Application of Crash Modification Factors for Access Management

The objectives of this research were to: (1) develop new and refine existing Crash Modification Factors (CMFs) for all elements for various roadway categories such as geometrics, geography, land use context, and other identifying conditions or features of access management; (2) quantify the safety performance of access management features for both Crash Modification Factors and applicable Crash Modification Functions (CMFs); (3) provide additional information for the use of access management related Crash Modification Factors and Functions (CMFs) from the HSM and the CMF Clearinghouse and additionally developed CMFs for inclusion in the CMF Clearinghouse; and (4) verify the application of existing Safety Performance Functions (SPFs) and identify gaps. NCHRP Project Report 974: Application of Crash Modification Factors for Access Management Volume 1: Practitioner's Guide and the research overview NCHRP Research Report 974:Application of Crash Modification Factors for Access Management Volume 2: Research Overview are available for immediate use.


  • English


  • Status: Completed
  • Funding: $450000
  • Contract Numbers:

    Project 17-74

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Bush, Mark

  • Performing Organizations:

    Vanasse Hangen Brustlin, Incorporated

    333 Fayetteville Street, Suite 1450
    Raleigh, NC  United States  27601
  • Principal Investigators:

    Gross, Frank

  • Start Date: 20161024
  • Expected Completion Date: 20201030
  • Actual Completion Date: 0
  • Source Data: RiP Project 40214

Subject/Index Terms

Filing Info

  • Accession Number: 01572344
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 17-74
  • Files: TRB, RIP
  • Created Date: Aug 6 2015 1:00AM