In 2009, Zipcar took 250 participants from across 13 cities — and they're all self-confessed car addicts and car-sharing rookies — and got them to surrender their keys for a month.
En 2009, Zipcar tomó 250 participantes de 13 ciudades, ellos se consideran adictos a los autos y novatos compartiendo coches, y tuvieron que entregar sus llaves durante un mes.