BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 1 |
CGCX
| Cargill Incorporated C.G.D. Division | 1 |
CMHX
| CarMath Incorporated | 8 |
CN
| Canadian National Railways | 1 |
CP
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 4 |
DJTX
| Joseph Transportation Incorporated | 3 |
NW
| Norfolk & Western | 1 |
RFMX
| Caldwell-Baker Company | 3 |
SOO
| Soo Line | 1 |
SOU
| Southern | 5 |
WW
| Winchester & Western | 1 |