AERC
| Albany and Eastern Railroad Company | 1 |
ATW
| Atlantic and Western | 2 |
BCOL
| Canadian National Railways | 1 |
BNSF
| BNSF Railway | 1 |
BR
| Buffalo and Pittsburgh | 1 |
CN
| Canadian National Railways | 2 |
CNA
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 3 |
COP
| City of Prineville Railway | 1 |
CP
| Canadian Pacific Railway | 3 |
CRLE
| Coe Rail Incorporated | 2 |
CSX
| CSX Railroad | 1 |
DME
| Dakota, Minnesota and Eastern | 1 |
DWC
| Canadian National Railways | 2 |
EEC
| East Erie Commercial Railroad | 2 |
FBOX
| TTX Company | 1 |
GVSR
| Galveston Railroad L.P. | 2 |
HCGX
| COMPASS MINERALS INTERNATIONAL INC | 1 |
IBT
| International Bridge and Terminal Company | 1 |
LW
| Louisville and Wadley Railway Company | 2 |
MDW
| Minnesota Dakota and Western Railway Com | 3 |
MP
| Missouri Pacific | 5 |
MRL
| Montana Rail Link | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NP
| Northern Pacific | 2 |
RBOX
| Railbox Company | 2 |
SLC
| San Luis Central Railroad Company | 1 |
SOO
| Soo Line | 2 |
SOU
| Southern | 5 |
SP
| Southern Pacific | 2 |
SPS
| Spokane Portland & Seattle | 1 |
TR
| Tomahawk Railway L.P. | 1 |
USLX
| General Electric Rail Services | 1 |
WC
| Wisconsin Central | 1 |
WCCL
| Wisconsin Central | 2 |
WP
| Western Pacific | 1 |