BN
| Burlington Northern | 26 |
BO
| Baltimore & Ohio | 1 |
CASS
| Cass Scenic | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CO
| Chesapeake & Ohio | 7 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 1 |
CRIP
| Chicago Rock Island & Pacific | 1 |
DH
| Delaware & Hudson | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
EJE
| Elgin Joliet and Eastern | 5 |
GLRX
| Georgetown Loop Railroad Incorporated | 1 |
GN
| Great Northern | 4 |
GNA
| Graysonia Nashville & Ashdown | 1 |
GTW
| Grand Trunk Western | 1 |
IC
| Illinois Central | 5 |
IHB
| Indiana Harbor Belt | 8 |
LNE
| Lehigh and New England Ry | 1 |
MICO
| MICO | 1 |
MON
| Monon Route | 2 |
NP
| Northern Pacific | 1 |
NS
| Norfolk Southern | 3 |
PC
| Penn Central | 1 |
PRR
| Pennsylvania Railroad | 2 |
RDG
| Reading Railroad | 8 |
SOO
| Soo Line | 1 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 2 |
SRC
| Strasburg Railroad | 2 |
UP
| Union Pacific Railroad Company | 2 |