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

The road sign indicates a restriction for vehicles longer than 10 meters. This primarily affects larger vehicles such as trucks and combinations of vehicles, including those with trailers.

In your case, the correct answer involves the following:

1. A car pulling a caravan trailer that makes the total length 11 meters exceeds the limit.
2. A tractor with a trailer totaling 12 meters also exceeds the limit.

The truck option, which is 9 meters including load, does not exceed the length restriction and is therefore allowed.

It's important to understand that these regulations help ensure road safety and prevent traffic congestion by keeping longer vehicles off certain roads where they may not be suitable. Always adhere to such restrictions to maintain safe driving conditions.