AA
| Ann Arbor | 1 |
AGR
| Alabama and Gulf Coast | 2 |
BCOL
| Canadian National Railways | 2 |
BNSF
| BNSF Railway | 2 |
CMHX
| CarMath Incorporated | 1 |
CN
| Canadian National Railways | 1 |
CNA
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 2 |
CP
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 3 |
DWC
| Canadian National Railways | 1 |
EEC
| East Erie Commercial Railroad | 1 |
EFC
| Estrada de Ferro Carajas | 1 |
GMRC
| Green Mountain RR | 1 |
GTW
| Grand Trunk Western | 3 |
GVSR
| Galveston Railroad L.P. | 2 |
HESR
| Huron and Eastern | 1 |
IATR
| Iowa Traction Railroad Company | 2 |
IC
| Illinois Central | 2 |
ICG
| Illinois Central Gulf | 1 |
LSRC
| Lake State Railway Company | 3 |
MCVX
| Massuchusetts Call/Volunteer Firefighters Assoc. | 2 |
MEC
| Maine Central | 1 |
MMA
| Montreal, Maine & Atlantic | 1 |
MP
| Missouri Pacific | 3 |
MQT
| Marquette Rail | 1 |
MRL
| Montana Rail Link | 2 |
NSHR
| North Shore | 1 |
PM
| Pere Marquette | 1 |
RBOX
| Railbox Company | 4 |
SLC
| San Luis Central Railroad Company | 2 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 6 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
STE
| Stockton Terminal and Eastern RR | 1 |
TBOX
| TTX Company | 1 |
TSBY
| Great Lakes Central Railroad | 2 |
UELX
| ADM Transportation Company | 1 |
UP
| Union Pacific Railroad Company | 3 |
UPP
| Union Pacific Passenger | 1 |
WAB
| Wabash | 1 |
WC
| Wisconsin Central | 2 |
WCCL
| Wisconsin Central | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 2 |
WSOR
| Wisconsin & Southern | 5 |