 With this service, cars are parked at major Metrorail stations and other convenient locations in the metropolitan area and made available for rental on an hourly basis, with the goal of reducing car dependency and congestion, improving the environment, and increasing transit ridership.In March 2012, Car2Go began offering service in D.C., initially providing 200 Smart cars for use everywhere within the District's city limits.The international car sharing company, which offers one-way rentals charged by the minute, increased their vehicle fleet to 400 in 2013.