Auckland selects underground light rail to support city’s growth
https://www.railwaygazette.com/light-rail-and-tram/auckland-selects-underground-light-rail-to-support-citys-growth/60827.article
When I visited Auckland, I had to use bus service from the airport.
After completion of the light rail, we can head for downtown of Auckland by train.
But, judging from the population density, I guess it would be better to build branching line from Otahuhu to reduce construction cost and operation cost.