The National Academies

NCHRP 17-74 [Final]

Application of Crash Modification Factors for Access Management

  Project Data
Funds: $450,000
Research Agency: Vanasse Hangen Brustlin, Inc.
Principal Investigator: Frank Gross
Effective Date: 10/24/2016
Completion Date: 10/30/2020
Comments: Final report has been published as NCHRP Research Report 974 Volumes 1 and 2

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.

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