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NTSB Investigation Blames ‘Design Errors’ for FIU Pedestrian Bridge Collapse
Nov 16, 2018
An investigative update issued by the National Transportation Safety Board Nov. 15 regarding the fatal Florida International University pedestrian ...
GAO Issues Reports on Railroad Grade Crossing Programs, Inland Waterway Funding
Nov 16, 2018
The Government Accountability Office issued two transportation-related reports in early November; one that called for “greater flexibility” in ...
Direct from the Source
Releases from AASHTO and State DOTs
AASHTO Directors Choose Jim Tymon for Executive Director
Sep 24, 2018
ATLANTA – Following an intensive, multi-month search, James J. Tymon was selected to become the sixth executive director of ...
New AASHTO President Says Workforce and Funding Issues Top His Priority List
Sep 24, 2018
Utah DOT’s Carlos Braceras Elected AASHTO President, Missouri DOT’s Patrick McKenna VP ATLANTA – Today, the board ...
Two States Earn Top Awards in National Transportation Competition
Sep 23, 2018
ATLANTA –An innovative fix for a congestion-plagued interchange connecting people to some of Chicago’s most popular destinations ...
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Featured Publication
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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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AASHTO LRFD Bridge Construction Specifications, 4th Edition
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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Manual for Assessing Safety Hardware, Second Edition, Single User PDF Download
This manual encourages consistency in testing and evaluation of roadside safety features. It includes a new matrix for cable barrier testing on slopes, modifications to several test vehicle dimensions, and updated test documentation requirements. -
Standard Specifications for Transportation Materials and Methods of Sampling and Testing, and AASHTO Provisional Standards, Single User Web-Based One-Year Subscription
The AASHTO Materials Standards contain specifications, test methods, and provisional standards commonly used in the construction of highway facilities. They are available as a one-year online subscription. When you subscribe, you will automatically receive access to all updates published during your subscription period, as well as access to recent past editions, with changes between editions highlighted for ease of reference. The Materials Standards are updated three times per year, in mid-April, mid-June, and mid-August. * The .....
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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 five transportation modes: air, highways, public 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.