What must a driver do before emerging from an alley or building onto the sidewalk?

Before emerging from an alley or building onto the sidewalk, a driver must come to a complete stop to ensure the safety of pedestrians. This action allows the driver to have a clear view of the sidewalk and assess whether it is safe to proceed. Stopping helps in confirming that no pedestrians are approaching or crossing in that area, thus preventing potential accidents.

While yielding the right of way and signaling can also be important actions in the context of driving, the immediate requirement when exiting an alley or building onto a sidewalk is to stop first. This pause is crucial, as it gives the driver the opportunity to take note of the surroundings and ensure that it is clear to emerge safely. It reflects the responsibility drivers have to be cautious when transitioning from a less visible area, such as an alley, to public pedestrian spaces.