AA
| Ann Arbor | 1 |
ABOX
| TTX Company | 2 |
AOK
| Arkansas-Oklahoma Railroad | 4 |
ATW
| Atlantic and Western | 6 |
BNSF
| BNSF Railway | 7 |
CLC
| Columbia and Cowlitz Railway Company | 1 |
CMHX
| CarMath Incorporated | 1 |
CO
| Chesapeake & Ohio | 1 |
CP
| Canadian Pacific Railway | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 2 |
EEC
| East Erie Commercial Railroad | 2 |
FBOX
| TTX Company | 3 |
GMRC
| Green Mountain RR | 1 |
GTW
| Grand Trunk Western | 1 |
HS
| H and S Railroad Company | 1 |
KCS
| Kansas City Southern | 5 |
MB
| Meridian & Bigbee | 1 |
MEC
| Maine Central | 1 |
MP
| Missouri Pacific | 8 |
MWCX
| Midwest Railcar Corporation | 1 |
NCCX
| NCCX | 1 |
NS
| Norfolk Southern | 12 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 4 |
RBOX
| Railbox Company | 5 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 9 |
TBOX
| TTX Company | 5 |
TR
| Tomahawk Railway L.P. | 2 |
UP
| Union Pacific Railroad Company | 3 |
WAB
| Wabash | 1 |