What must you be prepared for in this situation?

In the situation shown, it is important to be aware of several potential hazards.

1. Oncoming traffic may appear suddenly as you approach the truck. This is crucial because visibility can be obstructed, making it difficult to see vehicles coming from the opposite direction.

2. There is a risk that the truck driver could exit the vehicle and potentially step onto the road. This is vital for pedestrian safety and awareness of potential distractions on the roadway.

3. Traffic signs might be hidden behind the truck, which could affect your ability to make informed driving decisions. This underscores the importance of remaining alert and cautious when passing large vehicles.

Overall, it's essential to consider all these factors to maintain safety and comply with traffic regulations while driving. Each part of the answer highlights critical awareness needed when navigating around larger vehicles.