ACL
| Atlantic Coast Line | 3 |
BO
| Baltimore & Ohio | 5 |
CR
| Conrail | 15 |
CSX
| CSX Railroad | 107 |
LN
| Louisville & Nashville | 3 |
NS
| Norfolk Southern | 4 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 24 |
PC
| Penn Central | 2 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
SBD
| Seaboard System | 6 |
SCL
| Seaboard Coast Line | 5 |
SOU
| Southern | 1 |