Watch: A fly-through of Auckland's Waterview Tunnel
Future commuters have been given a flying trip through the largest and most expensive infrastructure project in New Zealand.
The $1.4 billion Waterview Tunnel project in West Auckland is due to be completed early next year and includes twin 2.5km long tunnels.
It is the biggest infrastructure project ever undertaken by the NZ Transport Agency with around 1000 people working on it every day since construction began in June 2012.
The north and southbound tunnels are three lanes wide and at the deepest point, dip to 50m below ground level.
* Waterview connection heading towards completion
A 14-second video released on Tuesday, starts at one entrance, flies through the tunnel which is still full of cones and construction equipment, and out the other end.
The overhead shots show the scope of the project.
Tonkin + Taylor design manager Peter Norfolk said the project will have a huge impact on Auckland.
"[It] will have a similar impact as to what the Harbour Bridge did for the North Shore in terms of the life and the ability it's going to bring to this part of the city."
Tonkin + Taylor is part of the Well-Connected Alliance that designed and is constructing the Waterview Connection.