| Alameda Corridor (ATAX) |
STC iCUBE |
| Alaska |
Harmon Model 46, Servo 9000, STC Sentry 2058, STC SmartScan NG |
| Amtrak |
Harmon Model 32, MicroHBD CPU 3, MicroTalker CPU 3, STC SmartScan NG |
| Arkansas & Missouri |
STC SmartScan NG |
| Austin Western |
MicroTalker CPU 3 |
| BC Rail |
Harmon Model 32 |
| Bessemer & Lake Erie |
STC Sentry 2058 |
| BNSF |
Harmon Cyberscan 2000, Harmon Model 32, Harmon Model 46, MicroHBD CPU 3, MicroTalker CPU 1, MicroTalker CPU 3, STC Sentry 2100, STC Small Talk |
| Boston & Maine |
Harmon Model 46, MicroTalker CPU 1, STC Sentry 2058 |
| Buffalo & Pittsburgh |
STC SmartScan NG² |
| Burlington Northern |
Devtronics UT-1, Harmon Cyberscan 2000, Servo Servotalk (Analog), STC Sentry 2100 |
| Caltrain |
Harmon Model 46 |
| Canadian Atlantic |
Servo 9000 |
| Canadian National |
CN DHP2000, Harmon Model 75, MicroHBD CPU 3, STC Sentry 2100 |
| Canadian Pacific |
Harmon Model 75, MicroHBD CPU 1, Servo 9000, STC SmartScan NG, STC SmartScan NG² |
| Canadian Pacific Kansas City |
MicroHBD CPU 3, STC SmartScan NG² |
| CB&CNS |
Harmon Model 75 |
| Central Oregon & Pacific |
Harmon Model 46, MicroTalker CPU 1, STC Sentry 2058, STC SmartScan NG² |
| Chessie System |
Harmon Model 24, Harmon Model 75, Servo 9000, Servo 9909 |
| Chicago & North Western |
Harmon Model 32 |
| Chicago Central & Pacific |
Servo 9000 |
| Chicago Fort Wayne & Eastern |
MicroHBD CPU 1, MicroHBD CPU 3, STC Sentry 2058 |
| Coaster (NCTC) |
STC Sentry 2100 |
| Columbus & Ohio River |
STC SmartScan NG |
| Conrail |
Devtronics SCAT, Harmon Cyberscan 2000, Harmon Mini Talker-2, Harmon Model 75, Parker DED 1GG, Servo 9000, STC Small Talk |
| CSX |
CSX Talker, Devtronics 68178, Devtronics 68278, Devtronics CMA02, Devtronics MA-1, Devtronics SCAT, Devtronics TSA3000, Devtronics UT-1, Harmon Cyberscan 2000, Harmon Model 24, Harmon Model 32, Harmon Model 75, MicroHBD CPU 3, MicroTalker CPU 1, MicroTalker CPU 3, Servo 9000, Servo 9909, STC Sentry 2100, STC SmartScan NG, STC SmartScan NG², Voestalpine Phoenix MB, Voestalpine Zentrak WILD, Wabtec RailBAM |
| Delaware & Hudson |
Harmon Cyberscan 2000, Harmon Model 32, Harmon Model 46, MicroHBD CPU 1, MicroTalker CPU 1 |
| Delmarva Central |
MicroHBD CPU 3, STC Small Talk |
| Duluth Missabe & Iron Range |
Servo 9000 |
| Eastern Maine |
MicroHBD CPU 3 |
| Elgin Joliet & Eastern |
Harmon Model 75, STC Sentry 2058, STC SmartScan NG |
| Evansville Western |
MicroHBD CPU 3 |
| Florida East Coast |
Devtronics CMA02, MicroHBD CPU 3, MicroTalker CPU 3 |
| GO Transit (Metrolinx) |
MicroHBD CPU 3 |
| Goderich-Exeter |
Harmon Model 75, MicroHBD CPU 3 |
| Grand Elk |
STC SmartScan NG |
| Grand Trunk Western |
Devtronics MT-2, Harmon Model 75 |
| Guilford |
MicroHBD CPU 3, STC Sentry 2058, STC SmartScan NG |
| I&M Rail Link |
Harmon Model 75 |
| Illinois & Midland |
MicroHBD CPU 3 |
| Illinois Central |
Devtronics CMA02 |
| Indiana & Ohio |
