What is the meaning of this sign?

1. End of a mountainous road.
2. Refreshment area for drivers. It is obligatory to turn on a blinking light, either yellow or red
3. Correct answer: Traffic cone, giving directions or marking an obstruction at a road works site.
4. Narrowing road.

WhyAn orange cone shows the direction or marks an obstacle in a road works zone. Follow it around.