ALS
| Alton & Southern Railway | 1 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
BLE
| Bessemer & Lake Erie | 2 |
BO
| Baltimore & Ohio | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CGW
| Chicago Great Western | 1 |
CNW
| Chicago & Northwestern | 2 |
CO
| Chesapeake & Ohio | 4 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 1 |
CRIP
| Chicago Rock Island & Pacific | 2 |
DRGW
| Denver & Rio Grande Western | 2 |
DTI
| Detroit Toledo & Ironton | 1 |
DTS
| Detroit & Toledo ShoreLine | 1 |
GN
| Great Northern | 1 |
LN
| Louisville & Nashville | 2 |
MILW
| Milwaukee Road | 3 |
MP
| Missouri Pacific | 1 |
NP
| Northern Pacific | 1 |
NW
| Norfolk & Western | 1 |
PRR
| Pennsylvania Railroad | 1 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
RI
| RI | 1 |
SFRB
| Santa Fe | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 21 |
SSW
| St Louis Southwestern (Cotton Belt) | 5 |
UP
| Union Pacific Railroad Company | 1 |
WP
| Western Pacific | 1 |