As used in chapter 108, Laws of 1967, "urban public transportation system" means a system for the public transportation of persons or property by buses, streetcars, trains, electric trolley coaches, other public transit vehicles, or any combination thereof operating in or through predominantly urban areas and owned and operated by the state, any public agency, any city or county or any municipal corporation of the state, including all structures, facilities, vehicles and other property rights and interest forming a part of such a system.