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AASHTO-American Association of State Highway and Transportation Officials
American Association of State Highway and Transportation Officials (AASHTO) Standards
The American Association of State Highway and Transportation Officials (AASHTO) is a leading organization that develops and publishes technical standards, specifications, guidelines, and industry resources for the transportation sector.
AASHTO standards cover a wide range of applications, including highway design, road construction, bridge engineering, transportation infrastructure, maintenance, public transit, railways, aviation, and water transportation.
Engineers, contractors, transportation agencies, and industry professionals rely on AASHTO publications to support infrastructure planning, design, construction, inspection, and maintenance while promoting safety, quality, and consistency across transportation projects.
At e-Standards Portal, you can explore AASHTO standards, technical specifications, and related publications to find the technical information you need for your engineering and transportation projects.
AASHTO R 23-99 PDF
This standard practice provides a listing of various parameters used in the analysis of natural wate..
AASHTO R 24-99 PDF
The objective of sampling is to collect a portion of material small enough in volume to be convenien..
AASHTO R 25-22 PDF
This document provides a guideline for establishing evaluation and certification procedures for pers..
AASHTO R 26-01 PDF
This standard specifies requirements and procedures for a certification system that shall be applica..
AASHTO R 27-01 PDF
This standard practice is focused on corrosion of steel piling for non-marine soil applications. Thi..
AASHTO R 28-22 PDF
This standard practice covers the accelerated aging (oxidation) of asphalt binders by means of press..
AASHTO R 29-15 PDF
This standard practice describes the testing required to determine the performance grade (PG) of an ..
AASHTO R 30-24 PDF
This standard practice describes procedures for short-term laboratory conditioning of uncompacted as..
AASHTO R 31-09 PDF
This standard practice covers testing criteria for evaluation of protective coating systems for use ..
AASHTO R 32-20 PDF
AASHTO R 32-20 covers the annual calibration of the load cell and the deflection sensors and monthly..