With which vehicles are you not allowed to drive on a road sign-posted like this?

This traffic sign prohibits vehicles longer than 10 meters from driving on the road where it is posted. The red circle indicates a prohibition, and the truck symbol with the "10 m" means any vehicle combination exceeding 10 meters in total length is not allowed.

In your question:

- The car with caravan trailer having a total length of 11 meters is not allowed because it exceeds 10 meters.
- The tractor with trailer having a total length of 12 meters is also not allowed for the same reason.
- The truck with a length of 9 meters including load is allowed because it is less than 10 meters.

This rule ensures that long vehicles, which may be difficult to maneuver or be unsafe on certain roads, are restricted to prevent congestion or accidents. Always check length restrictions on signs like this to ensure your vehicle combination complies.