ABOX
| TTX Company | 1 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
ATW
| Atlantic and Western | 3 |
BKTY
| Union Pacific Railroad Company | 21 |
BNSF
| BNSF Railway | 15 |
CMHX
| CarMath Incorporated | 2 |
CNA
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 1 |
COER
| Crab Orchard & Egyptian | 5 |
CP
| Canadian Pacific Railway | 6 |
CSX
| CSX Railroad | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
DWC
| Canadian National Railways | 1 |
EEC
| East Erie Commercial Railroad | 2 |
FBOX
| TTX Company | 3 |
FSRR
| FerroSur | 2 |
GACX
| General American Marks Company | 1 |
HS
| H and S Railroad Company | 4 |
IBT
| International Bridge and Terminal Company | 1 |
ITFX
| INFINITY TRANSPORTATION III LLC | 5 |
J
| J | 4 |
KCS
| Kansas City Southern | 8 |
KYLE
| Kyle Railroad | 3 |
LRS
| Laurinburg and Southern | 3 |
LW
| Louisville and Wadley Railway Company | 3 |
MDW
| Minnesota Dakota and Western Railway Com | 8 |
MKT
| Missouri-Kansas-Texas | 1 |
MP
| Missouri Pacific | 5 |
NOKL
| Northwestern Oklahoma | 1 |
NS
| Norfolk Southern | 5 |
RBOX
| Railbox Company | 8 |
SLC
| San Luis Central Railroad Company | 2 |
SOU
| Southern | 12 |
SP
| Southern Pacific | 13 |
SRN
| Sabine River & Northern | 1 |
SRY
| Southern Railway of British Columbia Lim | 10 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
TASD
| Terminal Alabama State Docks | 1 |
TBOX
| TTX Company | 6 |
TOE
| Texas Oklahoma and Eastern RR Company | 1 |
TR
| Tomahawk Railway L.P. | 1 |
UP
| Union Pacific Railroad Company | 1 |
UPP
| Union Pacific Passenger | 1 |
WP
| Western Pacific | 6 |
WRWK
| Providence & Worchester Railroad | 8 |