BO
| Baltimore & Ohio | 1 |
CR
| Conrail | 7 |
CSX
| CSX Railroad | 24 |
ENVX
| EnergySolutions LLC | 1 |
ISGX
| International Steel Group | 1 |
LN
| Louisville & Nashville | 1 |
NS
| Norfolk Southern | 1 |
NYC
| New York Central | 1 |
PC
| Penn Central | 1 |
SBD
| Seaboard System | 5 |
SCL
| Seaboard Coast Line | 1 |