AGR
| Alabama and Gulf Coast | 3 |
ATW
| Atlantic and Western | 9 |
BKTY
| Union Pacific Railroad Company | 506 |
CAGY
| Columbus & Greenville Railway | 1 |
CAIX
| CAI Rail Inc. | 7 |
CLSX
| Cargill Incorporated Salt Division | 1 |
CNW
| Chicago & Northwestern | 4 |
CP
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 4 |
EEC
| East Erie Commercial Railroad | 11 |
ELS
| Escanaba and Lake Superior Railroad Comp | 1 |
FCRD
| First Coast Railway | 3 |
GMRC
| Green Mountain RR | 1 |
HS
| H and S Railroad Company | 15 |
ITFX
| INFINITY TRANSPORTATION III LLC | 3 |
KCS
| Kansas City Southern | 37 |
KRR
| Kiamichi | 3 |
LRS
| Laurinburg and Southern | 35 |
MDW
| Minnesota Dakota and Western Railway Com | 2 |
MEC
| Maine Central | 2 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 8 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 11 |
SIRX
| Southern Illinois Railcar Company | 1 |
SMW
| St Marys Railway West LLC | 2 |
SOU
| Southern | 1 |
SRN
| Sabine River & Northern | 13 |
WC
| Wisconsin Central | 1 |
WRWK
| Providence & Worchester Railroad | 7 |