ABOX
| TTX Company | 1 |
AGR
| Alabama and Gulf Coast | 3 |
AOK
| Arkansas-Oklahoma Railroad | 3 |
ATW
| Atlantic and Western | 2 |
BNSF
| BNSF Railway | 1 |
CLC
| Columbia and Cowlitz Railway Company | 5 |
CN
| Canadian National Railways | 1 |
CNA
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 1 |
CR
| Conrail | 2 |
CRDX
| Chicago Freight Car Leasing Company | 1 |
CRLE
| Coe Rail Incorporated | 2 |
CSX
| CSX Railroad | 1 |
GVSR
| Galveston Railroad L.P. | 1 |
IC
| Illinois Central | 2 |
KCS
| Kansas City Southern | 4 |
MDR
| Kansas City Southern | 1 |
NOKL
| Northwestern Oklahoma | 6 |
NS
| Norfolk Southern | 7 |
QOCX
| Quaker Oats Company | 1 |
RBOX
| Railbox Company | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 1 |
SRN
| Sabine River & Northern | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 11 |
WAB
| Wabash | 3 |
WCCL
| Wisconsin Central | 2 |