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The
American Association of State Highway Officials (AASHO) was founded on December 12, 1914. Its name was changed to American Association of State Highway and Transportation Officials on November 13, 1973. The name change reflects a broadened scope to cover all modes of transportation, although most
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Although AASHTO sets transportation standards and policy for the United States as a whole, AASHTO is not an agency of the federal government; rather it is an organization of the states themselves. Policies of AASHTO are not federal laws or policies, but rather are ways to coordinate state laws and
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AASHTO TP10: Standard Test Method for
Determining the tensile strength and temperature at fracture of field or laboratory compacted bituminous mixtures by measuring the tensile load in a specimen which is cooled at a constant rate while being restrained from
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AASHTO re:source, formerly the AASHTO Materials
Reference Laboratory (AMRL), accredits laboratories. Accreditation is often required to submit test results to state DOTs. For example, a contract for the construction of a highway bridge may require a minimum
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used. The contract will specify AASHTO Test
Designation T 22, "Compressive Strength of Cylindrical Concrete Specimens," as the means of determining compressive strength. The laboratory performing T 22 will be required to be accredited in that test.
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461:, often called "The Green Book" because of the color of its cover. This book covers the functional design of roads and highways including such things as the layout of intersections, horizontal curves, and vertical curves.
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While AASHTO is not a government body, it does possess quasi-governmental powers in the sense that the organizations that supply its members customarily obey most AASHTO decisions.
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design and construction throughout the United States. Despite its name, the association represents not only highways but air, rail, water, and public transportation as well.
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AASHTO T321-03/TP8: Test
Standard for Determining the Fatigue Life of Compacted Hot-Mix Asphalt (HMA) Subjected to Repeated Flexural Bending
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AASHTO T321/TP4: Test
Standard for Determining the Fatigue Life of Compacted Hot-Mix Asphalt (HMA) Subjected to Repeated Flexural Bending.
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AASHTO TP31: Standard Test Method for
Determining the Resilient Modulus of Bituminous Mixtures by Indirect Tension
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AASHTO T307: Standard Method of Test for
Determining the Resilient Modulus of Soils and Aggregate Materials.
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AASHTO TP62: Standard Method of Test for
Determining Dynamic Modulus of Hot-Mix Asphalt Concrete Mixtures
481:(MASH), crash testing criteria for safety hardware devices for use on highways; it updates and replaces
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883:(Report). American Association of State Highway and Transportation Officials. May 18, 2023
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American
Association of State Highway and Transportation Officials – Governing Documents
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Standard Specifications for Transportation Materials and Methods of Sampling and Testing
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National Transportation Communications for Intelligent Transportation System Protocol
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739:. American Association of State Highway and Transportation Officials. Archived from
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50 state departments of transportation and in District of Columbia and Puerto Rico
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473:. This manual is the base bridge design manual that all DOTs use across the US.
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American Association of State Highway and Transportation Officials.
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American Association of State Highway and Transportation Officials.
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605:"American Association of State Highway and Transportation Officials"
60:"American Association of State Highway and Transportation Officials"
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In addition to its publications, AASHTO performs or cooperates in
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American Association of State Highway and Transportation Officials
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American Association of State Highway and Transportation Officials
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640:"Form 990: Return of Organization Exempt from Income Tax"
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of each state in the United States, as well as those of
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National Academy of Sciences, Engineering, and Medicine
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National Association of City Transportation Officials
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A Policy on Geometric Design of Highways and Streets
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416:of its activities are still specific to highways.
924:Transportation associations in the United States
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872:AASHTO Special Committee on U.S. Route Numbering
765:Weingroff, Richard F. (September–October 2014).
548:Current and withdrawn AASHTO standards include:
427:The voting membership of AASHTO consists of the
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454:Some noteworthy AASHTO publications are:
407:policies in the field of transportation.
111:Learn how and when to remove this message
929:1914 establishments in the United States
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471:AASHTO LRFD Bridge Design Specifications
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867:AASHTO Daily Transportation News Update
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446:has a non-voting associate membership.
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767:"Celebrating A Century of Cooperation"
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504:(NCHRP) which is administered by the
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638:Wright, Frederick (April 10, 2018).
528:AASHTO coordinates the numbering of
478:Manual for Assessing Safety Hardware
49:adding citations to reliable sources
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801:AASHTO Meetings and Member Services
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496:projects. One such project is the
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151:; 109 years ago
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676:"Board of Directors"
518:compressive strength
437:District of Columbia
45:improve this article
538:U.S. Bicycle Routes
530:Interstate Highways
266:Garrett Eucalitto,
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680:transportation.org
234:Executive Director
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771:Public Roads
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616:. Retrieved
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293:Affiliations
207:Headquarters
186:Legal status
138:Abbreviation
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43:Please help
38:verification
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823:"Bookstore"
433:Puerto Rico
339:Volunteers
903:Categories
591:References
486:Report 350
423:Membership
397:guidelines
326:Employees
181:53-0204654
176:Tax ID no.
156:1914-12-12
101:March 2021
71:newspapers
887:April 18,
829:March 30,
806:August 8,
781:March 16,
747:March 30,
686:March 20,
655:Guidestar
544:Standards
393:protocols
314:Expenses
280:Treasurer
276:Secretary
246:President
239:Jim Tymon
190:501(c)(3)
146:Formation
682:. AASHTO
573:See also
522:concrete
520:for the
494:research
435:and the
302:Revenue
581:(NTCIP)
411:Purpose
401:highway
351:Website
196:Purpose
154: (
85:scholar
536:, and
395:, and
389:AASHTO
341:(2016)
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316:(2019)
304:(2019)
253:WisDOT
141:AASHTO
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483:NCHRP
268:CTDOT
215:20004
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78:books
889:2024
831:2016
808:2024
783:2022
749:2016
688:2024
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620:2018
442:The
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360:.org
287:GDOT
164:Type
64:news
777:(2)
356:www
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