Serious head injuries are a major concern in light passenger vehicle rollover crashes. There are efforts in the US and Australia to assess the feasibility of developing a dynamic rollover test to evaluate the crashworthiness of a vehicle in a rollover. However, detailed information about the characteristics of serious head injuries in single-vehicle single-event, i.e. pure, rollover crashes, and regarding the capabilities of the dynamic rollover test devices chosen for the separate US and Australian investigations, is lacking.