When a driver emerges from an unpaved dirt road (piste en terre) onto a paved national highway, what priority rule applies?

1. The driver coming from the unpaved dirt road must yield right-of-way to all vehicles on the paved road
2. The driver from the dirt road has priority over traffic from the left under priority-to-the-right
3. The driver travelling at the highest speed across the junction has right-of-way
4. Traffic on the paved road must come to a complete stop to let the dirt-road vehicle merge