What does this traffic sign indicate?

You selected the correct answer. This traffic sign with a red diagonal line through a white car on a blue background marks the end of a clearway for motor vehicles only. It indicates that the special rules and privileges for motor vehicles on this particular road section no longer apply from this point forward. It is not the end of the autobahn, and it does not mean all motor vehicles are prohibited. Recognizing this sign helps you know when specific driving regulations are no longer valid.