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The National Academies

NCHRP 20-07/Task 053 [Completed]

Profilograph Limitations, Correlation, and Calibration for Effective Performance Based Specifications
[ NCHRP 20-07 (Research for AASHTO Standing Committee on Highways) ]

  Project Data
Funds: 25000
Research Agency: Larry Scofield
Effective Date: 4/20/1992
Completion Date: 3/15/1993

Task 53, FY 1992, "Profilograph Limitations, Correlation and Calibration Criteria for Effective Performance Based Specifications" (Mr. Larry Scofield). This task was requested by the Highway Subcommittee on Construction to resolve the high variability in manual reduction of tracings when using the California type profilographs and significant differences between automated profilograph and manual data reductions. This top was intended to investigate and assess the nature of the problem and its extent. The output from this investigation was a synthesis of the situation, compiling in a logical manner what has been done in this area, complete with a proposed solution and recommendations for research. The final report has been distributed.

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