AOK
| Arkansas-Oklahoma Railroad | 3 |
ATW
| Atlantic and Western | 1 |
BCOL
| Canadian National Railways | 2 |
BLHX
| SMBC RAIL SERVICES LLC | 1 |
BNSF
| BNSF Railway | 2 |
BR
| Buffalo and Pittsburgh | 1 |
CAGY
| Columbus & Greenville Railway | 1 |
CN
| Canadian National Railways | 1 |
COER
| Crab Orchard & Egyptian | 2 |
CSX
| CSX Railroad | 3 |
DWC
| Canadian National Railways | 1 |
GACX
| General American Marks Company | 1 |
GAEX
| General American Marks Company | 4 |
GNRR
| Georgia Northeastern | 2 |
HLSC
| Hampton Railway Incorporated | 1 |
IANR
| Iowa Northern Ry | 3 |
LRS
| Laurinburg and Southern | 2 |
MCSA
| Moscow Camden and San Augustine Railroad | 1 |
MSRC
| Kansas City Southern | 1 |
NDYX
| First Union Rail | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 5 |
NS
| Norfolk Southern | 2 |
SMW
| St Marys Railway West LLC | 2 |
SOO
| Soo Line | 7 |
TR
| Tomahawk Railway L.P. | 3 |
TTFX
| TTX Company | 1 |
TTZX
| TTX Company-Centerbeam Flats | 28 |
UCRY
| Utah Central | 2 |
UP
| Union Pacific Railroad Company | 1 |
WC
| Wisconsin Central | 2 |
WRWK
| Providence & Worchester Railroad | 4 |