ARMN
| Union Pacific Railroad Company | 31 |
BNSF
| BNSF Railway | 9 |
CRYX
| Cryo-Trans Incorporated | 26 |
CSX
| CSX Railroad | 23 |
CYRX
| CYRX | 2 |
FGEX
| Fruit Growers Express | 1 |
GMRC
| Green Mountain RR | 1 |
JRSX
| J.R. Simplot Company | 2 |
MDT
| Merchants Despatch Transportation | 1 |
TILX
| Trinity Industries Leasing Company | 4 |
TPIX
| Tropicana Transportation Corp | 59 |