AERC
| Albany and Eastern Railroad Company | 1 |
AGR
| Alabama and Gulf Coast | 4 |
ALM
| Arkansas Louisiana and Mississippi Railr | 2 |
AOK
| Arkansas-Oklahoma Railroad | 4 |
ASAB
| Bay Line Railroad LLC | 1 |
ATW
| Atlantic and Western | 10 |
BKTY
| Union Pacific Railroad Company | 16 |
BNSF
| BNSF Railway | 2 |
CNW
| Chicago & Northwestern | 8 |
CSX
| CSX Railroad | 10 |
EEC
| East Erie Commercial Railroad | 172 |
FCRD
| First Coast Railway | 1 |
HS
| H and S Railroad Company | 50 |
KCS
| Kansas City Southern | 25 |
KRR
| Kiamichi | 1 |
LRS
| Laurinburg and Southern | 4 |
MB
| Meridian & Bigbee | 1 |
MEC
| Maine Central | 2 |
MP
| Missouri Pacific | 1 |
NOKL
| Northwestern Oklahoma | 1 |
RVPR
| Riverport R.R., L.L.C. | 1 |
SIRX
| Southern Illinois Railcar Company | 1 |
SP
| Southern Pacific | 2 |
SRN
| Sabine River & Northern | 22 |
WRWK
| Providence & Worchester Railroad | 1 |