Much of the work was expected to be carried out in the school holidays, but the rain has meant work had moved into February.
The work was done at night to minimise disruption.
The spokeswoman said it was important to drive to the posted temporary speed limit during the day while new seals bed in.
“Please follow the speed restrictions and other traffic management plans in place as these keep road users and our workers safe as it means we can get work done as quickly and efficiently as possible,” she said.
The reseals were being carried out alongside ongoing safety improvements and the Takitimu North Link project.
NZTA appreciated any travel delays caused frustration and thanked people for their patience.