Organizations

Independent
- Association of American Railroads
  - Transportation Technology Center, Inc.
- American Automobile Association
- American Highway Users Alliance
- Los Angeles County Bicycle Coalition
  - http://www.la-bike.org
- Car 2 Car Communication Consortium
  - https://www.car-2-car.org
- American Railway Engineering and Maintenance-of-Way Association
  - https://www.arema.org
Government
- United States
  - Department of Transportation
    - Federal Railroad Administration
  - National Transportation Safety Board
  - Transportation Security Administration
  - Federal Bureau of Investigation
  - United States Environmental Protection Agency
  - State
    - Department of Transportation
    - Department of Motor Vehicles
    - State Environmental Protection Agency