“During the 1950s-60s, the rise in automobile traffic transformed Dutch cities, resulting in traffic congestion, pollution, & an alarming increase in crashes. In 1971, more than 3,300 people lost their lives in crashes, including 400 children. These shocking numbers led to public protests…” Change. https://nowsustainability.com/the-bicycle-revolution-in-the-netherlands-how-cycling-transformed-the-country/