Oooops
Well it was triumphed as getting traffic moving to the airport. Yesterday at 6am the Kirkbride/SH20A underpass was opened to traffic and at 6:15am it went all to crap:
This is this morning:

And of course from earlier this year:

http://www.radionz.co.nz/news/national/320905/truck-crashes-delay-traffic-to-auckland-airport
Essentially the underpass at Kirkbride Road gets you to the next jam one kilometre down the road while cutting off an access road for logistic trucks to the main road(Montgomerie Road is now closed from SH20A).
Maybe building that Airport Line in the first place might have saved a lot of this hassle….

Source: The Spinoff