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FHWA Highway Safety Programs

Engineering Speed Management Countermeasures: A Desktop Reference of Potential Effectiveness in Reducing Crashes November 2023

Engineering Speed Management Countermeasures: A Desktop Reference of Potential Effectiveness in Reducing Crashes November 2023

November 2023

This chart summarizes studies about the effectiveness of engineering speed management countermeasures in different scenarios. Studies where an increase in crashes was reported are also shown since this information is relevant to selection of countermeasures. For the most current information on Crash Modification Factors (CMF), please go to the CMF Clearinghouse at:: http://www.cmfclearinghouse.org.