Which vehicles are prohibited from using a road sign-posted like this?

The sign indicates a restriction for vehicles with an axle weight exceeding 2 tons. Specifically, it prohibits vehicles that have a permissible axle weight above this limit from using the road.

Your selected answer included a choice about permissible axle weight, which is important as it captures the intent of the sign. However, the option referring to actual axle weight was not selected. Since traffic regulations focus on permissible weights for safety and road preservation, recognizing both permissible and actual weights helps clarify which vehicles are limited on this road.

In summary, according to German traffic regulations, understanding the difference between actual and permissible weights is crucial for compliance with the sign's restrictions.