AMTK
| Amtrak | 2 |
BO
| Baltimore & Ohio | 1 |
CR
| Conrail | 2 |
CSX
| CSX Railroad | 1 |
DODX
| Department Of Defense | 12 |
IHB
| Indiana Harbor Belt | 1 |
ITTX
| TTX Company | 2 |
OMID
| Ontario Midland Railroad Corporation | 3 |
PRR
| Pennsylvania Railroad | 1 |
PTTX
| TTX Company | 5 |
QTTX
| TTX Company | 2 |
RT
| River Terminal Railway Company | 1 |
SRC
| Strasburg Railroad | 1 |
TTEX
| TTX Company - Articulated Flat Cars (TOFC/COFC) | 1 |
TTMX
| TTX Company | 2 |
TTX
| TTX Company | 1 |
WCRL
| West Chester Railroad Company | 6 |
WM
| Western Maryland | 1 |
WP
| Western Pacific | 1 |
WWRC
| Wilmington and Western Railroad | 2 |
XTTX
| TTX Company | 1 |