AGR
| Alabama and Gulf Coast | 1 |
BB
| Buckingham Branch | 1 |
CNA
| Canadian National Railways | 1 |
CO
| Chesapeake & Ohio | 1 |
CSX
| CSX Railroad | 1 |
DODX
| Department Of Defense | 2 |
DWC
| Canadian National Railways | 1 |
FBOX
| TTX Company | 1 |
MEC
| Maine Central | 1 |
NS
| Norfolk Southern | 1 |
RFP
| Richmond Fredericksburg & Potomac | 2 |
SOU
| Southern | 1 |
USAX
| United States Army | 2 |