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AASHTO Journal

Free Webinar Showcases Features and Uses of <br>Crash Modification Factors Clearinghouse

A webinar to teach participants how to use the Crash Modification Factors (CMF) Clearinghouse and the benefits it provides to users has been scheduled for next month.

CMFs are factors used to figure the expected number of crashes after implementing a given countermeasure at a certain site. These tools are used by engineers, designers, planners, and others to estimate and compare both the safety and cost-effectiveness of those countermeasures.

The upcoming webinar will focus on how to find information in the Clearinghouse, how to perform a search for a CMF, selecting the best CMF from all returned results, and understanding the CMF star quality rating system. The webinar will also include a live demonstration of how to use the Clearinghouse.

The webinar will be lead by Karen Scurry, transportation specialist at Federal Highway Administration's Office of Safety Programs, and Daniel Carter, senior engineering research associate at the UNC Highway Safety Research Center and manager of the CMF Clearinghouse. Shawn Troy, safety engineer at the North Carolina Department of Transportation, will also speak to how his state uses the Clearinghouse and how he selects CMFs to use in North Carolina.

The CMF Clearinghouse webinar will take on Thursday, Dec. 13 from 2-3:30 p.m. EST. Registration for the free webinar is available at Additional information on the CMF Clearinghouse is available at

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