What is the meaning of the following traffic sign?

- You have reached a section where fast vehicles should drive on the right lane and slow vehicles should drive on the left lane.
- Correct answer: You have reached the end of a special speed section.
- You have reached a section where parking is permitted on both sides of the road.
- You have reached a section where speed limit is temporarily changed from 50 k.p.h to 30 k.p.h.
Why this is the answer
The correct answer in the official bank: You have reached the end of a special speed section.
A black diagonal stripe across a round sign with a number marks the end of the section where that special speed limit applied. From this point on, the normal legal speed limit for the type of road and vehicle applies again. The sign does not set a new limit of 30 or 50 k.p.h, and it has nothing to do with parking or lane use.