BM
| Boston & Maine | 5 |
BN
| Burlington Northern | 2 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 3 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 5 |
CS
| Colorado & Southern | 1 |
ELS
| Escanaba and Lake Superior Railroad Comp | 1 |
IC
| Illinois Central | 2 |
MEC
| Maine Central | 1 |
MILW
| Milwaukee Road | 1 |
MP
| Missouri Pacific | 1 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 1 |
NYSW
| New York Susquehanna & Western | 2 |
SOO
| Soo Line | 1 |
SP
| Southern Pacific | 3 |
THB
| Toronto Hamilton & Buffalo | 1 |
TPW
| Toledo Peoria & Western | 2 |