AERC
| Albany and Eastern Railroad Company | 1 |
ALM
| Arkansas Louisiana and Mississippi Railr | 1 |
AOK
| Arkansas-Oklahoma Railroad | 6 |
ATSF
| Atchison Topeka & Santa Fe | 16 |
ATW
| Atlantic and Western | 2 |
BCOL
| Canadian National Railways | 3 |
BN
| Burlington Northern | 5 |
BNSF
| BNSF Railway | 59 |
CIC
| Cedar Rapids & Iowa City | 10 |
CLC
| Columbia and Cowlitz Railway Company | 9 |
CMHX
| CarMath Incorporated | 1 |
CN
| Canadian National Railways | 11 |
CNA
| Canadian National Railways | 9 |
CRLE
| Coe Rail Incorporated | 12 |
CSX
| CSX Railroad | 4 |
EEC
| East Erie Commercial Railroad | 1 |
ELS
| Escanaba and Lake Superior Railroad Comp | 7 |
FBOX
| TTX Company | 2 |
HLMX
| Helm Financial Corporation | 12 |
HS
| H and S Railroad Company | 5 |
IATR
| Iowa Traction Railroad Company | 15 |
IC
| Illinois Central | 1 |
ICG
| Illinois Central Gulf | 1 |
KCS
| Kansas City Southern | 2 |
LNAC
| Chattahoochee Bay Railroad, LLC | 4 |
LSRC
| Lake State Railway Company | 1 |
LW
| Louisville and Wadley Railway Company | 4 |
MR
| McCloud Railway Company | 1 |
MRL
| Montana Rail Link | 3 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 4 |
NOKL
| Northwestern Oklahoma | 5 |
NS
| Norfolk Southern | 1 |
ONT
| Ontario Northland Railway | 1 |
PLTX
| Potlatch Corporation | 2 |
RBOX
| Railbox Company | 3 |
SFLC
| BNSF Railway | 4 |
SLGG
| Progress Rail Services Corporation | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 2 |
SRN
| Sabine River & Northern | 7 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 3 |
TBOX
| TTX Company | 12 |
TOE
| Texas Oklahoma and Eastern RR Company | 4 |
TR
| Tomahawk Railway L.P. | 1 |
WC
| Wisconsin Central | 24 |
WCCL
| Wisconsin Central | 4 |
WE
| Wheeling & Lake Erie | 2 |