Work is about to start on the slip below the road on State Highway 35 at Raukokore in the eastern Bay of Plenty.
The work is sheduled to start tomorrow after crews were diverted to help with reopening the highway at the Waioeka Gorge.
Engineers are also currently designing the retaining works for the Motu underslip and the slump in the road near Raukokore.
Once this is complete work will also start at these two sites.
The New Zealand Transport Agency said all of these sites involved complex engineering problems that need a lot of planning and testing to ensure the solutions are long term.