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Concern about crash conditions other than frontal and side crashes has accelerated restraint development with respect to rollover events. Previous analysis of rollover field data indicates the high probability of ejection and consequent serious injury or death to unbelted occupants. Partial ejection of belted occupants may also occur. Restraint development has focused on belt technologies and more recently, airbag systems as a method to reduce ejection and injury risk. Effective restraint development for these emerging technologies should consider a combined approach of field injury data analysis, computer simulation of rollover, corresponding validated test data and hardware development techniques. First, crash data was analyzed for identified rollover modes (crash sequences) and injured body regions. This helped to determine possible restraint interventions.