This traffic sign indicates 'No overtaking for lorries,' and the restriction starts in 500 meters.

The restriction is for lorries with a total weight above 3.500 kg overtaking motor vehicles with more than two wheels. Overtaking on the right side is permitted by normal traffic rules.

In this question, the answers look quite similar, but they mean different things. Always read both the questions and the answers carefully and make sure you understand the differences before answering.

Also, learn the difference between the various supplementary signs. They can be quite easy to mix up.