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AASHO American Association of State Highway Offi cials AASHTO American Association of State Highway and Transportation Offi cials 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 IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Effi ciency Act of 1991 ITE Institute of Transportation Engineers NASA National Aeronautics and Space Administration NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffi c Safety Administration NTSB National Transportation Safety Board SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Effi cient 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 Acronyms Abbreviations and acronyms used without defi nitions in TRB publications:
Transportation Research Board 500 Fifth Street, N W W ashington, D C 20001
