Intra-city traffic: For passengers, they mainly rely on the red, yellow, and green buses. The red line mainly detours around Queen Street and is a free bus. The yellow line is the outer ring line (1.8-3.4 SGD). The green line is the inner ring line (1.8 SGD). The lines are at the airport and britomart transport centre. All three lines will report to the station. You can also tell the driver where you want to go, and he will remind you when you arrive.
Although it is a big city, public transport in Auckland is simple and easy to master.