AOK
| Arkansas-Oklahoma Railroad | 1 |
ATW
| Atlantic and Western | 1 |
BCOL
| Canadian National Railways | 2 |
BNSF
| BNSF Railway | 7 |
CN
| Canadian National Railways | 6 |
CNA
| Canadian National Railways | 1 |
COER
| Crab Orchard & Egyptian | 1 |
DWC
| Canadian National Railways | 3 |
GACX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 1 |
HLSC
| Hampton Railway Incorporated | 1 |
LRWN
| Little Rock & Western | 1 |
NAFX
| General Electric Rail Services | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 1 |
RVPR
| Riverport R.R., L.L.C. | 1 |
SMW
| St Marys Railway West LLC | 3 |
SOO
| Soo Line | 1 |
TR
| Tomahawk Railway L.P. | 3 |
TTZX
| TTX Company-Centerbeam Flats | 17 |
UCIR
| Union County Industrial Railroad | 1 |
UP
| Union Pacific Railroad Company | 2 |
WC
| Wisconsin Central | 2 |
WRWK
| Providence & Worchester Railroad | 2 |