The bicycle traffic in Amsterdam is insane. We saw hundreds of people (at least) everyday on bikes. I saw one person — one — wearing a helmet, and that was a small girl, maybe six or seven, on her own bike. No one wears helmets, not even toddlers in baby seats on the back of their parents’ bikes. Do people just not have accidents, or is there an abnormally high number of cyclists suffering traumatic brain injuries in the city?