AMTK
| Amtrak | 1 |
BO
| Baltimore & Ohio | 12 |
CO
| Chesapeake & Ohio | 6 |
CR
| Conrail | 12 |
CRR
| Clinchfield | 4 |
CSX
| CSX Railroad | 12 |
NOKL
| Northwestern Oklahoma | 2 |
NYC
| New York Central | 3 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
SBD
| Seaboard System | 2 |
SCL
| Seaboard Coast Line | 6 |