AERC
| Albany and Eastern Railroad Company | 1 |
BAR
| Bangor & Aroostook | 1 |
CNW
| Chicago & Northwestern | 7 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 1 |
CRIP
| Chicago Rock Island & Pacific | 1 |
EJE
| Elgin Joliet and Eastern | 1 |
ELS
| Escanaba and Lake Superior Railroad Comp | 1 |
FXE
| Ferromex | 1 |
GTW
| Grand Trunk Western | 1 |
ICG
| Illinois Central Gulf | 1 |
LN
| Louisville & Nashville | 1 |
LSI
| Lake Superior and Ishpeming Railroad | 1 |
MILW
| Milwaukee Road | 2 |
MNS
| Minneapolis Northfield & Southern | 1 |
NS
| Norfolk Southern | 1 |
NW
| Norfolk & Western | 2 |
PC
| Penn Central | 2 |
SBD
| Seaboard System | 1 |
SM
| St. Marys Railroad | 1 |
SOU
| Southern | 1 |
WAB
| Wabash | 4 |
WC
| Wisconsin Central | 3 |
WP
| Western Pacific | 1 |