A series called Moving Beyond the Automobile has done a piece on car parking in New York called parking reform. It outlines how cheap (often free) and plentiful on street parking in effect provides a subsidy to car drivers and questions whether there is a better use for the public space currently given away to cars for free. (Props to Reinventing Parking for posting it.)
Ideally, parking would happen off street in parking garages that charge a market rate, with some limited short term on-street parking for car drivers who need to make quick trips. Otherwise, it is normally ridiculious to use such a limited resource (street space) for the indefinite storage of automobiles.