TRC1801 - Evaluation of WIM Auto-Calibration Practices and Parameters

Weigh-in-motion (WIM) systems capture weight and axle configurations of vehicles using the state highway network. This data is useful for interpreting the performance of our transportation infrastructure and support design, maintenance, and pavement preservation. Inaccurate estimation of axle weights can result in overestimation of ESALs for pavement design. This project aims at redesigning the auto-calibration function of WIM sites across the state. A protocol is being developed to use an updated algorithm for auto-calibration. Currently, this project is in the phase of testing a new algorithm developed from an algorithm used by MnDOT for auto-calibration. This algorithm is being compared with original MnDOT auto-calibration, as well as the auto-calibration currently being used by ARDOT. Once the algorithm is developed, it will be tested with data from WIM sites across the state, and will be verified through field testing to ensure it will be accurate for sites in different locations with varying site conditions.


    • Status: Active
    • Funding: $174.545
    • Contract Numbers:


    • Sponsor Organizations:

      Federal Highway Administration

      1200 New Jersey Avenue, SE
      Washington, DC  United States  20590
    • Managing Organizations:

      Arkansas Department of Transportation

      P.O. Box 2261
      Little Rock, AR  United States  72203
    • Project Managers:

      Caster, William

    • Performing Organizations:

      University of Arkansas, Fayetteville

      4190 Bell Engineering
      Civil Engineering
      Fayetteville, Arkansas  United States  72701
    • Principal Investigators:

      Hernandez, Sarah

      Nurre, Sarah

    • Start Date: 20170726
    • Expected Completion Date: 20201231
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01678322
    • Record Type: Research project
    • Source Agency: Arkansas Department of Transportation
    • Contract Numbers: TRC1801
    • Files: RIP, STATEDOT
    • Created Date: Aug 22 2018 3:11PM