Roof crush describes a vehicle’s roof as it is deformed during a rollover crash. According to some analysts, a collapsing roof can compromise all a vehicle’s safety features, including its seatbelts and side-curtain airbags. Partial or complete ejection of the occupants can result. This book is focused on automobile safety, specifically on the NHTSA rulemaking on vehicle roof strength standards to protect automobile passengers in the event of rollover accidents. Biomechanics and what occurs in a rollover, the relationship between the vehicle roof strength and the occupant injury risk, the history and efficacy of the National Highway Traffic Safety Administration’s roof strength standards in improving vehicle safety are all examined and discussed at length.