Highway Speed Radar for Pavement and Bridge Deck Evaluationby Kenneth R. Maser, INFRASENSE Inc, Cambridge, United States,
Abstract: Radar has been developed as an economical alternative evaluating pavement layer properties and estimating quantities of deterioration in bridge decks. These highway applications are based on the use of vehicle-mounted radar systems travelling at highway speed. Surveys are conducted without lane closures, and extensive lane and area coverage are obtained in a short survey period. Customized software is used to handle and interpret the pavements, has demonstrated an accuracy of ± 5% to 8% for asphalt layer thickness evaluation based on tests on 74 pavement sections and correlation with 332 cores. DEGAR, for bridge decks, has demonstrated an accuracy of ± 4.4% of the total deteriorated area based on ground truth evaluation of 44 bridge decks. The paper briefly describes the hardware and software components, the analytic methods used, in and the results of field evaluation programs in which the PAVLAYER and DEGAR results are correlated with ground truth. Typical output and ground truth correlations are presented.
Subject Headings: Bridge decks | Radar | Bridge tests | Computer software | Asphalt pavements | Deterioration | Highways and roads
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