News
Daily Update
AASHTO Journal
Transportation Investment Touted for Post-Coronavirus Recovery
Apr 3, 2020
As President Trump and members of Congress tout the possibility of pulling together a national infrastructure investment package, ...
NHTSA, EPA Roll Out Final Fuel Economy Rule
Apr 3, 2020
The National Highway Traffic Safety Administration and the U.S. Environmental Protection Agency released the Safer Affordable Fuel-Efficient ...
Direct from the Source
Releases from AASHTO and State DOTs
Weekly Lane Closures - Oahu
Apr 4, 2020
Weekly lane closures - Kauai
Apr 4, 2020
Weekly lane closures - Hawaii Island
Apr 4, 2020
Weekly lane closures - Maui
Apr 4, 2020
AASHTO Campaign Links Greater Transportation Investment to Nationwide Benefits
Mar 3, 2020
Website Identifies State DOT Projects Making Travel Faster and Safer and the Environment and Economy Stronger and Better ...
AASHTO Applauds Congress for Saving Billions for Transportation
Nov 22, 2019
WASHINGTON – The American Association of State Highway and Transportation Officials thanked Congress and the President for their bipartisan ...
New AASHTO President to Emphasize Transportation Safety and Funding
Oct 9, 2019
Missouri DOT’s Patrick McKenna Elected AASHTO President;New Hampshire DOT’s Victoria Sheehan VP ST. LOUIS – The ...
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Featured Publication
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Mechanistic-Empirical Pavement Design Guide: A Manual of Practice, 3rd Edition
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, semi-rigid, and rigid pavements; new mechanistic-empirical model for short jointed plain concrete pavement (SJPCP) overlays of flexible pavements; new flexible and semi-rigid pavement global calibration coefficients; addition of non-structural preventative maintenance treatment consideration for flexible and rigid pavements; addition of five level 3 default distributions for normalized axle load spectra (.....
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A Policy on Geometric Design of Highways and Streets, 7th Edition, Single User PDF Download
A Policy on Geometric Design of Highways and Streets, 7th Edition, 2018, commonly referred to as the “Green Book,” contains the current design research and practices for highway and street geometric design. This edition presents an updated framework for geometric design that is more flexible, multimodal, and performance-based than in the past. The document provides guidance to engineers and designers who strive to make unique design solutions that meet the needs of all highway and street .....
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Manual for Bridge Evaluation, 3rd Edition
This manual has been developed to assist bridge owners by establishing inspection procedures and evaluation practices that meet the National Bridge Inspection Standards (NBIS). The manual has been divided into eight sections, with each section representing a distinct phase of an overall bridge inspection and evaluation program. This edition updates Sections 3: Bridge Management Systems; 4: Inspection; 6: Load Rating; and 7: Fatigue Evaluation of Steel Bridges. -
AASHTO LRFD Bridge Construction Specifications, 4th Edition, with 2020 Interim Revisions
The AASHTO LRFD Bridge Construction Specifications are intended for use in the construction of bridges. The specifications employ the Load and Resistance Factor Design (LRFD) methodology, and are designed to be used in conjunction with the AASHTO LRFD Bridge Design Specifications. Revisions from the 3rd edition of this title include a complete revision of Section 3, Temporary Works, and changes to Section 10, Prestressing; Section 11, Steel Structures; Section 19, Bridge Deck Joint Seals; and Section 27, Concrete Culverts. -
AASHTO LRFD Bridge Design Specifications, 8th Edition
These specifications cover the design, evaluation, and rehabilitation of highway bridges. The design provisions of these specifications employ the Load and Resistance Factor Design (LRFD) methodology, which is based on structural reliability theory, and calibrated to achieve a target level of reliability. Updates to this edition include: * A completely updated and revised Section 5 on Concrete Structures (Appendix E5, comparing the 7th and 8th Edition versions of this Section can be downloaded below) * New, simplified steel .....
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About AASHTO
AASHTO – The American Association of State Highway Transportation Officials – is a nonprofit, nonpartisan association representing highway and transportation departments in the 50 states, the District of Columbia, and Puerto Rico. It represents all transportation modes, including air, highways, public transportation, active transportation, rail, and water. Its primary goal is to foster the development, operation, and maintenance of an integrated national transportation system.
AASHTO works to educate the public and key decision makers about the critical role that transportation plays in securing a good quality of life and sound economy for our nation. AASHTO serves as a liaison between state departments of transportation and the Federal government. AASHTO is an international leader in setting technical standards for all phases of highway system development. Standards are issued for design, construction of highways and bridges, materials, and many other technical areas.