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The National Academies

NCHRP 20-07/Task 164 [Completed]

Revision of AASHTO R9-97
[ NCHRP 20-07 (Research for AASHTO Standing Committee on Highways) ]

  Project Data
Funds: 61500
Research Agency: Consultant: Charles S. Hughes
Effective Date: 2/24/2003
Completion Date: 12/31/2003
Comments: Completed

Task 164, FY 2003, "Revision of AASHTO R9-97 'Standard Recommended Practice for Acceptance Sampling Plans for Highway Construction", (Charles S. Hughes). This project recommended revisions to the current AASHTO R9-97 standard recommended practice to improve its clarity, eliminate extraneous text, and introduce two significant additions, viz., guidance on establishing individual and composite pay factors and guidance on setting appropriate risk levels for acceptance plans that use pay factors. The manual developed through pooled fund study SPR-2 (199) served as the basis for most of the revisions. The final version of the revised R9 is being balloted through the appropriate technical section of the AASHTO Subcommittee on Materials for adoption. (NCHRP Staff: E.T. Harrigan)

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