State Highway 2 through the Waioweka Gorge will be closed overnight from Sunday 21 June, while crews undertake further stabilisation works at the Goldsmith Slip site.
The road will be closed for 10 nights, from Sunday to Thursday, between 9pm and 5am.
NZTA said there will be no work on Friday or Saturday nights.
It said a one-hour window from 1am to 2am will allow freight through.
During the day, stop/go traffic management will be in place.
Crews are operating a large crane to carry out drilling and installation work for a rockfall barrier, the transport agency said.
"From early July, installation of the steel net will begin," it said.
"This work will be carried out during the day under the current stop/go traffic management in place at the Goldsmith Slip."
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