A tram has stopped in the middle of the roadway at a tram stop without a boarding platform. What must a driver approaching in the right lane do?

1. Overtake the tram on the left side.
2. Stop and yield right-of-way to pedestrians walking between the sidewalk and the open doors of the tram.
3. Sound the horn and drive through between the tram and the sidewalk at low speed.
4. Proceed without stopping if no pedestrians are currently standing in their specific lane.