BLE
| Bessemer & Lake Erie | 1 |
CAAX
| MHC Incorporated Subsidiary of ConAgra Incorporated | 1 |
CR
| Conrail | 3 |
CSX
| CSX Railroad | 39 |
GCCX
| General American Marks Company | 2 |
IC
| Illinois Central | 1 |
MWAX
| Martin Marietta Materials Incorporated | 2 |
NS
| Norfolk Southern | 32 |
NW
| Norfolk & Western | 12 |
PSR
| Pittsburg and Shawmut Railroad Incorporated | 1 |
RBMN
| Reading Blue Mountain & Northern | 2 |
SOO
| Soo Line | 6 |
SOU
| Southern | 5 |
TRAX
| RailAmerica | 1 |