What does this traffic sign indicate?

This traffic sign indicates the end of the autobahn. In Germany, the autobahn is a high-speed highway where specific rules apply, including sections without speed limits. When you see this sign, it signifies that you are leaving the autobahn and returning to regular roads, where different traffic regulations, including speed limits and lane usage, will apply.

Understanding this sign is crucial for drivers to prepare for changes in driving conditions and regulations, ensuring safe transitions onto regular roadways.