It shall be unlawful and an offense for any person, firm or corporation to construct, erect, operate, maintain or permit to exist any merchandise, business or any tools, stand, equipment or appurtenances thereof, any radio, aerials, poles or wires therefor, whether permanent or temporary, or any other obstruction, upon any part of any public street, alley, boulevard, parkway, sidewalk, curbing or parking within the city. (1980 Code § 19-2; amd. 2002 Code)