The driver of a vehicle emerging from an alley, driveway or building shall stop such vehicle immediately prior to driving onto a sidewalk or onto the sidewalk area extending across any alleyway, sound his or her horn, yielding the right-of-way to any pedestrian as may be necessary to avoid collision and, upon entering the roadway, shall yield the right-of-way to all vehicles approaching on said roadway.
(2005 Code, § 61.25)