ARTX
| Artrain | 1 |
BLE
| Bessemer & Lake Erie | 1 |
BN
| Burlington Northern | 11 |
BO
| Baltimore & Ohio | 1 |
CLC
| Columbia and Cowlitz Railway Company | 5 |
CO
| Chesapeake & Ohio | 3 |
CP
| Canadian Pacific Railway | 2 |
CR
| Conrail | 3 |
CSX
| CSX Railroad | 6 |
DL
| Delaware-Lackawanna Railroad Company | 1 |
MGA
| Monongahela RR | 1 |
MNRR
| Modoc Northern Railroad Company | 3 |
MRL
| Montana Rail Link | 8 |
OHCR
| Ohio Central | 3 |
OHIC
| Ohi-Rail Corporation | 3 |
PLE
| Pittsburgh & Lake Erie | 1 |
PNWR
| Portland and Western Railroad Incorporat | 1 |
POTB
| Port of Tillamook Bay | 1 |
PWV
| Pittsburgh & West Virginia | 1 |
RBMN
| Reading Blue Mountain & Northern | 1 |
SBVR
| South Branch Valley Rail Road | 1 |
SP
| Southern Pacific | 3 |
STMA
| St. Maries River Railroad Company | 2 |
UP
| Union Pacific Railroad Company | 5 |
WE
| Wheeling & Lake Erie | 2 |
WLE
| WLE | 3 |
WPRR
| Willamette and Pacific | 5 |
WTCX
| Weyerhauser | 2 |