The Waioeka Gorge will re-open at midday today, but only in daylight hours, after a rockfall blocked the vital East Coast route last weekend.
The New Zealand Transport Agency said the road would open between 7.30am and 5pm.
The road will initially open to a single lane at the slip site and there will be stop/go traffic management in place. The site will be continuously monitored to ensure the area remains safe for people to travel through.
NZTA Regional Transport Systems Manager Rob Campbell said contractors had done a great job at clearing the 7000m3 of material that came down with the slip on Sunday, but they needed to be confident the slip site was safe before removing all safety precautions.
"We know these restrictions are frustrating and we understand the impact on the region of this vital route being closed and restricted.