ATW
| Atlantic and Western | 1 |
FXE
| Ferromex | 2 |
HS
| H and S Railroad Company | 1 |
KCS
| Kansas City Southern | 1 |
KCSM
| Kansas City Southern De Mexico | 1 |
NS
| Norfolk Southern | 1 |
TFM
| Kansas City Southern De Mexico | 4 |
TIMX
| Trinity Industries Leasing Company | 1 |
TM
| Texas-Mexican | 2 |
TR
| Tomahawk Railway L.P. | 1 |