Seat belts are the best defense against impaired, aggressive, and distracted drivers. Being buckled up during a crash helps keep you safe and secure inside your vehicle; being completely ejected from a vehicle is almost always deadly.
The Le Mans Disaster remains the deadliest crash in motorsports history. During the 1955 edition of the 24 Hours of Le Mans, 83 people were killed when Pierre Levegh crashed his Mercedes-Benz 300 SLR into a spectator area on Circuit de la Sarthe's main straight.