(Source: In Transition via Planetizen)

By some estimates, the only thing Ferraris, Hummers and Priuses have in common is that 95 percent of the time they’re all going nowhere. Though idleness would seem to be the most benign aspect of America’s automotive fleet, UCLA Planning Professor Donald Shoup has written 733 pages that say otherwise. Because when cars aren’t going, they are parked somewhere, and when they are parked in one place, an average of six spaces per car nationwide stand vacant. Shoup considers the proliferation of parking spaces to be a plague on American cities, and because the vast majority lie open for the taking, they represent the largest devaluation of real estate short of the subprime mortgage crisis.

Published in 2005, The High Cost of Free Parking has begun to influence planners and policymakers in cities across the country.

Published in 2005, Shoup’s The High Cost of Free Parking amounts to an unwieldy volume full of data, regressions, and intricate analysis of these most overlooked squares on the grid of American cities. If America’s streets were a Monopoly board, it would be a dull contest indeed, with almost every space “Free Parking.” Each of the country’s roughly 200 million vehicles typically demands spaces at home and work, with shares of countless spaces at the market, restaurant, post office, mall and every other imaginable destination. Eighty-seven percent of all trips are made by personal vehicle and 99 percent of those trips arrive at a free parking space.