AMTK
| Amtrak | 2 |
ARR
| Alaska Railroad | 2 |
AT
| Auto Train | 1 |
ATSF
| Atchison Topeka & Santa Fe | 19 |
BM
| Boston & Maine | 1 |
BN
| Burlington Northern | 157 |
BO
| Baltimore & Ohio | 8 |
BOCT
| CSX Transportation (Baltimore & Ohio Chicago Terminal Railro | 1 |
BRC
| Belt Railway of Chicago | 5 |
CBQ
| Chicago Burlington & Quincy | 79 |
CC
| Chicago Central & Pacific | 2 |
CGW
| Chicago Great Western | 2 |
CN
| Canadian National Railways | 2 |
CNW
| Chicago & Northwestern | 22 |
CO
| Chesapeake & Ohio | 5 |
CP
| Canadian Pacific Railway | 3 |
CR
| Conrail | 13 |
CRIP
| Chicago Rock Island & Pacific | 14 |
CRR
| Clinchfield | 1 |
CS
| Colorado & Southern | 1 |
CSS
| Chicago South Shore And South Bend | 7 |
DRGW
| Denver & Rio Grande Western | 8 |
EJE
| Elgin Joliet and Eastern | 2 |
FWD
| Fort Worth & Denver | 3 |
GMO
| Gulf Mobile & Ohio | 2 |
GN
| Great Northern | 10 |
GTW
| Grand Trunk Western | 4 |
GWR
| Great Western Railway Company | 2 |
IC
| Illinois Central | 3 |
ICG
| Illinois Central Gulf | 5 |
IHB
| Indiana Harbor Belt | 4 |
INPR
| Idaho Northern and Pacific Railroad | 1 |
KMRY
| KMRY | 1 |
LN
| Louisville & Nashville | 23 |
MEC
| Maine Central | 4 |
MILW
| Milwaukee Road | 14 |
MKT
| Missouri-Kansas-Texas | 4 |
MNA
| Missouri and Northern Arkansas | 2 |
MNS
| Minneapolis Northfield & Southern | 2 |
MON
| Monon Route | 1 |
MP
| Missouri Pacific | 37 |
NIRC
| NIRC | 1 |
NKP
| Nickel Plate | 1 |
NP
| Northern Pacific | 11 |
NW
| Norfolk & Western | 11 |
PREX
| Pioneer Rail Equipment | 1 |
PRR
| Pennsylvania Railroad | 1 |
PTM
| Portland Terminal | 1 |
SBD
| Seaboard System | 8 |
SCL
| Seaboard Coast Line | 9 |
SLSF
| Saint Louis-San Francisco | 15 |
SOO
| Soo Line | 9 |
SOU
| Southern | 13 |
SP
| Southern Pacific | 6 |
SPS
| Spokane Portland & Seattle | 1 |
TPW
| Toledo Peoria & Western | 1 |
UP
| Union Pacific Railroad Company | 26 |
WM
| Western Maryland | 1 |