When entering a main highway from an acceleration slip lane in Bahrain, what is your legal duty regarding right-of-way?

1. Highway traffic must always stop and let you merge
2. You must adjust your speed, signal, and yield right-of-way to vehicles already traveling on the highway
3. You have automatic right-of-way once you reach the end of the slip lane
4. You must stop at the beginning of the slip lane and wait for all three lanes to clear