It marks the line of the road’s edge, where curbstones are absent

What is the meaning of the following road marking?

1. Correct answer: It marks the line of the road’s edge, where curbstones are absent.
2. Driving is prohibited between the yellow lines.
3. Parking is allowed on the left side of the line, on a freeway.
4. Parking is allowed on the right side of the line, on a freeway.