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
You will be notified when the committee will meet to review and vote on applications. For Interstate applications be sure to include any and all supporting documents you have from FHWA.
Note: To see the steps of the USRN Application Process and the USRN Application Database , please click the Resources tab on the left of the page. The information was developed from all the files maintained in the AASHTO office. If you have any questions, please email email@example.com.