"The new commercial access road is going to take the commercial vehicles and taxis off George Bolt ... which is going to free up the pick up and drop off area because the traffic can get quite heavy down there," an airport spokeswoman said.
As well as freeing up traffic for the public, the new network would improve access to taxis from the Jetstar and Air New Zealand forecourts.
The $1.8b investment in aeronautical infrastructure over the next five years is expected to reduce average international passenger charges by 1.7 per cent in real terms each year while domestic passenger charges will increase by 0.8 per cent per annum.
According to the company, its new prices for the 2018-2022 financial years will target a return on investment of 6.99 per cent.