Safety Performance Functions for Arkansas

The publication of the Highway Safety Manual (HSM) by the American Association of State Highway and Transportation Officials (AASHTO) in 2010 ushered in a new era for roadway planning, design, and operations procedures. Two of the main computational tools in the HSM are safety performance functions (SPF) and crash modification factors (CMF). Due to varying characteristics among jurisdictions (such as crash reporting practices), the HSM states that, "it is important that the SPFs ... be calibrated for application in each jurisdiction" (HSM, p. C-18). As agencies begin the process of understanding and using new concepts and tools in the HSM, they can choose to either calibrate the existing SPFs in the HSM or develop new jurisdiction-specific SPFs. This research project will calibrate the existing SPFs for rural roadways in Arkansas, and illustrate how they can be used to improve the decision making process.


    • English


    • Status: Completed
    • Funding: $202554
    • Contract Numbers:


    • Sponsor Organizations:

      Federal Highway Administration

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

      Frierson, Tymli

    • Performing Organizations:

      University of Arkansas, Fayetteville

      Board of Trustees
      Fayetteville, AR  United States 
    • Principal Investigators:

      Gattis, J

    • Start Date: 20141109
    • Expected Completion Date: 20160601
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01631176
    • Record Type: Research project
    • Source Agency: Arkansas Department of Transportation
    • Contract Numbers: TRC1503
    • Files: RiP, STATEDOT
    • Created Date: Mar 29 2017 3:57PM