What is the primary function of triangular road signs with a white background and a red border in Armenia, and at what distance are they typically placed before the hazard in settlements?

1. They impose mandatory speed limits and are placed 10 to 20 meters before the hazard.
2. They warn drivers of an upcoming hazard on the roadway and are installed 50 to 100 meters before the hazard in settlements.
3. They grant right-of-way at upcoming intersections and are placed 200 to 300 meters in advance.
4. They indicate service locations and parking facilities and are installed 500 meters before the exit.