AERC
| Albany and Eastern Railroad Company | 100 |
AGR
| Alabama and Gulf Coast | 5 |
AM
| Arkansas & Missouri | 1 |
AN
| Apalachicola Northern | 3 |
AOK
| Arkansas-Oklahoma Railroad | 5 |
ATW
| Atlantic and Western | 2 |
BAYL
| Bay Line, LLC | 1 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 7 |
BNSF
| BNSF Railway | 20 |
CAGY
| Columbus & Greenville Railway | 1 |
CEFX
| CIT Group/Capital Finance, Inc | 1 |
CHTT
| Chicago Heights Terminal Transfer | 1 |
CIRR
| Chattahoochee Industrial Railroad | 1 |
CLC
| Columbia and Cowlitz Railway Company | 1 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 18 |
CP
| Canadian Pacific Railway | 13 |
CRLE
| Coe Rail Incorporated | 1 |
CSX
| CSX Railroad | 5 |
DRGW
| Denver & Rio Grande Western | 4 |
EEC
| East Erie Commercial Railroad | 30 |
ELS
| Escanaba and Lake Superior Railroad Comp | 1 |
FBOX
| TTX Company | 32 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FURX
| First Union Rail | 1 |
FXE
| Ferromex | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 4 |
GTW
| Grand Trunk Western | 1 |
GVSR
| Galveston Railroad L.P. | 4 |
HCGX
| COMPASS MINERALS INTERNATIONAL INC | 4 |
HS
| H and S Railroad Company | 10 |
IBT
| International Bridge and Terminal Company | 9 |
IC
| Illinois Central | 2 |
LW
| Louisville and Wadley Railway Company | 1 |
MDW
| Minnesota Dakota and Western Railway Com | 2 |
MEC
| Maine Central | 1 |
MILW
| Milwaukee Road | 2 |
MP
| Missouri Pacific | 4 |
MRL
| Montana Rail Link | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 4 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 1 |
PSMX
| Esco Corporation | 3 |
RBOX
| Railbox Company | 7 |
SLC
| San Luis Central Railroad Company | 2 |
SP
| Southern Pacific | 75 |
SRN
| Sabine River & Northern | 2 |
SRY
| Southern Railway of British Columbia Lim | 7 |
SSW
| St Louis Southwestern (Cotton Belt) | 35 |
TBOX
| TTX Company | 8 |
TKEN
| Tennken Railroad Company Incorporated | 4 |
TR
| Tomahawk Railway L.P. | 2 |
UP
| Union Pacific Railroad Company | 11 |
VCY
| Galveston Railroad, L.P. | 1 |
WC
| Wisconsin Central | 2 |
WCCL
| Wisconsin Central | 3 |
WLO
| Waterloo Railway Company (Illinois Central) | 3 |
WP
| Western Pacific | 5 |
WREX
| Western Railroad Equipment Company | 1 |