BO
| Baltimore & Ohio | 1 |
CCO
| Clinchfield | 1 |
CO
| Chesapeake & Ohio | 3 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 43 |
LN
| Louisville & Nashville | 1 |
MCIX
| SSI Mobley Company Incorporated (M of W) | 1 |
NW
| Norfolk & Western | 9 |
PC
| Penn Central | 2 |
RMSX
| Pandrol Jackson Incorporated | 10 |
RWCX
| RWC Incorporated | 4 |
SCL
| Seaboard Coast Line | 1 |