Government Customers
- U.S. DOT Federal Railroad Administration (FRA)
- U.S. DOT Federal Transit Administration (FTA)
- Transportation Security Administration (TSA)
Commercial Customers
- Alstom
- Amtrak
- BNSF
- Caltrain
- Canadian National
- Canadian Pacific
- CSX Transportation
- Geismar
- Genesee & Wyoming
- Harsco
- Herzog
- Kansas City Southern
- Kawasaki
- Long Island Rail Road
- Maryland Area Regional Commuter (MARC)
- Massachusetts Bay Transportation Authority (MBTA)
- Metro North
- Metrolink
- Metropolitan Atlanta Rapid Transit Authority (MARTA)
- Miami-Dade Transit
- New Jersey Transit
- Norfolk Southern
- North County Transit District
- OmniTRAX
- Ontario Northland
- Plasser American
- Port Authority of Allegheny County (PAAC)
- Port Authority Trans-Hudson (PATH)
- SunRail
- Union Pacific
- Washington Metropolitan Area Transit Authority (WMATA)