CR
| Conrail | 2 |
DLRX
| General Electric Rail Services | 2 |
MP
| Missouri Pacific | 1 |
MQRX
| MACQUARIE RAIL, INC. | 1 |
MWCX
| Midwest Railcar Corporation | 1 |
NS
| Norfolk Southern | 4 |
PMRX
| Progress Metal Reclamation Company | 1 |
PRSX
| Progress Rail Service | 1 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 1 |