Harmon Model 75, MicroHBD CPU 3, STC SmartScan NG |
| Iowa Chicago & Eastern |
Harmon Model 75 |
| Iowa Interstate |
STC SmartScan NG |
| Kansas City Southern |
Ensun Overlay System, MicroHBD CPU 3, MicroTalker CPU 3, STC Sentry 2058 |
| Lake State |
STC SmartScan NG |
| Lake Superior & Ishpeming |
MicroHBD CPU 3, STC SmartScan NG |
| Louisville & Indiana |
MicroHBD CPU 3 |
| Mass Coastal |
STC SmartScan NG, STC SmartScan NG² |
| MBTA |
MicroHBD CPU 3, MicroTalker CPU 3, STC Sentry 2058 |
| Metro-North |
STC iCUBE, STC SmartScan NG |
| Metrolink (SCAX) |
Harmon Model 46, MicroHBD CPU 3, STC Sentry 2058, Zukinut ZEPIC-DE |
| Missouri & Northern Arkansas |
MicroHBD CPU 3, STC Sentry 2058 |
| Missouri Pacific |
Unknown |
| Monongahela |
Harmon Mini Talker-2, Harmon Model 75, Servo 9000 |
| Montana Rail Link |
MicroHBD CPU 3, MicroTalker CPU 3 |
| New Brunswick Southern |
MicroHBD CPU 3 |
| New England Central |
STC Sentry 2100 |
| New Jersey Transit |
STC SmartScan NG |
| Norfolk & Western |
Ensun Overlay System |
| Norfolk Southern |
Devtronics CMA02, Devtronics SCAT, Ensun Overlay System, Harmon Cyberscan 2000, Harmon Model 75, MicroHBD CPU 1, MicroHBD CPU 3, MicroTalker CPU 3, Parker DED 1GG, Servo 9000, Spirit Solutions MidNight Ridir, STC Sentry 2058, STC Small Talk, STC SmartScan NG, STC SmartScan NG², Wabtec RailBAM |
| NYS&W |
Harmon Model 46, STC iCUBE, STC SmartScan NG |
| Oklahoma Kansas & Texas |
Unknown |
| Ontario Northland |
MicroHBD CPU 3, Servo 9000 |
| Ottawa Valley |
Servo 9000, STC SmartScan NG |
| Paducah & Louisville |
MicroHBD CPU 3 |
| Pan Am |
MicroHBD CPU 3, MicroTalker CPU 3, STC Sentry 2058 |
| Pittsburgh & Lake Erie |
Servo Servotalk (Digital) |
| Portland & Western |
Harmon Model 46, MicroTalker CPU 3, STC SmartScan NG |
| Providence & Worcester |
Harmon Cyberscan 2000, MicroHBD CPU 3, MicroTalker CPU 3, Servo 9000 |
| RF&P |
Devtronics CMA02 |
| Rochester & Southern |
STC SmartScan NG² |
| Saginaw Bay Southern |
Harmon Cyberscan 2000 |
| Santa Fe |
Devtronics MA-1, Harmon Cyberscan 2000, Harmon Model 32, Harmon Model 46, Servo 9000 |
| Seaboard System |
Devtronics 68178 |
| So. Cal. Railway Museum |
MicroHBD CPU 3 |
| Soo Line |
Harmon Model 75 |
| South Shore Line (NICTD) |
STC SmartScan NG, STC SmartScan NG² |
| Southern |
STC Sentry 2058 |
| Southern Pacific |
Harmon Model 46, Harmon Model 75, Servo 9000, STC Sentry 2058 |
| St. Lawrence & Atlantic |
STC SmartScan NG |
| SunRail (CFRC) |
MicroHBD CPU 3 |
| Tri-Rail (SFRTA) |
MicroHBD CPU 3, STC Sentry 2100 |
| Union Pacific |
Ensun Overlay System, Harmon Cyberscan 2000, Harmon Model 32, Harmon Model 46, Harmon Model 75, MicroHBD CPU 3, Servo 9000, STC iCUBE, STC Sentry 2058, STC SmartScan IS, STC SmartScan NG² |
| Vermont Rail System |
STC iCUBE |
| VIA Rail |
MicroHBD CPU 3 |
| Wheeling & Lake Erie |
MicroTalker CPU 1, STC SmartScan NG |
| Wisconsin Central |
STC Sentry 2058 |
| WNY&P |
STC SmartScan NG |