Slow down: Reduced speed limits save lives in busy cities

Traffic accidents are the leading cause of non-natural deaths worldwide. Lower speed limits may help prevent accidents. But speed-reduction policies can be controversial and effects are not well documented. A new study shows that speed reductions in São Paulo, Brazil, dramatically reduced fatal accidents and increased travel times only minimally.

source https://www.sciencedaily.com/releases/2020/06/200611183912.htm