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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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472:, 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
492:(MASH), crash testing criteria for safety hardware devices for use on highways; it updates and replaces
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894:(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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750:. 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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484:. This manual is the base bridge design manual that all DOTs use across the US.
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836:. American Association of State Highway and Transportation Officials
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American Association of State Highway and Transportation Officials.
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American Association of State Highway and Transportation Officials.
656:. American Association of State Highway and Transportation Officials
616:"American Association of State Highway and Transportation Officials"
71:"American Association of State Highway and Transportation Officials"
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402:) is a standards setting body which publishes specifications, test
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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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651:"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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427:of its activities are still specific to highways.
935:Transportation associations in the United States
883:AASHTO Special Committee on U.S. Route Numbering
776:Weingroff, Richard F. (September–October 2014).
559:Current and withdrawn AASHTO standards include:
438:The voting membership of AASHTO consists of the
388:American Association of State Highway Officials
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465:Some noteworthy AASHTO publications are:
418:policies in the field of transportation.
122:Learn how and when to remove this message
940:1914 establishments in the United States
930:Road transportation in the United States
482:AASHTO LRFD Bridge Design Specifications
945:Organizations based in Washington, D.C.
878:AASHTO Daily Transportation News Update
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457:has a non-voting associate membership.
778:"Celebrating A Century of Cooperation"
873:AASHTO Materials Reference Laboratory
515:(NCHRP) which is administered by the
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649:Wright, Frederick (April 10, 2018).
539:AASHTO coordinates the numbering of
489:Manual for Assessing Safety Hardware
60:adding citations to reliable sources
812:AASHTO Meetings and Member Services
507:projects. One such project is the
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925:Organizations established in 1914
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920:Civil engineering organizations
47:needs additional citations for
620:Tax Exempt Organization Search
221:555 12th Street NW, Suite 1000
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517:Transportation Research Board
212:departments of transportation
179:Non-governmental organization
440:Department of Transportation
808:"Membership State by State"
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27:Transportation association
519:(TRB), a division of the
210:Coordination among state
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730:"Association 990 filing"
713:"Association 990 filing"
624:Internal Revenue Service
162:; 109 years ago
160:December 12, 1914
687:"Board of Directors"
529:compressive strength
448:District of Columbia
56:improve this article
549:U.S. Bicycle Routes
541:Interstate Highways
277:Garrett Eucalitto,
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691:transportation.org
245:Executive Director
410:that are used in
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896:. Retrieved
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782:Public Roads
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756:. Retrieved
752:the original
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664:– via
660:December 17,
658:. Retrieved
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627:. Retrieved
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564:contraction.
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304:Affiliations
218:Headquarters
197:Legal status
149:Abbreviation
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54:Please help
49:verification
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834:"Bookstore"
444:Puerto Rico
350:Volunteers
914:Categories
602:References
497:Report 350
434:Membership
408:guidelines
337:Employees
192:53-0204654
187:Tax ID no.
167:1914-12-12
112:March 2021
82:newspapers
898:April 18,
840:March 30,
817:August 8,
792:March 16,
758:March 30,
697:March 20,
666:Guidestar
555:Standards
404:protocols
325:Expenses
291:Treasurer
287:Secretary
257:President
250:Jim Tymon
201:501(c)(3)
157:Formation
693:. AASHTO
584:See also
533:concrete
531:for the
505:research
446:and the
313:Revenue
592:(NTCIP)
422:Purpose
412:highway
362:Website
207:Purpose
165: (
96:scholar
547:, and
406:, and
400:AASHTO
352:(2016)
339:(2016)
327:(2019)
315:(2019)
264:WisDOT
152:AASHTO
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892:(PDF)
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494:NCHRP
279:CTDOT
226:20004
103:JSTOR
89:books
900:2024
842:2016
819:2024
794:2022
760:2016
699:2024
662:2018
631:2018
453:The
394:The
371:.org
298:GDOT
175:Type
75:news
788:(2)
367:www
357:150
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58:by
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