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 AASHTO Materials Standards contain specifications, test methods, and provisional standards commonly used in the construction of highway facilities.
The Materials Standards are updated three times ..... Read More
Final Decision for applications reviewed on May 13, 2015. The Special Committee on U.S. Route Numbering decisions was accepted and approved by the Standing Committee on Highways on May 14, 2015. See the following report: SM 2015 USRN SCOH REPORT.pdf