AOK
| Arkansas-Oklahoma Railroad | 1 |
BN
| Burlington Northern | 1 |
BO
| Baltimore & Ohio | 1 |
CN
| Canadian National Railways | 1 |
CSX
| CSX Railroad | 1 |
DH
| Delaware & Hudson | 1 |
DUPX
| Du Pont De Nemours and Company Incorporated | 1 |
EEC
| East Erie Commercial Railroad | 1 |
GMRC
| Green Mountain RR | 1 |
KCS
| Kansas City Southern | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
NS
| Norfolk Southern | 2 |
PRR
| Pennsylvania Railroad | 3 |
RBOX
| Railbox Company | 1 |
RDG
| Reading Railroad | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 1 |
TR
| Tomahawk Railway L.P. | 1 |
WC
| Wisconsin Central | 2 |