49% of crashes at roundabouts involved cyclists

It specifically addresses the "look but didn't see" problem, and how the Australian design makes that worse: Herslund & Jørgensen videoed cars and cyclists at roundabouts and noted that bicycles are often located in drivers’ peripheral vision. They suggest that experienced drivers use fast search strategies such as concentrating on where cars usually are, so may be more prone to LBFTS collisions than less experienced drivers.