ATSF
| Atchison Topeka & Santa Fe | 1 |
AZER
| Arizona Eastern Railway Company | 2 |
BNSF
| BNSF Railway | 2 |
DRGW
| Denver & Rio Grande Western | 2 |
FSSR
| FSSR | 1 |
FXE
| Ferromex | 9 |
HLMX
| Helm Financial Corporation | 2 |
MP
| Missouri Pacific | 1 |
NDEM
| NDEM | 2 |
SP
| Southern Pacific | 2 |
UP
| Union Pacific Railroad Company | 1 |