ABOX
| TTX Company | 1 |
AGR
| Alabama and Gulf Coast | 2 |
AMC
| Arkansas Louisiana and Mississippi Railr | 1 |
ATW
| Atlantic and Western | 1 |
BAR
| Bangor & Aroostook | 2 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 2 |
BR
| Buffalo and Pittsburgh | 1 |
BTN
| BTN | 1 |
CCR
| Corinth & Counce | 1 |
CEMX
| Cemex Mexico SA de CV | 1 |
CNW
| Chicago & Northwestern | 3 |
CRIP
| Chicago Rock Island & Pacific | 1 |
CSX
| CSX Railroad | 3 |
DRGW
| Denver & Rio Grande Western | 4 |
FBOX
| TTX Company | 3 |
FP
| Fordyce & Princeton Railroad Company | 1 |
FXE
| Ferromex | 6 |
GNWR
| Genesee and Wyoming Railroad Company | 1 |
HS
| H and S Railroad Company | 9 |
IBT
| International Bridge and Terminal Company | 4 |
KCS
| Kansas City Southern | 4 |
KRR
| Kiamichi | 1 |
LRRE
| LRRE | 1 |
MDW
| Minnesota Dakota and Western Railway Com | 3 |
MEC
| Maine Central | 1 |
MP
| Missouri Pacific | 3 |
MRL
| Montana Rail Link | 1 |
MSRC
| Kansas City Southern | 2 |
MWCX
| Midwest Railcar Corporation | 1 |
NAR
| Northern Alberta Railways | 1 |
NLG
| Kansas City Southern Railway Company (North Louisiana & Gulf) | 1 |
NS
| Norfolk Southern | 2 |
NW
| Norfolk & Western | 1 |
RBOX
| Railbox Company | 4 |
RGCX
| Rio Grande Chemical LTD | 1 |
RJCM
| R.J. Corman Railroad Company/ Memphis Li | 1 |
RSP
| Roscoe Snyder and Pacific Railway | 1 |
SOU
| Southern | 4 |
SP
| Southern Pacific | 1 |
SRN
| Sabine River & Northern | 2 |
SRY
| Southern Railway of British Columbia Lim | 1 |
STE
| Stockton Terminal and Eastern RR | 2 |
TR
| Tomahawk Railway L.P. | 2 |
WC
| Wisconsin Central | 2 |
WP
| Western Pacific | 1 |