BNSF
| BNSF Railway | 1 |
BTCX
| Browner Turnout Company | 6 |
CN
| Canadian National Railways | 1 |
CP
| Canadian Pacific Railway | 3 |
CW
| Colorado and Wyoming | 1 |
FTTX
| TTX Company | 3 |
LMIC
| Lake Michigan & Indiana Railroad | 1 |
PTTX
| TTX Company | 6 |
QTTX
| TTX Company | 1 |
RTTX
| TTX Company | 1 |