Each individual terminal has its have sheltered taxi rank with supervisors readily available through peak situations to be certain a clean flow of taxis for travellers. These days I don’t bother and just go straight down the tube, the coach frequency is 10 minutes (or 15 if late at night) https://sydney-international-airp27281.snack-blog.com/30464542/detailed-notes-on-sydney-international-airport-taxi