To alleviate traffic congestion in municipalities, prevent the development of blight, and implement orderly plans for urban development and urban renewal, it is necessary that adequate and suitable space be reserved, particularly in central business areas, for parking facilities; which phrase is defined to include, but without limitation, all offstreet lots, sites, parking meters and other control devices, garages, ramps, and other structures and accessories, both aboveground and belowground, which are used or useful for the parking, delivery, fueling and servicing of automobiles and other motor vehicles, the collection of charges therefor, and the convenience of the patrons of the facilities. The withdrawal of a disproportionate amount of land for this purpose from use for commercial development and from the tax base of municipalities is undesirable and can be avoided, when the growth of business areas makes it economically feasible, by the construction of multilevel parking ramps and garages, and by making the space above, below, or adjacent thereto available for commercial development and use. It is the policy and purpose of the state to authorize and encourage municipal action, and cooperation of municipalities with public and private persons, firms, corporations, and limited liability companies in the acquisition, construction, improvement, development, extension, financing, operation, maintenance, and leasing of parking facilities, and of commercially usable space therein and adjacent thereto for the purposes and by the methods described in section 40-60-02.