All paved sidewalks abutting or adjacent to public streets in the city are declared to be public sidewalks for use by the public generally, regardless of whether the land upon which they are constructed is dedicated to the public or is privately owned. It shall be unlawful for any person to use or obstruct public sidewalks so as to interfere with the use by the public, except in case of construction or other permitted special instances.
('58 Code, § 44.16) Penalty, see § 10.99
   Removal of unauthorized obstructions, see § 100.39