Here's one way to reduce traffic congestion.

[Praktica]

Singapore population is a bit more than all of NZ fit into a largely flat land mass 1/7 the size of Auckland. So looking at their public transport systems and saying Auckland should copy Singapore isn't really fair.  Auckland's long, thin, hilly layout and relatively sparse population makes good economical public transport next to impossible.

Get used to the idea - in the foreseeable future using cars will be next to impossible. Then people will whine about the huge cost of providing alternatives, in spite of opposing them for decades...