AA
| Ann Arbor | 8 |
AARX
| Association of American Railroads | 1 |
AC
| Algoma Central | 1 |
ACL
| Atlantic Coast Line | 1 |
ALS
| Alton & Southern Railway | 1 |
AMTK
| Amtrak | 6 |
BN
| Burlington Northern | 7 |
BNSF
| BNSF Railway | 1 |
BO
| Baltimore & Ohio | 3 |
BR
| Buffalo and Pittsburgh | 3 |
CEI
| Chicago & Eastern Illinois | 2 |
CIL
| Chicago Indianapolis & Louisville (Monon | 5 |
CN
| Canadian National Railways | 18 |
CNJW
| CNJW | 1 |
CNW
| Chicago & Northwestern | 4 |
CO
| Chesapeake & Ohio | 14 |
CP
| Canadian Pacific Railway | 22 |
CR
| Conrail | 6 |
CRIP
| Chicago Rock Island & Pacific | 1 |
CSX
| CSX Railroad | 20 |
CTA
| Chicago Transit Authority | 4 |
CWEX
| Midwest Generation LLC | 1 |
CWI
| Chicago and Western Indiana | 1 |
CWRX
| CWR TRANSPORTATION CO. | 2 |
DM
| Detroit & Mackinac | 8 |
DMIR
| Duluth Missabe & Iron Range | 3 |
DRGW
| Denver & Rio Grande Western | 1 |
DRT
| DRT | 1 |
DTI
| Detroit Toledo & Ironton | 2 |
EJE
| Elgin Joliet and Eastern | 2 |
EMCO
| EMCO | 1 |
GTW
| Grand Trunk Western | 8 |
HD
| HD | 1 |
HVRM
| HVRM | 2 |
HZGX
| Herzog Contracting Corporation | 1 |
IC
| Illinois Central | 9 |
KUCX
| Kentucky Utilities Company | 1 |
LIRR
| Long Island Railroad | 1 |
LMIX
| Loram Maintenance of Way Inc. | 2 |
LN
| Louisville & Nashville | 3 |
METX
| METRA | 3 |
MILW
| Milwaukee Road | 1 |
MKT
| Missouri-Kansas-Texas | 4 |
MON
| Monon Route | 5 |
MSU
| MSU | 2 |
MTA
| NYC Transit | 1 |
NCMX
| North Carolina Transportation Museum | 5 |
NCSL
| Nashville Chattanooga & St Louis | 4 |
NKP
| Nickel Plate | 2 |
NNYX
| National New York Central Railroad Museu | 3 |
NP
| Northern Pacific | 1 |
NS
| Norfolk Southern | 6 |
NW
| Norfolk & Western | 9 |
NYC
| New York Central | 16 |
OCPC
| OCPC | 1 |
PACX
| Plasser American Corporation | 3 |
PC
| Penn Central | 1 |
PO
| PO | 1 |
PRR
| Pennsylvania Railroad | 1 |
PURD
| PURD | 3 |
RCPE
| Rapid City Pierre & Eastern Railroad | 1 |
RENF
| RENF | 1 |
SBD
| Seaboard System | 2 |
SCL
| Seaboard Coast Line | 2 |
SNCF
| French National Railways | 2 |
SOO
| Soo Line | 2 |
SOU
| Southern | 16 |
SP
| Southern Pacific | 4 |
SPMW
| Southern Pacific Maintenance of Way | 5 |
SPS
| Spokane Portland & Seattle | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
UP
| Union Pacific Railroad Company | 20 |
VBZ
| VBZ | 2 |
VGN
| Virginian Railway | 2 |
WGRR
| WGRR | 1 |
WPRX
| WPRX | 1 |
WRR
| WRR | 1 |
WVRR
| Whitewater Valley Railroad | 3 |