A report released by the Washington State Department of Transportation (WSDOT) explores the development of a new method for quantifying incident-induced travel delays using only volume data collected by traffic sensors in the Puget Sound region. Nearly 50 percent of freeway congestion in metropolitan areas in the U.S. can be attributed to traffic incidents. The ability to accurately quantify the incident-induced delay will allow policy makers and transportation professionals to better understand the real cost associated with traffic incidents, help develop more efficient incident management operation strategies, and develop effective active traffic management systems.