AMTK
| Amtrak | 1 |
BA
| Baltimore & Annapolis | 1 |
BO
| Baltimore & Ohio | 3 |
CN
| Canadian National Railways | 1 |
CO
| Chesapeake & Ohio | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 2 |
GSMR
| Great Smoky Mountains | 1 |
HVSR
| Hocking Valley Scenic | 1 |
MGA
| Monongahela RR | 1 |
RFP
| Richmond Fredericksburg & Potomac | 2 |
SPAX
| Southeastern Pennsylvania Transportation (SEPTA) | 1 |