ATW
| Atlantic and Western | 1 |
BNSF
| BNSF Railway | 4 |
COER
| Crab Orchard & Egyptian | 1 |
CP
| Canadian Pacific Railway | 3 |
CSX
| CSX Railroad | 1 |
IBT
| International Bridge and Terminal Company | 1 |
LRS
| Laurinburg and Southern | 1 |
MP
| Missouri Pacific | 3 |
TBOX
| TTX Company | 5 |
TR
| Tomahawk Railway L.P. | 1 |
WRWK
| Providence & Worchester Railroad | 1 |
YVRR
| Yadkin Valley | 1 |