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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 HAZ-1-2015 PDF
AASHTO HAZ-1, Fundamental Capabilities of Effective All-Hazards Infrastructure Protection, Resilienc..
AASHTO HB-17-2002 PDF
AASHTO HB-17, Standard Specifications for Highway Bridges, 17th Edition (2002), presents the structu..
AASHTO HBP-1-2020 PDF
AASHTO HBP-1, Historic Bridge Preservation Guide, First Edition (2020), addresses the preservation a..
AASHTO HBSLD-1-2020 PDF
AASHTO HBSLD-1, Guide Specification for Service Life Design of Highway Bridges, First Edition (2020)..
AASHTO HDG-4-M-2007 PDF
AASHTO HDG-4-M, Highway Drainage Guidelines, 4th Edition (2007), provides a consolidated overview of..
AASHTO HLED-2-1991 PDF
Supersedes the 1970 Guide for Highway Landscape and Environmental Design , expanded to include all m..
AASHTO HM-44-E1-2024 PDF
September 2024 Errata for Standard Specifications for Transportation Materials and Methods of Sampli..
AASHTO HM-44-E2-2025 PDF
January 2025 Errata for Standard Specifications for Transportation Materials and Methods of Sampling..
AASHTO HM-45-E1-2025 PDF
September 2025 Errata for Standard Specifications for Transportation Materials and Methods of Sampli..
AASHTO HM-45-E2-2025 PDF
October 2025 Errata for Standard Specifications for Transportation Materials and Methods of Sampling..