The Manawatu Gorge is fully cleared of slip debris, nine months after it was closed following a massive slip.
Workers were now focusing on getting the road ready and safe for motorists, New Zealand Transport Agency Palmerston North state highways manager David McGonigal said.
The road was closed on August 18 last year because of a slip. It reopened for three days before another, massive slip closed it again.
A one-lane road would open later this month.
Mr McGonigal said 370,000 cubic metres of dirt was moved, enough to fill a bathtub in every New Zealand household.