Peak car
I'm part of this phenomenon. I don't own a car but instead cycle to work, use public transport a lot, taxis, and, on the rare occasions I need to drive myself, Zipcar. There are a lot of things I like about Zipcar but I'll point out two that are not directly economic: I don't need to worry about the car once I've finished with it (a real concern in a big city with vandalism, theft) and I can rent different size cars (5 seater for normal times, 7 seater if I have lots of guests).