LLP HMA PavementsInertial Profiler

Prebid MeetingSolano 80 - 04-4A0104

Oakland, CASeptember 14, 2012

Peter VacuraChief, Office of Asphalt Pavement

Division of Maintenance

OverviewInertial Profiler in lieu of California ProfilographInertial Profiler Specifications– Certification– Calibration– Acceptance Criteria

IRILocalized RoughnessAnalysis Tools

Incentive/Disincentive

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

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

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

Inertial Profiler SpecificationsAnalysis Tools– Vendor analysis tool– Proval analysis tool

Provides reports that include data required in the contract

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