The sign "Prohibition for vehicles exceeding specified actual length" in Germany indicates that vehicles longer than a certain length are not allowed to enter a specific area or road. This restriction is often implemented in places where narrow roads, low bridges, or limited turning space make it impractical or unsafe for longer vehicles to navigate.

The length limit is typically indicated in meters or feet on the sign itself, and it's important for drivers of longer vehicles, such as trucks or buses, to pay attention to this sign to avoid potential hazards like getting stuck or causing accidents in restricted areas.

Always ensure to follow such signs to comply with traffic laws and maintain safety on the roads. If you have any more questions about traffic rules or need further clarification, feel free to ask!