(a) Any tree or shrub which overhangs any sidewalk, street or other public place in the City so as to impede or interfere with traffic or travel shall be trimmed by the owner of the abutting premises or of the premises on which the tree or shrub grows so as to remove the obstruction. Traffic vision shall be made to conform to the subdivision and zoning regulations of the City.
(b) Any tree or limb of a tree which is likely to fall on or across any street, sidewalk or other public place shall be removed by the owner of the premises on which such tree stands.
(c) The City may trim or remove any tree or shrub which obstructs or endangers traffic or travel on any street, sidewalk or other public place, or any sub-surface utility provided for public use.
(`91 Code, § 6-55)