What is the meaning of a circular traffic sign with a white background, red border, a red diagonal slash, and a black silhouette of a freight truck?

1. No Freight Trucks Allowed: prohibits all freight vehicles from entering or passing through the roadway
2. Truck Parking Permitted: indicates a dedicated freight loading and parking area
3. Truck Lane Ahead: directs freight vehicles to merge into the right lane
4. Dangerous Goods Route: designates a mandatory route for hazardous cargo transport