The traffic sign "Prohibition for passenger cars with trailers" is a circular sign featuring a red border and a pictogram of a car with a trailer. This sign indicates that passenger cars equipped with trailers are not allowed to access or travel on the road where the sign is posted.

The purpose of this sign is to ensure road safety by preventing vehicles that may have difficulty maneuvering or stopping quickly from entering certain areas, such as narrow roads, pedestrian zones, or locations where the road structure cannot support the weight of such vehicles.

When you see this sign, you must adhere to the prohibition and look for alternative routes that allow vehicles with trailers. Ignoring this sign could result in fines or other penalties, and it could pose safety risks for other road users. Always pay attention to local regulations and road conditions when driving.