CO
| Chesapeake & Ohio | 3 |
CSX
| CSX Railroad | 11 |
DODX
| Department Of Defense | 1 |
GPSX
| Georgia-Pacific Corporation Eastern Wood Products Mfg.Divisi | 1 |
HTTX
| TTX Company | 2 |
ITTX
| TTX Company | 1 |
JTTX
| TTX Company | 1 |
KRL
| Kasgro Rail Lines | 6 |
KWUX
| Siemens Power Corporation | 1 |
NS
| Norfolk Southern | 1 |
NW
| Norfolk & Western | 3 |
NYC
| New York Central | 1 |
PTDX
| ABB Power T and D Company Incorporated | 1 |
PTTX
| TTX Company | 1 |
QTTX
| TTX Company | 4 |
RBBX
| Ringling Bros. and Barnum and Bailey | 2 |
SBD
| Seaboard System | 3 |
SPSX
| Progress Rail Services Corp | 1 |
TBCX
| Boeing Company | 1 |
TEXX
| TEXX | 1 |
TPDX
| TPDX | 1 |
TTMX
| TTX Company | 1 |