“The British Medical Journal published a paper about the effect of 20 mph traffic zones on road injuries in London…
Results: The introduction of 20 mph zones was associated with a 41.9% (95% confidence interval 36.0% to 47.8%) reduction in road casualties, after adjustment for underlying time trends. The percentage reduction was greatest in younger children and greater for the category of killed or seriously injured casualties than for minor injuries. There was no evidence of casualty migration to areas adjacent to 20 mph zones, where casualties also fell slightly by an average of 8.0% (4.4% to 11.5%).
Conclusions: 20 mph zones are effective measures for reducing road injuries and deaths.”
It’s unconscionable to have this information available and not make changes to save people’s lives.
By enacting effective traffic calming measures, communities may allow cars and pedestrians to exist harmoniously, greatly reducing the likelihood of serious injury or death. The U.S. would do well to emulate Germany’s example which of “Spielstrasse“, or play streets, in which the pedestrian may use the entire street and the speed limit is walking pace. Speaking to Momentum magazine, play street resident Anne Arnold-Winkenbach observes “that drivers sometimes go too fast down the street… Ten (6.2 mph), 15 (9.3 mph), sometimes even 20 km/h (12.4 mph).”
Authors of the British study note that “20mph zones in London save 200 lives a year, but this could increase to 700 if plans to extend the zones were implemented.”