What is the meaning of this road sign?

- Parking in the section following the traffic sign is prohibited for all commercial vehicles.
- Parking is prohibited for commercial vehicles with an all up weight of more than 8,000 kg.
- Parking in the section following the traffic sign is prohibited for commercial vehicles with an all up weight of more than 4,000 kg.
- Correct answer: Parking in the area following the traffic sign is prohibited for commercial vehicles with an all up weight of more than 10,000 kg.
Why this is the answer
The correct answer in the official bank: Parking in the area following the traffic sign is prohibited for commercial vehicles with an all up weight of more than 10,000 kg.
The sign shows a heavy truck in a blue circle with a red border and a red diagonal line, and it is placed at the entrance to an area. So the prohibition applies throughout the area, not only where the sign stands. It prohibits parking of a commercial vehicle whose permitted all up weight is more than 10,000 kg, not of every commercial vehicle.