The driver of a vehicle within a business or residence area, 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 or driveway, and shall yield 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 such roadway. Violation of any provision of this section shall be an infraction.