AGR
| Alabama and Gulf Coast | 4 |
AM
| Arkansas & Missouri | 6 |
ATW
| Atlantic and Western | 8 |
BAEX
| Andersons | 1 |
BKTY
| Union Pacific Railroad Company | 10 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 5 |
BR
| Buffalo and Pittsburgh | 3 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 9 |
CP
| Canadian Pacific Railway | 10 |
CPAA
| Canadian Pacific Railway | 3 |
CSX
| CSX Railroad | 39 |
CUOH
| Columbus and Ohio River Railroad Company | 1 |
EEC
| East Erie Commercial Railroad | 1 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FCRD
| First Coast Railway | 1 |
FXE
| Ferromex | 7 |
GNWR
| Genesee and Wyoming Railroad Company | 6 |
GTRA
| Golden Triangle Railroad | 1 |
GTW
| Grand Trunk Western | 2 |
HESR
| Huron and Eastern | 1 |
HS
| H and S Railroad Company | 3 |
IATR
| Iowa Traction Railroad Company | 2 |
IC
| Illinois Central | 1 |
ICG
| Illinois Central Gulf | 3 |
KCS
| Kansas City Southern | 5 |
KYLE
| Kyle Railroad | 1 |
LRS
| Laurinburg and Southern | 2 |
LRWN
| Little Rock & Western | 3 |
MP
| Missouri Pacific | 2 |
MRL
| Montana Rail Link | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 4 |
NOKL
| Northwestern Oklahoma | 2 |
NOPB
| New Orleans Public Belt Railroad | 1 |
NS
| Norfolk Southern | 26 |
OAR
| Old Augusta Railroad | 10 |
RVSC
| Rio Valley Switching Company | 18 |
SLC
| San Luis Central Railroad Company | 1 |
SOU
| Southern | 41 |
SRN
| Sabine River & Northern | 4 |
WCCL
| Wisconsin Central | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 6 |
WRWK
| Providence & Worchester Railroad | 3 |
WSOR
| Wisconsin & Southern | 1 |