CR
| Conrail | 4 |
CSX
| CSX Railroad | 18 |
DOTX
| USDOT/Federal Railroad Administration | 9 |
NW
| Norfolk & Western | 1 |
NYSW
| New York Susquehanna & Western | 30 |
PRSX
| Progress Rail Service | 5 |
RWC
| RWC | 3 |
SPSX
| Progress Rail Services Corp | 12 |
TE
| Tacoma Eastern Railway Company | 9 |