During a period of ten years, ACIR has amassed a large accident sample, drawn from a total of 28 states. Statistical analysis has aimed at (1) identification of leading injury sources and (2) statistical evaluation of car safety features. Studies show that ejection, the steering wheel, instrument panel, and the windshield are the four categories most often associated with car occupant injuries.
Countermeasures include seat belts, safety door latches, recessed-hub steering wheels, and instrument panel padding. Studies have shown partial-to-substantial countermeasure effectiveness for seat belts, safety door latches, and instrument panel padding. Analysis of other safety devices is under way.