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


New Policy and Guidance Document on Thermometers for AASHTO Accreditation

Mar 28, 2019

AASHTO re:source has published a new Policy and Guidance Document on Thermometer Selection and Records.  During on-site assessment, AASHTO re:source staff will review the thermometers used in your laboratory as well as the accompanying records to verify conformance to this policy.  * If you have any questions about this policy, please do not hesitate to contact us at

Other Policy Documents for the AASHTO Accreditation Program can be found in the Document Library at