The Northland Corridor is a 100km stretch of highway connecting Auckland to Northland, split into three stages.
The Warkworth-Te Hana road is expected to be finished by 2034.
Phase two focuses on Te Hana to Port Marsden, including the alternative to the Brynderwyn Hills, and phase three is Port Marsden to Whangārei.
The 17km Brynderwyn Hills section between Kaiwaka and Waipū is being prioritised for route protection and regional resource consents to address “critical resilience issues”, Robertson said.
Focusing on the Brynderwyn Hills alternative section would provide the long-term solution to severe slips and road closures, he said.
“Pushing on with route protection will give landowners more certainty, support future planning, and enable a flexible delivery pipeline for the full corridor between Te Hana and Whangārei,” Robertson said.
The NZTA board endorsed the Northland Corridor Te Hana to Whangārei investment case last August, meaning the project could progress to route protection.
This ensures a credible pipeline of high-value infrastructure projects is ready when funding is confirmed over future years.
Jenny Ling is a senior journalist at the Northern Advocate. She has a special interest in covering human interest stories, along with finance, roading, and social issues.