AGR
| Alabama and Gulf Coast | 3 |
ALM
| Arkansas Louisiana and Mississippi Railr | 1 |
ASAB
| Bay Line Railroad LLC | 7 |
ATW
| Atlantic and Western | 1 |
BAYL
| Bay Line, LLC | 2 |
BNSF
| BNSF Railway | 2 |
CCR
| Corinth & Counce | 1 |
CNW
| Chicago & Northwestern | 14 |
CSX
| CSX Railroad | 1 |
EEC
| East Erie Commercial Railroad | 3 |
GMRC
| Green Mountain RR | 2 |
HS
| H and S Railroad Company | 6 |
KCS
| Kansas City Southern | 3 |
KYLE
| Kyle Railroad | 1 |
LBR
| Lowville and Beaver River Railroad Compa | 3 |
MDW
| Minnesota Dakota and Western Railway Com | 2 |
MEC
| Maine Central | 8 |
MMA
| Montreal, Maine & Atlantic | 31 |
MP
| Missouri Pacific | 2 |
MRL
| Montana Rail Link | 2 |
MSDR
| Knoxville & Holston River Railroad | 2 |
MWCX
| Midwest Railcar Corporation | 1 |
NS
| Norfolk Southern | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 1 |
SRN
| Sabine River & Northern | 1 |
SSAM
| Sault Ste. Marie Bridge Company (Canadia | 1 |
TASD
| Terminal Alabama State Docks | 1 |
VR
| Valdosta Railway | 1 |
WC
| Wisconsin Central | 12 |
WCCL
| Wisconsin Central | 5 |
YB
| Youngstown Belt Railroad Company | 6 |