What is the meaning of the following traffic sign?

1. You have reached a section where fast vehicles should drive on the right lane and slow vehicles should drive on the left lane.
2. Correct answer: You have reached the end of a special speed section.
3. You have reached a section where parking is permitted on both sides of the road.
4. You have reached a section where speed limit is temporarily changed from 50 k.p.h to 30 k.p.h.

WhyA crossed-out number marks the end of a special speed section. After it the normal limit for that road applies.