LTPP Data Analysis: Develop Practical Tools and Procedures to Improve WIM Data Quality

Weigh-in-motion (WIM) systems are a vital means for collecting traffic data—critical input for pavement and bridge designs—used for making transportation and freight planning decisions and in highway safety investigations. There are, however, many potential sources of error in WIM measurements which make it difficult for data collectors to evaluate data accuracy and consistency. For over a decade, the Federal Highway Administration (FHWA) Long-Term Pavement Performance (LTPP) program collected a massive amount of WIM data, along with information about the performance of WIM equipment. This includes the WIM validation and calibration data from 24 LTPP Specific Pavement Studies (SPS) test sites across North America. This and other data sets provide an opportunity to develop more advanced WIM tools to help state highway practitioners perform WIM site selection, sensor selection, maintenance, development of calibration procedures including frequency, and data quality acceptance. These tools could help improve WIM data accuracy and consistency by considering factors such as temperature and seasonal effects, vehicle speed, pavement condition, changes in truck population and configurations, data sampling frequencies, system age, and other factors. The objective of this research is to develop the next generation of tools and procedures to improve accuracy and increase reliability of WIM data through (1) more appropriate site selections; (2) WIM system selection, installation, calibration, and maintenance; (3) data analysis methods; and (4) quality control/quality assurance (QC/QA) procedures.  


  • English


  • Status: Completed
  • Funding: $469998
  • Contract Numbers:

    Project 20-50(20)

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Crichton-Sumners, Camille

  • Performing Organizations:

    Applied Research Associates, Incorporated

    505 West University Avenue
    Champaign, IL  United States  61820-3915
  • Principal Investigators:

    Selezneva, Olga

  • Start Date: 20181001
  • Expected Completion Date: 20230430
  • Actual Completion Date: 20230430
  • Source Data: RiP Project 41742

Subject/Index Terms

Filing Info

  • Accession Number: 01640231
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-50(20)
  • Files: TRB, RIP
  • Created Date: Jul 4 2017 9:59AM