Abseilers are removing loose rock on exposed by a landslip in the Manawatu Gorge last Thursday.
The slip is blocking State Highway 3 through the gorge, which will remain closed until the mass of unstable rock has been removed.
New Zealand Transport Agency regional journey manager Delaney Myers said abseilers had brought down a large overhang this morning and work was continuing.
"We're thrilled that the crews are making such good progress, and we're hopeful that the road can be safely reopened within the two week timeframe," Ms Myers said.
"We appreciate that every day the gorge is closed, it creates disruption for thousands of people. We are working as quickly as possible to remove the loose rock to ensure motorists remain protected. We thank the public for their patience while we get this work done swiftly but safely."
Work is underway on a $4.5 million upgrade to the alternative route via Saddle Rd, which means motorists will be passing through 30km/h worksites.
"We urge everyone to follow these speed restrictions safely, as with increased traffic we need to be super vigilant about keeping the Saddle Rd safe for both motorists and workers.
"It's also crucial that everyone drives through Ashhurst with the same care that they'd expect others to drive through their own neighbourhood. This is a residential area and the streets are busy with children and their families enjoying the school holidays."