You want to overtake. What is the right course of action now?

You chose correctly to refrain from overtaking the truck because you do not have a clear view over the necessary stretch of road. According to German traffic rules, overtaking on rural roads is only allowed when you have a clear and sufficient view ahead to safely complete the maneuver without endangering yourself or others.

The dashed center line indicates you may overtake if conditions are safe, but since the road curves and your view is limited, overtaking would be dangerous. The truck’s turn signals do not grant you permission to overtake—it might be signaling for other reasons, such as preparing to turn or indicating it is safe for others, but you must make your own judgment based on safety.

Reducing your distance to the truck to overtake faster is also unsafe because it reduces your reaction time and increases risk, especially in limited visibility situations.

The key rule is: never overtake unless you have a clear, unobstructed view of the oncoming lane over the entire distance needed to pass safely. Defensive driving means you prioritize safety over speed.