Section 21-705 - Emerging from and entering alley, driveway, or building(a) The driver of a vehicle emerging from an alley, driveway, or building shall stop immediately before driving onto a sidewalk or onto the sidewalk area that extends across the alley, driveway, or building exit.(b) The driver of a vehicle emerging from an alley, driveway, or building shall yield the right-of-way to any pedestrian.(c) The driver of a vehicle emerging from an alley, driveway, or building shall on entering the roadway, yield the right-of-way to any other vehicle approaching on the roadway.(d) The driver of a vehicle entering an alley, driveway, or building shall yield the right-of-way to any pedestrian.