AGR
| Alabama and Gulf Coast | 3 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
BAR
| Bangor & Aroostook | 1 |
CSX
| CSX Railroad | 1 |
EEC
| East Erie Commercial Railroad | 7 |
GMRC
| Green Mountain RR | 13 |
HS
| H and S Railroad Company | 1 |
MDR
| Kansas City Southern | 1 |
MEC
| Maine Central | 1 |
MMA
| Montreal, Maine & Atlantic | 24 |
MRL
| Montana Rail Link | 1 |
NOKL
| Northwestern Oklahoma | 2 |
SLGG
| Progress Rail Services Corporation | 3 |
SRN
| Sabine River & Northern | 2 |
YKR
| York Rail | 2 |