When entering a main road from an unpaved (dirt or gravel) road, what is the right-of-way rule?

1. Vehicles on the unpaved road have right of way if they are on the right side
2. Both drivers must stop and the vehicle with larger mass proceeds first
3. The paved road vehicle must stop and flash lights to grant entry
4. Vehicles emerging from the unpaved road must yield to all vehicles on the paved road