Programs that work for you

"They are rigorous, they’re about making sure our labs, personnel, and test methods conform, that they’re in compliance. They’re independent, not driven by a vendor or a construction company.”

California Department of Transportation

Philip Stolarski, Former Deputy Division Chief, DES-METS & GS 

55+ years of experience
PSP participants
samples shipped per year
laboratory assessments per year
accredited labs


Notice of False Claims of Accreditation

Aug 18, 2023

The following has been added to our False Claims of Accreditation page. Please visit that page for a current list of any known false claims of AASHTO Accreditation.

August 18, 2023: 1836 Engineering in Fort Worth, Texas falsely claims the following information on its website: “With our AASHTO accredited laboratories, we can provide the following:” 1836 Engineering is not enrolled in any programs of AASHTO re:source and has no AASHTO Accredited laboratories.

If you believe a laboratory is falsely claiming AASHTO Accreditation, please contact Brian Johnson ( or 240-436-4820).

To avoid unintentionally misstating your laboratory's accreditation status, review our Policy on Publicizing Your AASHTO Accreditation.