Turner-Fairbank Highway Research Center

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NCHRP Report 617: Accident Modification Factors for Traffic Engineering and ITS Improvements

Product Type

Research Report


Harkey, D.L., R. Srinivasan, J. Baek, F.M. Council, K. Eccles, N. Lefler, F. Gross, B. Persaud, C. Lyon, E. Hauer, and J.A. Bonneson




This report presents the findings of a research project to develop accident modification factors (AMFs) for traffic engineering and Intelligent Transportation Systems (ITS) improvements. AMFs are a tool for quickly estimating the impact of safety improvements. The report will be of particular interest to safety practitioners responsible for programming and implementing highway safety improvements.

Link To Research Report

NCHRP Report 617: Accident Modification Factors for Traffic Engineering and ITS Improvements


Accident modification factors
Crash reduction factors
Highway safety
Intelligent transportation systems
Traffic engineering

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