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  • AASHTO resource
    The AASHTO Accreditation Program formally recognized the competence of over 1,800 testing laboratories to perform specific tests on construction materials, enhancing customer confidence
  • Login - AASHTO resource
    Register your Laboratory © 2026 AASHTO re:source All Rights Reserved
  • AASHTO Association - Home
    The American Association of State Highway and Transportation Officials – is a nonprofit, nonpartisan association representing highway and transportation departments in the 50 states, the District of Columbia, and Puerto Rico
  • AASHTO Association - Store
    AASHTO Store offers a wide range of publications, training materials, and other resources related to transportation engineering, design, construction, maintenance, and safety
  • AASHTO Guidance | FHWA - Federal Highway Administration
    AASHTO works to educate the public and key decision makers about the critical role that transportation plays in securing a good quality of life and sound economy for our nation, by setting design and installation standards, providing guidance and resources, and developing outreach materials
  • Overview - AASHTO resource
    AASHTO re:source is a technical service program of the American Association of State Highway and Transportation Officials (AASHTO), an international leader in the development of transportation standards and guides
  • AASHTO Accreditation Overview - AASHTO resource
    Users can search for specific laboratories by city or state country using the directory of accredited laboratories The directory is updated frequently and is the sole source for current accreditation information
  • Proficiency Sample Overview - AASHTO resource
    AASHTO re:source’s Proficiency Sample Program (PSP) is the largest construction materials sample program in the world, with a customer base of approximately 3,000 testing laboratories Samples are distributed to federal, state, independent, commercial, and research testing laboratories
  • Document Library - AASHTO resource
    Proficiency Sample Datasheets and Instructions
  • reUniversity
    We provide services and tools through our three major programs: the Laboratory Assessment Program (LAP), the Proficiency Sample Program (PSP), and the AASHTO Accreditation Program (AAP)





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