LLP HMA Pavements Inertial Profiler
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Transcript of LLP HMA Pavements Inertial Profiler
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LLP HMA PavementsInertial Profiler
Prebid MeetingSolano 80 - 04-4A0104
Oakland, CASeptember 14, 2012
Peter VacuraChief, Office of Asphalt Pavement
Division of Maintenance
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OverviewInertial Profiler in lieu of California ProfilographInertial Profiler Specifications– Certification– Calibration– Acceptance Criteria
IRILocalized RoughnessAnalysis Tools
Incentive/Disincentive
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Inertial Profiler in lieu of California Profilograph
California Profilograph utilizes a center wheelInertial Profiler utilizes an accelerometer and laserMeasures at highway speedNo lane closures required
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Inertial Profiler SpecificationsEquipment and Operator certification performed by Texas Transportation InstituteIn accordance with AASHTO PP 49-08Local Calibration at the project– 5 Runs– 0.92 correlation
In accordance with AASHTO PP 50-08
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Inertial Profiler SpecificationsIndex Acceptance Criteria– International Roughness Index (IRI) in lieu of
Profile Index– Acceptance between 45.1 and 60 in/mi
Bump Acceptance Criteria– Localized Roughness in lieu of bump must
grind– IRI of 140 in/mi within a 25 foot measurement
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Inertial Profiler SpecificationsAnalysis Tools– Vendor analysis tool– Proval analysis tool
Provides reports that include data required in the contract
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Incentive/DisincentiveMeasurements based on 0.1 mile lotsIncentive is paid for IRI < 45.1 in/miDisincentive pay adjustment for IRI > 60 in/miCorrection required for IRI > 75 in/mi to within the acceptable range