BN
| Burlington Northern | 2 |
CW
| Colorado and Wyoming | 1 |
FEC
| Florida East Coast | 1 |
HTTX
| TTX Company | 1 |
KRL
| Kasgro Rail Lines | 2 |
MP
| Missouri Pacific | 2 |
MTTX
| TTX Company | 1 |
PHMX
| P&H Mining Equipment | 1 |
PTTX
| TTX Company | 4 |
QTTX
| TTX Company | 1 |
RTIX
| RTI - Railroad Services | 1 |
RTTX
| TTX Company | 1 |
UP
| Union Pacific Railroad Company | 4 |
VTTX
| TTX Company | 1 |