ANR
| Angelina and Neches River Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 4 |
BCIT
| Canadian National Railways | 1 |
BCOL
| Canadian National Railways | 3 |
BN
| Burlington Northern | 3 |
BNSF
| BNSF Railway | 1 |
CBL
| Conemaugh and Black Lick Railroad | 1 |
CLC
| Columbia and Cowlitz Railway Company | 1 |
CNW
| Chicago & Northwestern | 4 |
CP
| Canadian Pacific Railway | 2 |
CR
| Conrail | 6 |
CSX
| CSX Railroad | 9 |
DTI
| Detroit Toledo & Ironton | 2 |
DWC
| Canadian National Railways | 1 |
EEC
| East Erie Commercial Railroad | 2 |
GTW
| Grand Trunk Western | 4 |
GVSR
| Galveston Railroad L.P. | 1 |
IBT
| International Bridge and Terminal Company | 1 |
IC
| Illinois Central | 3 |
LW
| Louisville and Wadley Railway Company | 1 |
MP
| Missouri Pacific | 6 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NS
| Norfolk Southern | 1 |
NSHR
| North Shore | 1 |
NW
| Norfolk & Western | 2 |
ONT
| Ontario Northland Railway | 3 |
QGRY
| Quebec Gatineau Railway Incorporated | 1 |
SLGG
| Progress Rail Services Corporation | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SOU
| Southern | 7 |
SP
| Southern Pacific | 3 |
SRY
| Southern Railway of British Columbia Lim | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
UPP
| Union Pacific Passenger | 1 |
WC
| Wisconsin Central | 21 |
WCCL
| Wisconsin Central | 3 |
WLO
| Waterloo Railway Company (Illinois Central) | 1 |
WP
| Western Pacific | 4 |
WSOR
| Wisconsin & Southern | 2 |
YARR
| Youngstown and Austintown Railroad | 1 |