Contractors have cleared the slips and repaired the road but speed restrictions apply and traffic signals are operating in some places.
"Contractors continue to make substantial progress in reopening State Highway 6 to residents and road users," Waka Kotahi New Zealand Transport Agency said.
"Rocks Road is open to traffic in both directions and is subject to a 30km/h speed restriction.
"Cyclists travelling from Nelson to Richmond need to use the railway reserve walk/cycleway, while those travelling from Richmond to Nelson can ride on the road.
"Pedestrians can use the seaward side footpath in both directions.
"The road may be closed at short notice if geotechnical experts advise of the risk of slips or if there are weather issues. Road users should expect delays when using this route."
The highway remains closed between Hira and the French Pass turn-off.
Waka Kotahi said it aimed to reopen that last stretch tomorrow, weather permitting.
State Highway 63 between Blenheim and St Arnaud remains closed, as contractors work to repair a washed-out bridge over Branch River.
