In medium- and large-sized cities, such as cincinnati, indianapolis, chicago, and new york, many residents have been getting rid of their cars. keeping a car in a city can be very expensive and quite a hassle due to a lack of parking and strong parking regulations that lead to expensive tickets for even minor parking infringements. residents have learned that they can join services, such as zipcar, that allow them to "borrow" cars from a fleet when they need them. they pay a monthly fee for the service, and they use an online application to "reserve" a car for when they need it. all of the hassle is gone; the car is ready for them when they need it; and parking is always guaranteed. zipcar and other companies like it are examples of