You are returning on a tractor from working in a field and want to turn onto a road. What should you observe in order to avoid dangerous situations?

The selected combination is correct because each point plays a vital role in ensuring safety when turning onto a road, especially for a slow-moving vehicle like a tractor.

1. Keeping the windscreen clean is essential for maintaining visibility. A dirty screen can obstruct your view of oncoming traffic or obstacles, increasing the risk of an accident.

2. Avoiding places where drivers with the right of way cannot be seen from an adequate distance is crucial. This rule helps prevent collisions, as it ensures that you are not obstructing the view of approaching vehicles, allowing you to safely gauge the traffic situation before proceeding.

3. Being directed onto the road if your vision is restricted is also important. This applies to situations where obstacles, hedges, or other vehicles may hinder your ability to see oncoming traffic. If your view is blocked, waiting for assistance or a clear indication to proceed can help prevent dangerous situations.

Together, these points align with the principles of safe driving outlined in the German traffic regulations, emphasizing the importance of visibility and awareness when interacting with other road users.