AMTK
| Amtrak | 8 |
CSX
| CSX Railroad | 14 |
MARC
| Maryland Transit Administration | 2 |
NJT
| New Jersey Transit | 11 |
NW
| Norfolk & Western | 1 |
PRR
| Pennsylvania Railroad | 6 |
RDG
| Reading Railroad | 3 |
SLRG
| San Luis and Rio Grande Railroad | 1 |
SOU
| Southern | 3 |
SPAX
| Southeastern Pennsylvania Transportation (SEPTA) | 3 |