Whangarei Mayor Sheryl Mai said she considers State Highway One between Auckland and Whangarei to be a neglected regional road.
Her comments come after Prime Minister Jacinda Ardern this week poured cold water on nine of the highway projects National proposed in the lead up to the election, saying neglected regional roads were more worthy of taxpayer money.
Among those proposals was the continuous four lane extension of the highway between Warkworth and Whangarei.
Read more: Jacinda Ardern cool on four-lane highway to Northland proposals
"I agree with Prime Minister Ardern that neglected regional roads need investment. The highway between Auckland and Whangarei is one of those," Ms Mai said.