- AASHTO American Association of State Highway Transportation Officials
- American Concrete Institute (ACI)
- American Institute of Steel Construction (AISC)
- American Iron and Steel Institute (AISI)
- American Railway Engineering and Maintenance-of-Way Association(AREMA)
- ASBI American Segmental Bridge Institute
- American Society of Civil Engineers (ASCE)
- American Society for Testing and Materials (ASTM)
- Better Roads Bridge Inventories.
- Bridge Builder Magazine
- Bureau of Transporation Statistics (US). Huge databases of transporation data and research papers.
- FHWA Bridge – US Federal Highway Administration, Office of Bridge Technology
- FHWA Eastern Federal Land – US Federal Highway Administration, Eastern Federal land Division
- FTA – Federal Transit Administration
- International Association for Bridge and Structural Engineering (IABSE)
- MCEER – Multidisciplinary Center for Earthquake Engineering Research
- NIST – National Institute for Standards and Technology
- NISEE – National Information Service for Earthquake Engineering
- National Steel Bridge Alliance (NSBA)
- Precast/Prestressed Concrete Institute (PCI)
- Transportation Research Board
- Turner-Fairbanks Highway Research Center
- United States Department of Transportation
- U.S. Army Corps of Engineers
- U.S. Coast guard Bridge Administration