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95 AC asphalt concrete ARRB Australian Road Research Board CRC continuously reinforced concrete CV coefficient of variation DMI distance-measuring instrument DOT Department of Transportation FHWA Federal Highway Administration GPS Global Positioning System HPMS Highway Performance Monitoring System HRI half-car roughness index ICC International Cybernetics Corporation IMU inertial measurement unit IRI international roughness index Michigan DOT Michigan Department of Transportation Minnesota DOT Minnesota Department of Transportation MIRI mean IRI NCAT National Center for Asphalt Technology NHI National Highway Institute NHS National Highway System OGFC open-graded friction course PCC portland cement concrete PFC permeable friction course PI profile index QA quality assurance QC quality control SMA stone matrix asphalt SSI Surface Systems and Instruments TTI Texas A&M Transportation Institute UMTRI University of Michigan Transportation Research Institute Abbreviations and Acronyms
