The Standard Specifications for Transportation Materials and Methods of Sampling and Testing, and AASHTO Provisional Standards (the "Materials Standards") contains specifications, test methods, and provisional standards ..... Read More
These guide specifications provide guidance for developing transportation contract specifications and are the national standard for best practices in highway and road construction. This consensus-based guide ..... Read More
This 2020 3rd edition includes the following revisions and updates from the previous 2015 2nd edition: new fracture mechanics-based model for reflective cracking in AC overlays over flexible, ..... Read More
The Special Committee on Research and Innovation (R&I) will serve as AASHTO’s foremost proponent for high-value transportation research, technology, and innovation to provide a safe and efficient transportation system to improve the nation’s mobility of people and goods. R&I and its Research Advisory Committee (RAC) will support AASHTO and the transportation community in identifying, conducting, delivering, and facilitating deployment of high-value research results. R&I and RAC will ensure that transportation research addresses critical short-term and long-term national needs through its own activities and by consulting and advising other transportation programs at the national, regional, state, and local levels.