"It's more than just about a road, it's about all those community facilities and that's what we do on all our projects now."
"We're really proud of what we've achieved."
The tunnels will connect the Southwestern and Northwestern Motorways, and provide a direct connection between the airport and CBD.
The country's largest road freight organisation, National Road Carriers, said the tunnel is an important step in the continuing development of Auckland's road transport network.
"We welcome the opening of the tunnels, the fruition of the western ring route, which the NRC has been advocating for, for 30 years," said National Road Carriers chief executive David Aitken.
Aitken said NRC don't expect the tunnels to put an end to all the city's congestion problems, "but it reinforces the importance of maintaining the momentum to complete other missing links in the motorway network."