ATSF
| Atchison Topeka & Santa Fe | 14 |
BNSF
| BNSF Railway | 1 |
CR
| Conrail | 1 |
DRGW
| Denver & Rio Grande Western | 2 |
FCM
| Ferrocarriles Nacionales de Mexico | 1 |
FNM
| Ferrocarriles Nacionales de Mexico | 1 |
FXE
| Ferromex | 5 |
MP
| Missouri Pacific | 1 |
NDEM
| NDEM | 3 |
SP
| Southern Pacific | 5 |
UP
| Union Pacific Railroad Company | 2 |