Earlier this month, the New York City Department of Transportation announced plans to experiment with 20 mph zones — replacing the city’s default 30 mph speed limit in one pilot neighborhood. Whoever gets the first 20 mph treatment will see benefits that residents of British cities and towns have become increasingly familiar with in recent years.
In the UK, some 3 million people live in areas with 20 mph speed limits. The experience there shows that not only do slower speeds save lives, but lowering the limit to 20 mph improves the way local streets function in more ways than one. According to the 20’s Plenty for Us campaign, the change has produced wide-ranging benefits, including less traffic, increased walking and biking, greater independence for children, the elderly and infirm, better health, and calmer driving conditions for motorists.
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