What does the blue S-1 vertical sign located on a motorway indicate?

Correct answer

The end of a motorway

The blue S-1 sign in the image indicates that a motorway begins. From that point, the specific rules for this type of road apply. The general maximum speed becomes 120 km/h unless another sign indicates a lower speed. Pedestrians, cycles, mopeds and animal-drawn vehicles may not enter. Entry is made via the acceleration lane, giving way to vehicles already travelling on the motorway. The symbol on this sign may announce the approach to a motorway or indicate the branch of an intersection leading to a motorway.