ATW
| Atlantic and Western | 2 |
BKTY
| Union Pacific Railroad Company | 11 |
BNSF
| BNSF Railway | 1 |
CSX
| CSX Railroad | 7 |
EEC
| East Erie Commercial Railroad | 7 |
FCRD
| First Coast Railway | 2 |
HS
| H and S Railroad Company | 2 |
IANR
| Iowa Northern Ry | 1 |
KCS
| Kansas City Southern | 2 |
LRS
| Laurinburg and Southern | 13 |
MEC
| Maine Central | 2 |
MRL
| Montana Rail Link | 1 |
NS
| Norfolk Southern | 2 |
SMW
| St Marys Railway West LLC | 2 |
WRWK
| Providence & Worchester Railroad | 4 |