AOK
| Arkansas-Oklahoma Railroad | 1 |
ATW
| Atlantic and Western | 1 |
BNSF
| BNSF Railway | 7 |
FBOX
| TTX Company | 8 |
IBT
| International Bridge and Terminal Company | 8 |
LRS
| Laurinburg and Southern | 1 |
QC
| Quebec Central | 7 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TR
| Tomahawk Railway L.P. | 1 |
UP
| Union Pacific Railroad Company | 2 |
WC
| Wisconsin Central | 2 |