Abstract
Some 634 accidents occurring in races sanctioned by the Sport Car Club of America (SCCA) are reviewed. Shoulder harnesses were used in 275 of the accidents. Inverted "Y" or double, separately anchored, shoulder harnesses were used almost exclusively. A significant decrease in the frequency and severity of injuries occurred after harnesses were introduced. Injury from the restraint system was very infrequent; submarining occurred only once.