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State DOTs Respond as Hurricane Florence hits East Coast
Sep 14, 2018
Though downgraded to a Category 2 storm before making landfall, the 100 mph-plus winds and heavy rains generated by Hurricane ...
House, Senate Reconcile Bills on Water Infrastructure Legislation
Sep 14, 2018
The House of Representative’s Transportation and Infrastructure Committee and the Senate’s Environment and Public Works Committee ...
Direct from the Source
Releases from AASHTO and State DOTs
Roadway Lighting Work to Begin in Hot Springs
Sep 18, 2018
America’s 12 Best Transportation Projects Now Competing for Two Final Prizes
Aug 30, 2018
Public's online vote will determine $10,000 winnerWASHINGTON — After four regional competitions, this year's top 12 transportation projects have made it ...
Mid-America Transportation Projects Win Big in National Competition
Aug 29, 2018
TRAVERSE CITY, Mich. – Eight outstanding transportation projects from five mid-America states were honored today in the fourth and ...
Winners Announced in National Faces of Transportation Competition
Aug 23, 2018
WASHINGTON – Two captivating photographs and three compelling videos won prizes in the 13th annual Faces of Transportation competition ...
Posted: Sep 18, 2018
Posted: Sep 17, 2018
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Featured Publication
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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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Highway Safety Manual, First Edition, 2014 Supplement
The Highway Safety Manual Supplement includes two new chapters that help utilize the predictive method to estimate the expected average crash frequency (in total, by crash type, or by crash severity) for both freeways and ramps with known characteristics. The third chapter, Appendix B for Part C, describes two specialized procedures to be used with the predictive method presented in the new Chapters 18 and 19; the first procedure is used to calibrate the predictive models; 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.