ALT
| AIRLAKE TERMINAL RAILWAY COMPANY | 1 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ARR
| Alaska Railroad | 7 |
ATTX
| TTX Company - Container Flats | 1 |
BNSF
| BNSF Railway | 3 |
DODX
| Department Of Defense | 109 |
FRR
| Falls Road Railroad Company Incorporated | 2 |
HTTX
| TTX Company | 73 |
HTX
| HTX | 1 |
JTTX
| TTX Company | 2 |
MP
| Missouri Pacific | 6 |
MTTX
| TTX Company | 92 |
OTTX
| TTX Company | 343 |
PGR
| Progressive Rail, Inc | 1 |
QTTX
| TTX Company | 1 |
SOU
| Southern | 2 |
TPAX
| TPAX | 1 |
TPDX
| TPDX | 1 |
TTHX
| TTX Company - Flat Cars | 91 |
TTMX
| TTX Company | 16 |
UP
| Union Pacific Railroad Company | 11 |