Under Article 48 of the Implementing Regulation, what is the right-of-way rule when joining a main road from a minor road or private property?

1. Vehicles on the main road must stop and yield to vehicles joining from private property
2. The vehicle traveling at higher speed always has absolute right-of-way
3. Vehicles joining from the right always take priority over main road traffic
4. The driver joining the main road must yield right-of-way to all vehicles traveling on the main road