What does this road sign indicate?

Explanation

This is a prohibitory sign. It means motor caravans (campervans) and caravans may not use this road. The ban targets exactly those vehicles — other cars may pass, unless other restrictions apply. Such a sign usually appears where the carriageway is narrow, manoeuvring is tight, or in residential zones and places that aim to limit campervan and caravan traffic. If you are driving a campervan or towing a caravan, you must not go on and should take a detour.