Organizations
- American Association of Private Railroad Car Owners (AAPRCO)
- American Public Transportation Association (APTA)
- American Railway Engineering and Maintenance-of-Way Association (AREMA)
- American Short Line and Regional Railroad Association (ASLRRA)
- Association of American Railroads (AAR)
- Australasian Railway Association
- Community of European Railway and Infrastructure Companies (CER)
- Federal Railroad Administration (FRA)
- Institution of Railway Signal Engineers (IRSE)
- International Association of Public Transport (UITP)
- International Union of Railways (UIC)
- National Railroad Construction & Maintenance Association (NRC)
- Permanent Way Institution
- Railway Association of Canada
- Railway Engineering-Maintenance Suppliers Association (REMSA)
- Railway Industry Association (RIA, UK)
- Railway Supply Institute (RSI)
- Railway Tie Association
- US High Speed Rail Association