Anyone who has had the displeasure of finding a parking spot in a major city knows it can take a very long time to strike gold. Los Angeles residents sacrifice more than 80 hours a year hunting for a place to leave their cars and from London to Frankfurt, the situation in other urban centers is not much better. Though they're individually tiny, parking spots quietly play a dominant role in shaping urban landscapes. Most US cities dedicate at least 25% of their developable land to them. Some,