It is unlawful to park a vehicle within an alley in such a manner or under such conditions as to leave available less than ten feet of the width of the roadway for the free movement of vehicular traffic, and it is unlawful to stop, stand, or park a vehicle within an alley, in such position as to block the driveway entrance to any abutting property.
('72 Code, § 725:27) Penalty, see § 10.99