ABOX
| TTX Company | 4 |
AERC
| Albany and Eastern Railroad Company | 2 |
AGR
| Alabama and Gulf Coast | 7 |
AN
| Apalachicola Northern | 1 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 6 |
ATW
| Atlantic and Western | 6 |
BAEX
| Andersons | 1 |
BAR
| Bangor & Aroostook | 6 |
BCOL
| Canadian National Railways | 1 |
BFBX
| Bakery Feeds, Division of Griffin Indust | 1 |
BM
| Boston & Maine | 4 |
BN
| Burlington Northern | 5 |
BNSF
| BNSF Railway | 19 |
CCR
| Corinth & Counce | 1 |
CLC
| Columbia and Cowlitz Railway Company | 1 |
CMHX
| CarMath Incorporated | 1 |
CN
| Canadian National Railways | 3 |
CNA
| Canadian National Railways | 1 |
CNIS
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 4 |
CP
| Canadian Pacific Railway | 4 |
CPAA
| Canadian Pacific Railway | 2 |
CR
| Conrail | 16 |
CSX
| CSX Railroad | 24 |
CVC
| Canadian National Railways | 9 |
DRGW
| Denver & Rio Grande Western | 2 |
DTI
| Detroit Toledo & Ironton | 1 |
DWC
| Canadian National Railways | 5 |
EEC
| East Erie Commercial Railroad | 17 |
ELS
| Escanaba and Lake Superior Railroad Comp | 1 |
FBOX
| TTX Company | 2 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FGLK
| Finger Lakes Railway | 4 |
FSRR
| FerroSur | 1 |
FXE
| Ferromex | 1 |
GFRR
| Georgia and Florida Railnet | 1 |
GMRC
| Green Mountain RR | 5 |
GTW
| Grand Trunk Western | 2 |
HPJX
| Helm-Pacific Leasing | 1 |
HS
| H and S Railroad Company | 6 |
IATR
| Iowa Traction Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 1 |
IC
| Illinois Central | 2 |
ICG
| Illinois Central Gulf | 1 |
KCS
| Kansas City Southern | 2 |
KELX
| Kellogg Company | 2 |
LC
| Lancaster & Chester | 1 |
MDR
| Kansas City Southern | 1 |
MDW
| Minnesota Dakota and Western Railway Com | 1 |
MEC
| Maine Central | 10 |
MILW
| Milwaukee Road | 3 |
MP
| Missouri Pacific | 4 |
MRL
| Montana Rail Link | 1 |
MSDR
| Knoxville & Holston River Railroad | 1 |
MSE
| Mississippi Export Railroad Company | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 3 |
NYC
| New York Central | 15 |
ONT
| Ontario Northland Railway | 1 |
PDRR
| Pee Dee River RR | 1 |
QGRY
| Quebec Gatineau Railway Incorporated | 5 |
RBOX
| Railbox Company | 13 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 1 |
SIRX
| Southern Illinois Railcar Company | 1 |
SLGG
| Progress Rail Services Corporation | 1 |
SOO
| Soo Line | 1 |
SP
| Southern Pacific | 6 |
SRN
| Sabine River & Northern | 3 |
SRY
| Southern Railway of British Columbia Lim | 1 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 3 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
STMA
| St. Maries River Railroad Company | 1 |
TASD
| Terminal Alabama State Docks | 3 |
TBOX
| TTX Company | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 2 |
TR
| Tomahawk Railway L.P. | 1 |
UP
| Union Pacific Railroad Company | 5 |
WLO
| Waterloo Railway Company (Illinois Central) | 2 |
WP
| Western Pacific | 2 |
YARR
| Youngstown and Austintown Railroad | 1 |