ABOX
| TTX Company | 1 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
COER
| Crab Orchard & Egyptian | 1 |
CSX
| CSX Railroad | 2 |
GMRC
| Green Mountain RR | 1 |
GVSR
| Galveston Railroad L.P. | 1 |
RBOX
| Railbox Company | 3 |
SMW
| St Marys Railway West LLC | 2 |
TR
| Tomahawk Railway L.P. | 1 |
YKR
| York Rail | 1 |