LRFR Methodology for Missouri Bridges

Load and Resistance Factor Rating, also referred to as LRFR, is an American Association of State Highway and Transportation Officials (AASHTO)-adopted guide manual for the condition evaluation of bridge structures. Missouri Department of Transportation (MoDOT) has recently updated their load rating policy to better reflect the wide range of heavier vehicles legally travelling along Missouri roads. These updated rating practices are predominately based on the Load Factor Rating (LFR) methodology, with the allowance for the allowable stress rating methodology in special situations (example is timber bridges). The updated rating practices also includes the LRFR methodology for general load ratings, but not for load posting determinations. MoDOT would like to implement load posting policy with the LRFR methodology that is consistent with their current policy using LFR and provides similar results in terms of the number of bridges requiring load postings. The Research Team will provide MoDOT with recommendations of LRFR adoption.


    • English


    • Status: Active
    • Funding: $184,999
    • Contract Numbers:


    • Sponsor Organizations:

      Missouri Department of Transportation

      1617 Missouri Boulevard
      P.O. Box 270
      Jefferson City, MO  United States  65102
    • Project Managers:

      Hosey, Jenni

    • Performing Organizations:

      Missouri Center for Transportation Innovation

      Lafferre Hall
      416 S 6th St.
      Columbia, Missouri  United States  65201
    • Principal Investigators:

      Thiagarajan, Ganesh

      Myers, John

    • Start Date: 20210601
    • Expected Completion Date: 20240731
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01784660
    • Record Type: Research project
    • Source Agency: Missouri Department of Transportation
    • Contract Numbers: TR202122
    • Files: RIP, STATEDOT
    • Created Date: Oct 13 2021 11:44AM