Federal Government
National and International Organizations
- American Public Transportation Association (APTA)
- Association of American Railroads (AAR)
- American Association of State Highway and Transportation Officials (AASHTO)
- Amtrak
- International Union of Railways (UIC)
- National Association of Railroad Passengers (NARP)
- PublicTransportation.org
- States for Passenger Rail Coalition (S4PRC)
Regional Organizations
- California High-Speed Rail Authority (CaHSRA)
- Indiana High-Speed Rail Association (INHSR)
- Midwest High-Speed Rail Association
- Midwest Interstate Passenger Rail Commission (MIPRC)
- Midwest Regional Rail Initiative (MWRRI)
- Ohio Rail Development Commission (ORDC)
- Rocky Mountain Rail Authority (RMRA)
- Southeast High Speed Rail Corridor (SEHSR)
- Texas High Speed Rail and Transportation Corporation (THSRTC)
- Western High Speed Rail Alliance
