AERC
| Albany and Eastern Railroad Company | 1 |
AGR
| Alabama and Gulf Coast | 13 |
ALM
| Arkansas Louisiana and Mississippi Railr | 5 |
AN
| Apalachicola Northern | 1 |
AOK
| Arkansas-Oklahoma Railroad | 19 |
ATW
| Atlantic and Western | 21 |
BKTY
| Union Pacific Railroad Company | 33 |
BNSF
| BNSF Railway | 107 |
CCR
| Corinth & Counce | 1 |
CNW
| Chicago & Northwestern | 1 |
COER
| Crab Orchard & Egyptian | 3 |
CPAA
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 8 |
EEC
| East Erie Commercial Railroad | 72 |
GMRC
| Green Mountain RR | 3 |
HLMX
| Helm Financial Corporation | 24 |
HS
| H and S Railroad Company | 24 |
IANR
| Iowa Northern Ry | 1 |
KCS
| Kansas City Southern | 34 |
KYLE
| Kyle Railroad | 2 |
LRS
| Laurinburg and Southern | 17 |
MDR
| Kansas City Southern | 4 |
MEC
| Maine Central | 4 |
MMA
| Montreal, Maine & Atlantic | 1 |
MNNR
| Minnesota Commercial | 2 |
MRL
| Montana Rail Link | 8 |
MSDR
| Knoxville & Holston River Railroad | 2 |
NADX
| General Electric Rail Services | 7 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NS
| Norfolk Southern | 1 |
SLR
| St Lawrence & Atlantic | 1 |
SP
| Southern Pacific | 1 |
SRN
| Sabine River & Northern | 76 |
TKEN
| Tennken Railroad Company Incorporated | 1 |
VR
| Valdosta Railway | 2 |
WC
| Wisconsin Central | 3 |
WRWK
| Providence & Worchester Railroad | 2 |