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60 List of Abbreviations, Acronyms, and Initialisms AC Alternating current ADA Americans with Disabilities Act ASE National Institute for Automotive Service Excellence ATC Automatic train control ATO Automatic train operation ATP Automatic train protection ATU Amalgamated Transit Union CBTC Computer-based train control CMS Credential management system CTAA Community Transportation Association of America DC Direct current DOT Department of transportation GCRTA Greater Cleveland Regional Transit Authority JATC Joint Apprenticeship and Training Committee HVAC Heating, ventilation, and air conditioning IBT Internet-based testing IBEW International Brotherhood of Electrical Workers ISD Instructional system design LACMTA Los Angeles County Metropolitan Transportation Authority LRV Light rail vehicle MARTA Metropolitan Atlanta Rapid Transit Authority MDBF Mean distance between failures MBTA Massachusetts Bay Transportation Authority NJATC National Joint Apprenticeship and Training Committee NTI National Transit Institute NYCT New York City Transit OEM Original equipment manufacturer PPE Personal protective equipment RATP Paris Regional Transit System RTD Denver Regional Transit District ROI Return on Investment SacRT Sacramento Regional Transit SEPTA Southeastern Pennsylvania Transportation Authority SME Subject matter expert TriMet Tri-County Metropolitan Transportation District TTN Transit Training Network TWU Transport Workers Union UTA Utah Transit Authority VTA Santa Clara Valley Transportation Authority
Abbreviations and acronyms used without deï¬nitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACIâNA Airports Council InternationalâNorth America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) TCRP Transit Cooperative Research Program TEA-21 Transportation Equity Act for the 21st Century (1998) TRB Transportation Research Board TSA Transportation Security Administration U.S.DOT United States Department of Transportation