Bicycles emerging from an alley, driveway, or building within the city shall upon approaching a sidewalk or the sidewalk area extending across any alleyway, or driveway yield the right-of-way to all pedestrians approaching on the said sidewalk or sidewalk area; and upon entering the highway shall yield the right-of-way to all vehicles approaching on said highway.
('71 Code, § 5-9) Penalty, see § 70.99