The American Association of State Highway and Transportation Officials has released the 2021 edition of its Standard Specifications for Transportation Materials and Methods of Sampling and Testing and AASHTO Provisional Standards, commonly referred to as the “Materials Standards” guide.
Developed by the AASHTO Committee on Materials and Pavements, the Materials Standards guide contains specifications, test methods, and provisional standards commonly used in the construction of highway facilities.
AASHTO is returning to a single annual release of the standards, rather than three separate annual updates, for the 2021 edition – with the PDF Download format of the guide released each year in July followed by the paperback format in September.
To make it easier for users to track updates and search for specific standards, AASHTO organized its Material Standards volumes by standard type: M and R standards in one volume; T standards in another; and MP, PP, and TP standards in the third.
The 2021 edition of the Materials Standards guide includes 12 new and 52 revised standards – a downloadable summary is available by clicking here – with each standard’s designation number, title, technical section number, and balloted revisions included.