When researching urban sustainability, I came across Vauban, a neighborhood in the city of Freiburg, Germany, that's inhabitants have mutually decided to go as car-free as possible. Seventy percent of households don't have a car and many of the residents gave up their cars before moving to the neighborhood. This innovation is completely scalable, at least in cities. Vauban has made this possible by having great, reliable public transit, limiting the available parking space and providing car-share services, among other things.
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