BTCX
| Browner Turnout Company | 1 |
CP
| Canadian Pacific Railway | 1 |
CSX
| CSX Railroad | 1 |
DODX
| Department Of Defense | 2 |
GIMX
| General American Marks Company | 4 |
ITTX
| TTX Company | 5 |
KRL
| Kasgro Rail Lines | 2 |
LMIC
| Lake Michigan & Indiana Railroad | 1 |
MTTX
| TTX Company | 7 |
NW
| Norfolk & Western | 3 |
PTTX
| TTX Company | 2 |
QTTX
| TTX Company | 9 |
QUAX
| Redstreak, LLC | 1 |
RBBX
| Ringling Bros. and Barnum and Bailey | 2 |
SOU
| Southern | 1 |
TTJX
| TTX Company-Bulkhead Flats | 1 |
TTOX
| TTX Company | 1 |
XTTX
| TTX Company | 2 |