Two assumptions undergird urban parking policy: Without convenient parking, car owners would be reluctant to patronize businesses; and absent a dedicated parking spot for their vehicle, they鈥檇 be less likely to rent and buy homes. Because parcels of urban land are usually small and pricey, developers will build multistory garages. And so today, a glut of these bulky concrete boxes clutter America鈥檚 densely populated cities.