AOK
| Arkansas-Oklahoma Railroad | 1 |
ATW
| Atlantic and Western | 1 |
BAEX
| Andersons | 1 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 6 |
CIC
| Cedar Rapids & Iowa City | 1 |
CMHX
| CarMath Incorporated | 1 |
CNA
| Canadian National Railways | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 1 |
DME
| Dakota, Minnesota and Eastern | 1 |
EEC
| East Erie Commercial Railroad | 1 |
FXE
| Ferromex | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 2 |
GTW
| Grand Trunk Western | 3 |
HS
| H and S Railroad Company | 1 |
IATR
| Iowa Traction Railroad Company | 1 |
ICG
| Illinois Central Gulf | 1 |
KCS
| Kansas City Southern | 7 |
MNNR
| Minnesota Commercial | 3 |
MWCX
| Midwest Railcar Corporation | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 3 |
NSHR
| North Shore | 2 |
NYC
| New York Central | 1 |
RBOX
| Railbox Company | 1 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 1 |
SCL
| Seaboard Coast Line | 1 |
SOU
| Southern | 5 |
SP
| Southern Pacific | 6 |
TBOX
| TTX Company | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 1 |
UP
| Union Pacific Railroad Company | 3 |
WC
| Wisconsin Central | 3 |
WCOR
| Wellsboro and Corning Railroad Company | 2 |