Associations
- Advanced Transit Association (ATRA)
- Air Transport Association (ATA)
- Airline Pilot Association (APA)
- Airport Ground Transportation Association (AGTA)
- Airports Council International (ACI)
- America's Independent Trucker's Association (AITA)
- American Association of Airport Executives (AAAE)
- American Association of Geographers (AAG)
- American Association of Motor Vehicle Administrators (AAMVA)
- American Association of Port Authorities (AAPA)
- American Association of State Highway and Transportation Officials (AASHTO)
- American Bus Association (ABA)
- American Concrete Pavement Association (ACPA)
- American Council for an Energy-Efficient Economy (ACEEE)
- American Council of Engineering Companies (ACEC)
- American Institute of Architects (AIA)
- American National Standards Institute (ANSI)
- American Pilot Association (APA)
- American Planning Association (APA)
- American Public Transportation Association (APTA)
- American Public Works Association (APWA)
- American Railway Engineering and Maintenance-of-Way Association (AREMWA)
- American Road and Transportation Builders Association (ARTBA)
- American Short Line and Regional Railroad Association (ASLRRA)
- American Society for Photogrammetry and Remote Sensing (ASPRS)
- American Society for Testing and Materials (ASTM)
- American Society of Civil Engineers (ASCE)
- American Statistical Association (ASA)
- American Traffic Safety Service Association (ATSSA)
- American Transit Services Council (ATSC)
- American Trucking Association (ATA)
- Association for Commuter Transportation (ACT)
- Association of American Railroads (AAR)
- Association of Diesel Specialists (ADS)
- Association of International Automobile Manufacturers (AIAM)
- Association of Metropolitan Planning Organizations (AMPO)
- Association of Professional Flight Attendants (APFA)
- Association of Rail Travel in the U.S. (RTUS)
- Association of Railway Museums (ARM)
- Association of Transportation Safety Information Professionals (ATSIP)
- Association for Women in Aviation Maintenance (AWAM)
- Automobile Association of America Foundation for Traffic Safety (AAAFTS)
- Bicycle Helmet Safety Institute (BHSI)
- Brotherhood of Locomotive Engineers and Trainmen (BLET)
- Brotherhood of Maintenance of Way Employees (BMWE)
- Canadian Council of Motor Transport Administrators (CCMTA)
- Canadian Institute of Traffic & Transportation (CITT)
- Canadian International Freight Forwarders Association (CIFFA)
- Canadian Renewable Fuels Association (CRFA)
- Canadian Shipowners Association (CSA)
- Canadian Society for Civil Engineering (CSCE)
- Canadian Technical Asphalt Association (CTAA)
- Canadian Urban Transit Association (CUTA)
- Center for Appropriate Transport (CAT)
- Center for Transportation Excellence (CFTE)
- Chamber of Maritime Commerce (CMC)
- Commercial Vehicle Safety Alliance (CVSA)
- Community Transportation Association of America (CTAA)
- Council of University Transportation Centers (CUTC)
- Electric Transit Vehicle Institute (ETVI)
- Electric Vehicle Association of the Americas (EVAA)
- Engine Manufacturers Association (EMA)
- Eno Transportation Foundation (ETF)
- European Asphalt Pavement Association (EAPA)
- European Parking Association (EPA)
- European Regions Airline Association (ERAA)
- European Road Transport Telematics Implementation Coordination Organization (ERTICO)
- European Sea Ports Organisation (ESPO)
- Federal Statistics (FedStats)
- Gas Technology Institute (GTI)
- Geospatial Information & Technology Association (GITA)
- High Speed Ground Transportation Association (HSGTA)
- Institute of Electrical and Electronics Engineers (IEEE)
- Institute of Mathematical Statistics (IMS)
- Institute of Transportation Engineers (ITE)
- Insurance Institute for Highway Safety (IIHS)
- Intelligent Transportation Society of America (ITSA)
- Intelligent Transportation Society of California (ITS-CA)
- Intermodal Association of North America (IANA)
- International Air Rail Organization (IARO)
- International Air Travel Association (IATA)
- International Association of Airport Executives (IAAE)
- International Association of Natural Gas Vehicles (IANGV)
- International Association of Public Transport (UITP)
- International Bridge, Tunnel and Turnpike Association (IBTTA)
- International Civil Aviation Organization (ICAO)
- International Downtown Association (IDA)
- International Maritime Organization (IMO)
- International Right of Away Association (IRWA)
- International Road Federation (IRF)
- International Organization for Standardization (ISO)
- International Statistical Institute (ISI)
- Management Association for Private Photogrammetric Surveyors (MAPPS)
- Motor Bus Society (MBS)
- National Air Traffic Controllers Association (NATCA)
- National Alliance of Highway Beautification Agencies (NAHBA)
- National Association of Counties (NAC)
- National Association of Development Organizations (NADO)
- National Association of Regional Councils (NARC)
- National Association of State Aviation Officials (NASAO)
- National Association of Truck Stop Operators (NATSO)
- National Biodiesel Board (NBB)
- National Business Aviation Association (NBAA)
- National Center for Bicycling and Walking
- National Defense Transportation Association (NDTA)
- National Governors Association (NGA)
- National League of Cities (NLC)
- National Parking Association (NPA)
- National Private Truck Council (NPTC)
- National Propane Gas Association (NPGA)
- National Safety Council (NSC)
- National School Transportation Association (NSTA)
- Natural Gas Vehicle Coalition (NGVC)
- Northeast Alternative Vehicle Consortium (NAVC)
- NorthEast Passenger Transportation Association (NEPTA)
- Open GIS Consortium (OGC)
- Portland Cement Association (PCA)
- Propane Vehicle Council (PVC)
- Railway Engineering-Maintenance Suppliers Association (REMSA)
- Railway Systems Suppliers (RSS)
- Service Technicians Society (STC)
- Society of Automotive Analysts (SAA)
- Society of Automotive Engineers (SAE)
- Statistical Society of Canada (SSC)
- Transportation Association of Canada (TAC)
- Transportation Research Board (TRB)
- Transportation Workers Union of America (TWUA)
- Travel Industry Association of America (TIA)
- United Auto Workers (UAW)
- United Motorcoach Association (UMA)
- United States Conference of Mayors (USCM)
- United Transportation Union (UTU)
- Urban and Regional Information Systems Association (URISA)
- Urban Land Institute (ULI)
- World Road Association (PIARC)