BKTY
| Union Pacific Railroad Company | 1 |
CP
| Canadian Pacific Railway | 1 |
GTW
| Grand Trunk Western | 1 |
KCS
| Kansas City Southern | 1 |
NW
| Norfolk & Western | 1 |
PSMX
| Esco Corporation | 1 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 1 |
TBOX
| TTX Company | 51 |
TR
| Tomahawk Railway L.P. | 1 |