AMTK
| Amtrak | 4 |
AOK
| Arkansas-Oklahoma Railroad | 4 |
BBCX
| ABB Power Generation Incorporated | 2 |
BTCX
| Browner Turnout Company | 3 |
CN
| Canadian National Railways | 3 |
CNW
| Chicago & Northwestern | 1 |
COER
| Crab Orchard & Egyptian | 6 |
CP
| Canadian Pacific Railway | 53 |
CTXX
| CTXX | 5 |
CW
| Colorado and Wyoming | 1 |
CWMX
| Chemical Waste Management Incorporated | 1 |
DODX
| Department Of Defense | 1 |
FALX
| Falk Corporation | 1 |
GEX
| General Electric Company | 2 |
GIMX
| General American Marks Company | 11 |
HCMX
| Harnischfeger CCorporation | 1 |
HKRX
| HKRX | 2 |
HTTX
| TTX Company | 5 |
ICE
| Iowa Chicago and Eastern | 6 |
ITTX
| TTX Company | 3 |
JTTX
| TTX Company | 2 |
KRL
| Kasgro Rail Lines | 20 |
LMIC
| Lake Michigan & Indiana Railroad | 1 |
LTTX
| TTX Company | 4 |
MCRY
| MCRY | 1 |
MILW
| Milwaukee Road | 14 |
MP
| Missouri Pacific | 21 |
MSTL
| Minneapolis & St Louis | 8 |
MTTX
| TTX Company | 3 |
NREX
| National Railway Equipment | 3 |
OTTX
| TTX Company | 1 |
PHMX
| P&H Mining Equipment | 54 |
PTTX
| TTX Company | 14 |
QTTX
| TTX Company | 16 |
RAIX
| Union Carbide Corporation | 1 |
SJTX
| Stella Jones, Inc | 1 |
SOO
| Soo Line | 18 |
SP
| Southern Pacific | 1 |
SPSX
| Progress Rail Services Corp | 1 |
TEXX
| TEXX | 3 |
TTXX
| TTX Company | 1 |
TZPR
| Tazewell & Peoria Railroad | 3 |
UP
| Union Pacific Railroad Company | 13 |
VSR
| Valley & Siletz RR | 3 |
WSOR
| Wisconsin & Southern | 6 |
XTTX
| TTX Company | 3 |