AOK
| Arkansas-Oklahoma Railroad | 3 |
APTX
| Air Products and Chemicals Incorporated | 4 |
BNSF
| BNSF Railway | 4 |
CN
| Canadian National Railways | 5 |
CP
| Canadian Pacific Railway | 1 |
DL
| Delaware-Lackawanna Railroad Company | 2 |
FTTX
| TTX Company | 1 |
FURX
| First Union Rail | 1 |
HTTX
| TTX Company | 5 |
ICE
| Iowa Chicago and Eastern | 1 |
KRL
| Kasgro Rail Lines | 2 |
KWUX
| Siemens Power Corporation | 6 |
MCVX
| Massuchusetts Call/Volunteer Firefighters Assoc. | 3 |
MP
| Missouri Pacific | 1 |
OTTX
| TTX Company | 1 |
PTTX
| TTX Company | 5 |
QTTX
| TTX Company | 5 |
SOO
| Soo Line | 1 |
TPDX
| TPDX | 1 |
TZPR
| Tazewell & Peoria Railroad | 4 |
UP
| Union Pacific Railroad Company | 1 |
XTTX
| TTX Company | 1 |