AMTK
| Amtrak | 5 |
CDOT
| Conneticut Department of Transportation | 8 |
CSX
| CSX Railroad | 11 |
DCSX
| DCSX | 7 |
LN
| Louisville & Nashville | 1 |
MARC
| Maryland Transit Administration | 1 |
MBTA
| Massachusetts Bay Transit Authority | 2 |
MCC
| MCC | 1 |
MNCR
| Metro North Commuter Railway | 6 |
NJT
| New Jersey Transit | 66 |
NS
| Norfolk Southern | 2 |
PPCX
| AAPRCO Register Private Cars | 2 |
SRC
| Strasburg Railroad | 2 |
TOYX
| TOYX | 6 |
VRE
| Virginia Railway Express | 2 |