What is correct from this traffic sign onwards?

This traffic sign is a "No Entry" sign (in German, "Verbotszeichen"). It indicates that vehicles are prohibited from entering a certain area. This might be due to reasons such as pedestrian zones, restricted traffic areas, or other safety and regulatory measures.

In essence, if you see this sign, you must not proceed any further with your vehicle. There may be additional regulations or exceptions noted on other signs nearby, so it's important to pay attention to all traffic indicators in the vicinity. Following this sign ensures safety and compliance with local traffic laws.