Last month, the agency said the section of SH36 had been patched for many years and required a full asphalt rebuild.
The southbound lane of SH36 was to be closed between Wikaraka St and Hall Rd for six weeks from March 9. Traffic was being detoured at Wikaraka St.
The closure would operate each week from Monday at 9am until Friday at 2.30pm.
There would be no weekend work and the southbound lane would reopen on Fridays at 2.30pm until 9am Monday, NZTA said.
Northbound traffic would continue to use SH36 with a reduced speed limit in place, while the detour would manage all southbound movement.
“We are working closely with our contractor to ensure the work is carried out safely and efficiently while minimising disruption as much as possible.
“Our priority is the safety of all road users and our work crews.”
NZTA said the one-way closure allowed crews to complete the work as efficiently as possible, minimising ongoing disruption.