NZ road construction is going on right now: they are building a 2.4 K tunnel which will be Australasia's longest road tunnel. Check out the videot:
more info at: http://www.nzta.govt.nz/projects/waterviewconnection/
What Auckland really needs is a new train commuter tunnel underneath the water connecting the city's main downtown business (the CBD) to the North Shore. Hopefully that will be done at some point.
A train to Auckland's north shore is REALLY needed! It was needed 20 years ago... In the mean time, I look forward to the Waterview tunnel.