ATW
| Atlantic and Western | 8 |
BM
| Boston & Maine | 4 |
BNSF
| BNSF Railway | 1 |
BVRY
| Brandywine Valley Railroad Company | 10 |
CP
| Canadian Pacific Railway | 2 |
CSS
| Chicago South Shore And South Bend | 4 |
DODX
| Department Of Defense | 1 |
ICE
| Iowa Chicago and Eastern | 1 |
LMIC
| Lake Michigan & Indiana Railroad | 100 |
MEC
| Maine Central | 1 |
NS
| Norfolk Southern | 1 |
OTTX
| TTX Company | 1 |
PTM
| Portland Terminal | 1 |
PTTX
| TTX Company | 9 |
SLR
| St Lawrence & Atlantic | 1 |
TTMX
| TTX Company | 2 |
USWX
| USA Waste Services Incorporated | 2 |
XTTX
| TTX Company | 2 |
YARR
| Youngstown and Austintown Railroad | 1 |