AGR
| Alabama and Gulf Coast | 2 |
ANR
| Angelina and Neches River Railroad | 3 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
ATW
| Atlantic and Western | 3 |
BAYL
| Bay Line, LLC | 1 |
BKTY
| Union Pacific Railroad Company | 5 |
BM
| Boston & Maine | 1 |
BNSF
| BNSF Railway | 1 |
COER
| Crab Orchard & Egyptian | 1 |
CRLE
| Coe Rail Incorporated | 1 |
CSX
| CSX Railroad | 1 |
DWC
| Canadian National Railways | 1 |
EEC
| East Erie Commercial Railroad | 3 |
GNWR
| Genesee and Wyoming Railroad Company | 2 |
GTRA
| Golden Triangle Railroad | 3 |
HS
| H and S Railroad Company | 2 |
IANR
| Iowa Northern Ry | 3 |
IATR
| Iowa Traction Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 3 |
LC
| Lancaster & Chester | 4 |
LRS
| Laurinburg and Southern | 5 |
MB
| Meridian & Bigbee | 2 |
MDW
| Minnesota Dakota and Western Railway Com | 1 |
MEC
| Maine Central | 2 |
MSDR
| Knoxville & Holston River Railroad | 2 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 2 |
NS
| Norfolk Southern | 25 |
OAR
| Old Augusta Railroad | 1 |
RBOX
| Railbox Company | 3 |
SLGG
| Progress Rail Services Corporation | 1 |
SMW
| St Marys Railway West LLC | 1 |
SNC
| Saratoga & North Creek Railway | 3 |
SOU
| Southern | 40 |
SP
| Southern Pacific | 1 |
TBOX
| TTX Company | 1 |
TR
| Tomahawk Railway L.P. | 8 |
UCRY
| Utah Central | 2 |
WCOR
| Wellsboro and Corning Railroad Company | 1 |
WRWK
| Providence & Worchester Railroad | 4 |