The National Transportation Safety Board is furthering its accident investigation capabilities by implementing biomechanical tools and principles in its accident investigative process. Vehicle dynamics simulation is a commonly used investigative tool implemented to develop a complete understanding of how the vehicle moved and accelerated during an accident. Now the Safety Board is looking at both the reactions and actions of the occupants within the vehicle in response to the vehicle dynamics. This paper highlights two cases in which the principles and tools of biomechanics are applied to aid in the investigative process.

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