ATSF
| Atchison Topeka & Santa Fe | 1 |
CAGY
| Columbus & Greenville Railway | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 1 |
GTW
| Grand Trunk Western | 1 |
HS
| H and S Railroad Company | 1 |
KCS
| Kansas City Southern | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 1 |
NW
| Norfolk & Western | 1 |
TR
| Tomahawk Railway L.P. | 2 |
UP
| Union Pacific Railroad Company | 2 |