The Federal Motor Carrier Safety Administration's (FMCSA) safety goal is to reduce the number and severity of commercial motor vehicle fatalities and crashes. During the last several years, FMCSA has collaborated with the trucking industry to test, evaluate, and facilitate the deployment of several onboard safety systems for commercial motor vehicles to increase the safety of all roadway users. The purpose of this book is to evaluate costs and benefits for industry associated with Forward Collision Warning Systems that can reduce large truck rear-end crashes.