Abstract
This article describes the development and implementation of a CaliforniaDepartment of Transportation (Caltrans)-specific version of ShakeCast, a postevent software analysis tool. The ShakeCast system has proved a valuable tool for Caltrans in postearthquake response during real events and inscenario planning exercises. ShakeCast facilitates the complicated assessment of potential damage to widely distributed facilities and has drastically reduced Caltrans' response time to assess potentially damaged structures after an earthquake.