The sign you are referring to is known as the "End of a Detour" sign in Germany. This sign indicates the termination of a detour that was put in place due to roadworks, accidents, or other conditions that required vehicles to reroute.

According to German traffic regulations (Richtlinien für Verkehrsschilder), once you see this sign, it means that the usual path is now accessible again, and drivers can resume their normal route without the need to follow the detour. It is important for drivers to pay attention to this sign to ensure they follow the correct path and avoid unnecessary confusion.

If you have any additional questions about driving rules or related topics, feel free to ask!