You want to enter a road displaying this road sign. To what does the information "12 t" refer?

The "12 t" road sign indicates a weight limit for vehicles, specifically stating that vehicles exceeding 12 tonnes are not permitted to enter that road.

In the context of your previous answer options:

1. Actual weight of the vehicle: This refers to the weight of the vehicle at any given moment. It is relevant since a vehicle's actual weight should not exceed the limit to enter.

2. Gross vehicle weight rating of the vehicle: This is the maximum weight a vehicle can safely carry, including its own weight plus cargo and passengers. This is also relevant as it determines if the vehicle is compliant with the weight limit.

3. Unladen weight of the vehicle: This is the weight of a vehicle without any load. While it provides information about the vehicle's weight, it doesn’t directly relate to the restrictions imposed by the sign regarding maximum weight with load.

Choosing both the first two options is necessary because the sign pertains to weight limits, which encompass the actual and gross vehicle weights. Understanding these distinctions is crucial for compliance with German traffic regulations and road safety.