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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 LTS-5-I2-2011 PDF
The 2011 interim contains updated information for the Standard Specifications for Structural Support..
AASHTO LTS-6 Errata-2013 PDF
Errata for Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Traffi..
AASHTO LTS-6-2013 PDF
AASHTO LTS-6, Standard Specifications for Structural Supports for Highway Signs, Luminaires, and Tra..
AASHTO LTS-6-I1-2014 PDF
2015 Interim Revisions to Standard Specifications for Structural Supports for Highway Signs, Luminai..
AASHTO LTS-6-I2-2018 PDF
2019 Interim Revisions to Standard Specifications for Structural Supports for Highway Signs, Luminai..
AASHTO LTS-6-I3-2019 PDF
2020 Interim Revisions to Standard Specifications for Structural Supports for Highway Signs, Luminai..
AASHTO LTS-6-I4-2022 PDF
2022 Interim Revisions to Standard Specifications for Structural Supports for Highway Signs, Luminai..
AASHTO LTS-6-I5-2025 PDF
AASHTO has published 2025 Interim Revisions to Standard Specifications for Structural Supports for H..
AASHTO M 102M/M 102-23 PDF
This specification covers untreated and heat-treated carbon and alloy steel forgings for general ind..
AASHTO M 103M/M 103-19 PDF
This specification covers carbon steel castings for general applications that require up to 485 MPa ..