Evaluation and Update of Guardrail Rating Program

KYTC’s Division of Maintenance is responsible for managing identification and prioritization of roadway locations in need of guardrails. The current system for rating the need for guardrail installation (Guardrail Rating Program) was updated in 2009, but crash/accident data elements are not consistent with currently acceptable methodologies incorporated into the Highway Safety Manual (HSM). Specifically, the Accident Rate element of the rating system, which is based on critical numbers of crashes and critical rate, should be replaced with the more statistically reliable Potential for Crash Reduction factor, which can be determined based on HSM methodologies. In addition, the overall rating system should be reviewed to determine if the rating elements are appropriately weighted and data input can depend less on the experience of district personnel completing the rating forms. In some cases, the level of experience and subjectivity of those inputting data has resulted in the overall process being inconsistent.


    • English


    • Status: Completed
    • Funding: $100000
    • Contract Numbers:

      SPR 19-577

    • Sponsor Organizations:

      Kentucky Transportation Cabinet

      200 Mero Street
      Frankfort, KY  United States  40622
    • Performing Organizations:

      University of Kentucky, Lexington

      Kentucky Transportation Center College of Engineering, 176 Raymond Building
      Lexington, KY  United States  40506-0281
    • Principal Investigators:

      Howell, Brian

    • Start Date: 20180701
    • Expected Completion Date: 20190630
    • Actual Completion Date: 20190901

    Subject/Index Terms

    Filing Info

    • Accession Number: 01677444
    • Record Type: Research project
    • Source Agency: University of Kentucky, Lexington
    • Contract Numbers: SPR 19-577
    • Files: RiP, STATEDOT
    • Created Date: Aug 6 2018 2:53PM