This study focused on rollover crashes in the US and UK. The rollover crash characteristics and injury distribution to belted occupants were compared for the US and UK. The UK has higher percentages of non-arrested rollovers with vehicle impact, lower percentages of arrested rollovers and non-arrested rollovers with object/topography impacts, and comparable percentages of "pure" rollovers (ground impact only), compared to the US. Both US and UK data show that rollovers are complex events. Of all seriously injured occupants in US rollovers, only 5% (with 95% confidence intervals of 3.5% to 6.7%) are belted front seat occupants with serious head/face/neck injuries, roof contact, and roof deformation coded at occupant position.