Implementation of Portable Weigh-In-Motion (WIM) Technology on Texas Highways

Due to high costs, there are a limited number of permanent weigh-in-motion (WIM) stations on the Texas highway network, mostly located on interstate highways. As such, it is not feasible to generate accurate load spectra data required for every highway project other than relying on antiquated estimates, even for the 18-kip equivalent single axle loads (ESALs) used in Flexible Pavement System (FPS) designs. The net result is unoptimized designs or poor performing pavement structures with increased maintenance costs or high construction costs due to over-designing, with high overall life cycle costs. Successful statewide implementation and calibration of the mechanistic-empirically (M-E) pavement design methods is also highly dependent on the availability of accurate axle load spectra data, and so is the need for rapid quantification of accurate site-specific traffic data.At a fraction of the cost of permanent WIMs, the portable WIM technology offers a practical alternative or supplement as a cost-effective tool to measure and quantify traffic loading (i.e., volume counts, vehicle class distribution, speed, vehicle weights, ESALs, FPS/M-E inputs) for any given highway site. In research project 0-6940, Develop Systems to Render Mechanistic-Empirical Traffic Data for Pavement Design, portable WIM technology has been successfully explored and demonstrated to accurately measure and collect site-specific traffic data for pavement designs and maintenance or rehabilitation (M/R) purposes in the following TxDOT Districts: Brownwood, Bryan, Corpus Christi, Fort Worth, Laredo, and Odessa.


  • English


  • Status: Active
  • Funding: $275316
  • Contract Numbers:


  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483

    Federal Highway Administration

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

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483
  • Project Managers:

    Odell, Wade

  • Performing Organizations:

    Texas A&M Transportation Institute, College Station

    Texas A&M University System
    3135 TAMU
    College Station, TX  United States  77843-3135
  • Principal Investigators:

    Walubita, Lubinda F.

  • Start Date: 20190419
  • Expected Completion Date: 20210831
  • Actual Completion Date: 0
  • Source Data: TxDOT Research Library

Subject/Index Terms

Filing Info

  • Accession Number: 01744080
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 5-6940-01
  • Files: RIP, STATEDOT
  • Created Date: Jun 25 2020 1:03PM