BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 1 |
CNW
| Chicago & Northwestern | 4 |
EEC
| East Erie Commercial Railroad | 4 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 3 |
GNWR
| Genesee and Wyoming Railroad Company | 1 |
HESR
| Huron and Eastern | 1 |
HS
| H and S Railroad Company | 2 |
IC
| Illinois Central | 1 |
KCS
| Kansas City Southern | 2 |
KYLE
| Kyle Railroad | 2 |
MP
| Missouri Pacific | 7 |
MRL
| Montana Rail Link | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 3 |
SLC
| San Luis Central Railroad Company | 3 |
SOU
| Southern | 6 |
SPSX
| Progress Rail Services Corp | 1 |
SRN
| Sabine River & Northern | 1 |
WLO
| Waterloo Railway Company (Illinois Central) | 1 |