Frustrated by the growing danger of motor traffic, in the 1970s, residents of Delft’s Tuinstraat (“Garden Street”) illicitly erected barriers to curb traffic. They inadvertently invented the woonerf (living street), a common space for play and socialization, especially for kids. (Melissa & Chris Bruntlett, author of “Building the Cycling City: The Dutch Blueprint for Urban Vitality”)

Delft is a city in the province South Holland in the Netherlands.