Developing Safety Performance Function (SPF) and Crash Modification Factor (CMF) for Managed Lanes Separation Treatments

The aim of this project is to expand understanding of the effects of separation type selection on safety performance. This project will collect data from existing managed lane facilities in Florida and develop Safety Performance Functions (SPFs) and Crash Modification Factors (CMFs) for managed lane facilities based on separation type. A SPF will be developed for a managed lane facilities base condition, and CMFs will be developed for variations in separation type. If the data collected supports the development of CMFs for features other than separation type, they may also be included in the research. Possibilities include access type, access frequency, and number of lanes. All separation types listed above should be included in the study, if adequate data does not exist in Florida, data from facilities in other states may be used. The desired outcome of this research is CMFs and SPFs that can be used to quantitatively compare alternatives during project development and design. This research will focus on the four separation types (1) barrier separation, (2) buffer separation with managed lane markers, (3) buffer separation with pavement marking, and (4) wide buffer separation.


    • English


    • Status: Active
    • Funding: $223950
    • Contract Numbers:


    • Sponsor Organizations:

      Florida Department of Transportation

      605 Suwannee Street
      Tallahassee, FL  United States  32399-0450
    • Managing Organizations:

      Florida Department of Transportation

      Research Center
      605 Suwannee Street MS-30
      Tallahassee, FL  United States  32399-0450
    • Project Managers:

      Ponnaluri, Raj

    • Performing Organizations:

      Florida International University

      Division of Research
      11200 SW 8th St, MARC 430
      Miami, FL  United States  33199
    • Principal Investigators:

      Alluri, Priyanka

    • Start Date: 20200616
    • Expected Completion Date: 20220430
    • Actual Completion Date: 0

    Subject/Index Terms

    Filing Info

    • Accession Number: 01742567
    • Record Type: Research project
    • Source Agency: Florida Department of Transportation
    • Contract Numbers: BE975
    • Files: RIP, STATEDOT
    • Created Date: Jun 17 2020 10:41AM