ABOX
| TTX Company | 4 |
AGR
| Alabama and Gulf Coast | 1 |
AKMD
| Arkansas Midland Railroad Company | 1 |
ALM
| Arkansas Louisiana and Mississippi Railr | 2 |
AN
| Apalachicola Northern | 1 |
ASAB
| Bay Line Railroad LLC | 1 |
BNSF
| BNSF Railway | 2 |
BO
| Baltimore & Ohio | 2 |
CIRR
| Chattahoochee Industrial Railroad | 1 |
CMHX
| CarMath Incorporated | 1 |
CO
| Chesapeake & Ohio | 2 |
CR
| Conrail | 3 |
CSX
| CSX Railroad | 88 |
EEC
| East Erie Commercial Railroad | 2 |
FBOX
| TTX Company | 5 |
HPJX
| Helm-Pacific Leasing | 1 |
ICG
| Illinois Central Gulf | 1 |
KCS
| Kansas City Southern | 2 |
MEC
| Maine Central | 2 |
MP
| Missouri Pacific | 1 |
MQT
| Marquette Rail | 1 |
NDYX
| First Union Rail | 1 |
NS
| Norfolk Southern | 11 |
NSHR
| North Shore | 1 |
NWR
| Nashville & Western Railroad Corp. | 1 |
NYC
| New York Central | 4 |
PAL
| Paducah & Louisville | 1 |
QGRY
| Quebec Gatineau Railway Incorporated | 3 |
RBOX
| Railbox Company | 9 |
SLGG
| Progress Rail Services Corporation | 1 |
SLR
| St Lawrence & Atlantic | 1 |
SOU
| Southern | 32 |
SP
| Southern Pacific | 3 |
TBOX
| TTX Company | 1 |
TR
| Tomahawk Railway L.P. | 1 |
WC
| Wisconsin Central | 3 |
WP
| Western Pacific | 1 |