Freight Rail

• Canadian National Railway
• Canadian Pacific Railway
• CSX Transportation
• Florida East Coast Railway
• Kowloon-Canton Railway Corporation
• Norfolk Southern Corporation

Passenger Rail

• Caltrain
• Long Island Rail Road
• Massachusetts Bay Transportation Authority
• Metro-North Railroad
• NJ Transit Rail Operations
• National Railroad Passenger Corp. (Amtrak)
• Northeast Illinois Commuter Railroad Corp. (METRA)
• Northern Indiana Commuter Rail District (NICTD)
• Southeastern Pennsylvania Transportation Authority (SEPTA)

Rail Transit

• Central Florida Department of Transportation
• Greater Cleveland Regional Transit Authority
• Hillsborough Area Regional Transit (HARTline)
• Istanbul Ulasim
• Kowloon-Canton Railway Corporation
• Lille Tramway
• Los Angeles County Metropolitan Transportation Authority
• LYNX (Orlando, Florida)
• Massachusetts Bay Transportation Authority
• Metro de Santiago (Chile)
• MTA Maryland: MARC Train Service
• NJ Transit Newark City Subway
• New York City Transit
• Port Authority of Allegheny County
• Port Authority Trans Hudson (PATH)
• Port Authority Transit Corporation (PATCO)
• San Diego Trolley, Inc. (MTDB/SDTI)
• Shanghai Metro
• Singapore Land Transport Authority
• Societe de Transport de Montreal
• Southeastern Pennsylvania Transportation Authority (SEPTA)
• Sacramento Regional Transit District
• Staten Island Railway
• Toronto Transit Commission
• Washington Metropolitan Area Transit Authority (WMATA)

Consulting Firms

• Bechtel Infrastructure, Inc.
• Delcan
• Dewberry
• DMJM Harris
• Earth Tech (a TYCO International Ltd. Company)
• Edwards & Kelcey, Inc.
• GANCOM (a division of Gannett Fleming)
• Maunsell | AECOM
• Henningson, Durham & Richardson Architecture & Engineering P.C. (HDR)
• IBI Group
• J. R. Loumiet & Associates
• MK Centennial
• Parsons Brinckerhoff
• SNC Lavalin
• Systemwide Pty, Ltd.
• TranSystems Corporation
• T.Y. Lin/BASCOR, Inc.
• UMA | AECOM
• URS Greiner
• Vanasse Hangen Brustlin, Inc. (VHB)
• Vollmer
• Washington Infrastructure Group / Dulles Transit Partners
• Wilbur Smith Associates

Systems Suppliers and Integrators

• ALSTOM Signaling, Inc.
• General Electric Transportation Systems Global Signaling (GETS GS)
• General Railway Signal
• Harris Corporation
• Safetran, an Invensys Company
• Union Switch & Signal, Inc.

Government, Educational and Non-Profit Agencies

• Delaware Department of Transportation
• Federal Transit Administration (FTA)
• Georgia Department of Transportation
• HanYang University
• Illinois Institute of Technology Research Institute
• Metropolitan Transit Development Board (San Diego)
• Metropolitan Transportation Authority of New York
• New York State Department of Transportation
• San Mateo County Transit (SAMTRANS)