Despite all the harm off-street parking requirements cause, they are almost an established religion in city planning. Without a theory or data to support them, planners set parking requirements for hundreds of land uses in hundreds of cities—the ten thousand commandments of planning for parking. Planners have adopted a veneer of professional language to justify the practice, but planning for parking is learned only on the job and it is more a political activity than a professional skill.
—Donald Shoup, in “Parking Reform Will Save the City”