What does this traffic sign indicate?

This traffic sign prohibits motor vehicles that are carrying dangerous goods and must display specific hazard markings (orange warning panels). Such vehicles are not allowed to enter or use the road beyond this sign.

The rule helps prevent accidents involving hazardous materials in areas where it may be unsafe for them to travel, protecting public safety and the environment. In contrast, this sign does not restrict vehicles based on weight or general truck type, only those with dangerous goods warnings. Understanding this distinction is important when identifying signs that regulate hazardous cargo specifically.