You are leaving a building's underground parking garage and about to cross the sidewalk to enter the road. What is the most appropriate way to drive?

1. ①Sound the horn to warn pedestrians, then enter while keeping your speed.
2. ②Accelerate quickly to take advantage of a gap in traffic on the road.
3. ③If no pedestrians are visible, drive slowly onto the road without stopping.
4. ④Stop first, then drive slowly onto the road while checking that it is safe.