The sign "Prohibition for motor vehicles over 3.5 tons" indicates that vehicles exceeding a weight of 3.5 tons are not allowed to enter or drive in the specified area. This restriction is usually put in place to protect road conditions, reduce traffic congestion, and minimize noise in residential or sensitive areas.

Drivers of such heavy vehicles must be aware of the signs and find alternative routes to avoid penalties. Always check for additional information that might accompany this sign, such as exemptions for delivery vehicles during certain hours. Understanding and adhering to this sign is important for safe and legal road usage in Germany. If you have further questions about traffic rules or other signs, feel free to ask!