| A4A | Airlines for America |
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| AAAE | American Association of Airport Executives |
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| AASHO | American Association of State Highway Officials |
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| AASHTO | American Association of State Highway and Transportation Officials |
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| ACI–NA | Airports Council International–North America |
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| ACRP | Airport Cooperative Research Program |
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| ADA | Americans with Disabilities Act |
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| APTA | American Public Transportation Association |
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| ASCE | American Society of Civil Engineers |
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| ASME | American Society of Mechanical Engineers |
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| ASTM | American Society for Testing and Materials |
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| ATA | American Trucking Associations |
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| CTAA | Community Transportation Association of America |
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| CTBSSP | Commercial Truck and Bus Safety Synthesis Program |
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| DHS | Department of Homeland Security |
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| DOE | Department of Energy |
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| EPA | Environmental Protection Agency |
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| FAA | Federal Aviation Administration |
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| FAST | Fixing America’s Surface Transportation Act (2015) |
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| FHWA | Federal Highway Administration |
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| FMCSA | Federal Motor Carrier Safety Administration |
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| FRA | Federal Railroad Administration |
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| FTA | Federal Transit Administration |
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| GHSA | Governors Highway Safety Association |
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| HMCRP | Hazardous Materials Cooperative Research Program |
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| IEEE | Institute of Electrical and Electronics Engineers |
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| ISTEA | Intermodal Surface Transportation Efficiency Act of 1991 |
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| ITE | Institute of Transportation Engineers |
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| MAP-21 | Moving Ahead for Progress in the 21st Century Act (2012) |
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| NASA | National Aeronautics and Space Administration |
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| NASAO | National Association of State Aviation Officials |
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| NCFRP | National Cooperative Freight Research Program |
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| NCHRP | National Cooperative Highway Research Program |
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| NHTSA | National Highway Traffic Safety Administration |
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| NTSB | National Transportation Safety Board |
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| PHMSA | Pipeline and Hazardous Materials Safety Administration |
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| RITA | Research and Innovative Technology Administration |
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| SAE | Society of Automotive Engineers |
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| SAFETEA-LU | Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) |
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| TCRP | Transit Cooperative Research Program |
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| TEA-21 | Transportation Equity Act for the 21st Century (1998) |
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| TRB | Transportation Research Board |
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| TSA | Transportation Security Administration |
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| U.S. DOT | United States Department of Transportation |
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