ATSF
| Atchison Topeka & Santa Fe | 20 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 25 |
CSX
| CSX Railroad | 5 |
DRGW
| Denver & Rio Grande Western | 3 |
GVSR
| Galveston Railroad L.P. | 1 |
MP
| Missouri Pacific | 1 |
NYC
| New York Central | 2 |
SP
| Southern Pacific | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 4 |
UP
| Union Pacific Railroad Company | 4 |
WP
| Western Pacific | 1 |