- AAA Foundation for Traffic Safety
 - Nonprofit research and education organization. - Air Transport Association
- Trade organization for U.S. airlines.
- AirportNet - American Association of Airport Executives
- Alexandria - Dedicated to providing services to the individual professionals in airport management.
- American Association of Private Railroad Car Owners
- Nonprofit body of current and potential passenger car owners.
- Dulles Area Transportation Association
- Chantilly - Voice for transportation in the greater Dulles area.
- Dulles Corridor Rail Association
- Reston - Nonprofit membership organization formed to advocate rail in the Dulles Corridor.
- Institute of Transportation Engineers
- Legislative and regulatory information, employment opportunities, transportation news and events.
- Intelligent Transportation Society of America
- Congressionally mandated repository for the latest and historical smart car, smart highway and smart transit information.
- International Bridge, Tunnel & Turnpike Association
- An international trade association serving the operators of toll roads, bridges and tunnels.
- ITS Virginia
- Annandale
- National Association of Railroad Passengers
- Promotes passenger trains as a safe, comfortable, energy-efficient, environmentally sound form of travel.
- National Partnership for Highway Quality
- Dedicated to continuous quality improvement in the planning, design, construction, and maintenance of U.S. highways.
- Network of Employers for Traffic Safety
- Aims to help employers develop and implement workplace highway safety programs.
- Regional Airline Association (RAA)
- Represents U.S. regional airlines and the suppliers of products and services that support the industry, before U.S. federal and state agencies.
- Stop the Inter County Connector
|