The National Road Carriers' Association has released a report it commissioned from TG Enterprises, which opposes shifting Ports of Auckland to Whangārei, saying it would be logistically impractical and cost-prohibitive to do so, while increasing greenhouse gas emissions.
The report, based on interviews with trucking companies and stakeholders, concluded that Auckland's port provided the best value for money and should continue in its current location until it could not cope with future growth, which it expected would be at least 30 years away.
But those lobbying for the move to Northport, including former Far North mayor Wayne Brown and Northland Mayoral Forum chairman Jason Smith, say the argument for the status quo lacks logic.
With a focus on road freight, the report said the issue was not port location but the efficiency and safety of road (and rail) access to the upper North Island ports of Northport, Auckland and Tauranga. It said servicing customers by road freight from Northport would be nearly eight times more expensive, or more than $1 billion annually, than from Ports of Auckland.
An analysis of road freight cost showed a container truck that made five trips a day between Ports of Auckland and South Auckland for $50 would be only able to achieve one from Northport, at an estimated cost of $230.