From the current issue of the Economist:
"Parking spaces seem innocuous, just a couple of lines painted on asphalt. Multiplied and mismanaged, though, they can create traffic jams, worsen air pollution and force cities to sprawl. The cost and availability of parking affects people’s commuting habits more than the rapid buses and light-rail lines that cities are so keen to build (see article). Next to other worthy policies like congestion-charging and road-tolling, parking is also easy to change. The fast-growing metropolises of Africa and Asia, especially, need to get it right, before they repeat the West’s debilitating mistakes."