Clients include:

• Amtrak
• Atlanta Streetcar
• Baltimore Metropolitan Council
• Bi-State Development Agency: MetroLink Light Rail (St. Louis, MO)
• Caltrain
• Champaign-Urbana Mass Transit District
• Charlotte Area Transit System (CATS-Charlotte, NC)
• Cincinnati Streetcar
• Citrus Connection, Lakeland, Florida
• City of Quantico, VA
• DC Streetcar (Washington, DC)
• Delaware River Port Authority
• Detroit Streetcar
• Egyptian National Railways
• Georgia Emergency Management Agency
• Federal Highway Administration
• Federal Transit Administration
• Florida Department of Transportation
• Greater Cleveland Regional Transit Authority (GCRTA)
• HARTline TECO Historic Streetcar System
• Herzog, Inc. Tri-Rail Commuter Rail (Miami, FL)
• Houston Metro
• Jacksonville Transit Authority Skyway AGV Rail System
• Los Angeles MTA
• LYNX Transit System, Orlando, FL
• Mass Transportation Administration of Maryland:
• • Commuter Rail
  • Light Rail
  • Metrorail
  • Paratransit
  • Transit Bus
• Memphis Area Transit Authority
• Metropolitan Atlanta Rapid Transit Authority (MARTA)
• National Transportation Institute at Rutgers University, New Brunswick, NJ
• New York State DOT
• New Orleans Regional Transit Authority (NO RTA) Streetcar System
• Potomac and Rappahannock Transportation Commission
• Regional Transit District of Denver, CO: Light Rail System
• Rockland County, NY (TRIPS-TOR systems)
• Southern California Regional Rail Authority: Metrolink Commuter Rail System (Los Angeles, CA)
• Southeastern Pennsylvania Transportation Authority (SEPTA-Philadelphia, PA)
• Texas DOT
• Transdev
• Transportation Cooperative Research Program (TCRP)
• Transportation Safety Institute (TSI)
• Tri-Met, Portland, OR
• USDOT
• Virginia Department of Rail and Public Transportation
• Virginia Railway Express: Commuter Rail (Washington, DC area)
• Washington, DC Metropolitan Area Council of Governments (MWCOG)
• Washington Metropolitan Area Transit Authority (WMATA)
• Westchester County, NY Bee-Line