The road to Milford Sound has reopened following last week's avalanches but motorists are being urged to drive with extreme care.
The road has been closed from the Hollyford Rd turnoff since Tuesday, when it was covered in debris and damaged after more than 20 avalanches struck the area.
The NZ Transport Agency reopened the road for limited periods at the weekend, but closed it at night.
The agency said drivers needed to take extreme care on some sections of the road because of surface damage and the narrow carriageway, and should allow extra travel time.
The road is closed between 5.30pm and 7.30am.
Downer avalanche programme manager Wayne Carran said the work to clear 20 avalanches, a massive landslide and a boulder weighing up to 50 tonnes from the road had gone to plan.
"There are no issues right now and we aren't expecting the road to be reclosed," Mr Carran said.
"[It is] dependent on the weather but we are expecting the road to be completely cleared in another week to 10 days."
Meanwhile, difficult weather had caused further major slips on State Highway 6 between the Gates of Haast bridge and Haast Pass summit, but a single lane is expected to open today.
The road has been shut since Wednesday after major storm damage that caused rock falls to cover the road.
NZ Transport Agency West Coast area manager Mark Pinner said that on Friday night another major slip happened in the area, which took work clearing the road "almost back to square one".
Snow and heavy overnight rain brought down almost as much debris from a 50-metre-high slip at Diana Falls that led to the road being closed, he said.
Workers made the most of a break in the weather on Saturday afternoon, allowing a geotechnical engineer to see how much more slip material may have been destabilised.
"Three large boulders about the size of houses perched above the slip site are a concern and whether the latest heavy rain has affected their stability," Mr Pinner said.
However, good progress was made using helicopters to sluice the face and stabilise or push larger rocks to a point of safety. It was hoped a single lane would be open this afternoon if no further slips had happened.
The road will close during periods of the night and if there was more bad weather it was likely the road would shut again.
- © Fairfax NZ News
Check out what's on in your community or post an upcoming event.
Subscribe to a digital replica of The Southland Times.
Southland Times subscriber news and information.
Click here for information about advertising with The Southland Times.