How must you act when driving a vehicle during permitted delivery times?

This sign indicates a pedestrian zone where delivery vehicles are permitted (“Lieferverkehr frei”). When driving in such an area during allowed delivery times, you must always drive at walking speed and pay special attention to pedestrians at all times. Both answers 1 and 2 are correct: walking speed is required for safety, and extra caution towards pedestrians is necessary because they have priority in these zones. Even if no pedestrians seem immediately present, you must still maintain walking speed and be prepared for unexpected pedestrian movement.