The sign you mentioned pertains to parking regulations in Germany.

It indicates the start or end of a parking area. If the sign is marking the start of a parking area, it means that parking is permitted in the designated area ahead, typically to the right side of the road. Conversely, if it marks the end of a parking area, it signifies that parking is no longer allowed beyond this point.

In general, these signs help drivers understand where they can legally park their vehicles. It's crucial to pay attention to these signs to avoid fines or towing.

If you have any specific questions about parking rules or need clarification on any other traffic sign, feel free to ask!