Services | 2 |
NOKL
| Northwestern Oklahoma | 5 |
PEYX
| Transportation Technology Services Inc | 4 |
RMGX
| Andersons - Railgroup | 3 |
SOU
| Southern | 5 |
SSW
| St Louis Southwestern (Cotton Belt) | 5 |
TFM
| Kansas City Southern De Mexico | 2 |
TKEN
| Tennken Railroad Company Incorporated | 5 |
TOE
| Texas Oklahoma and Eastern RR Company | 1 |
TR
| Tomahawk Railway L.P. | 1 |
TTPX
| TTX Company - Bulkhead Flats | 53 |
TVRR
| Tulare Valley Railroad Company | 2 |
UP
| Union Pacific Railroad Company | 6 |
WC
| Wisconsin Central | 5 |