You are driving in lane 1 of an expressway with three lanes each way and need to move over to lane 3 to take the exit ahead. What is the most appropriate way?

1. ①Turn on the turn signal well in advance and move over one lane at a time, checking safety each time.
2. ②Turn on the turn signal just before the exit and cut diagonally across from lane 1 to lane 3 in one move.
3. ③If you pass the exit, stop on the shoulder and reverse to it.
4. ④Even if a car is in the next lane, move over right away since it will make way once your signal is on.