AERC
| Albany and Eastern Railroad Company | 1 |
AGR
| Alabama and Gulf Coast | 1 |
ATW
| Atlantic and Western | 1 |
BKTY
| Union Pacific Railroad Company | 6 |
BNSF
| BNSF Railway | 1 |
CNW
| Chicago & Northwestern | 4 |
EEC
| East Erie Commercial Railroad | 1 |
LRS
| Laurinburg and Southern | 3 |
MEC
| Maine Central | 1 |
MRL
| Montana Rail Link | 8 |
NLG
| Kansas City Southern Railway Company (North Louisiana & Gulf) | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 1 |