ROADS and Maritime Services is advising motorists that the Alpine Way between two kilometres west of Thredbo to Khancoban remains closed after a recent rock fall next to the road - the second in only a few weeks.
Roads and Maritime Services (RMS) closed a 70 kilometre stretch of Alpine Way on Thursday morning to ensure motorist safety.
The rock fall occurred from the top of the slope at the same location where emergency work was carried out last month.
An assessment has found the site is unstable with the potential for further rock falls.
It will take at least three weeks to stabilise the site before the road can open to traffic.
Motorists intending to travel on Alpine Way between Khancoban and Thredbo near the National Parks and Wildlife Gate at Thredbo will be redirected to travel via the Snowy Mountains Highway via Tumut, Tumbarumba and on to Khancoban.
The detour is expected to add about three and a half hours to the journey and motorists are advised to delay non-essential travel.
Motorists are advised Alpine Way between Jindabyne and Thredbo Village remains open. Access to Khancoban town has been maintained from Tumbarumba and Corryong.
Another alternative travel route between Khancoban and Thredbo is via Elliott Way from Tooma and Mount Selwyn.
Traffic control measures and electronic signs are in place at Khancoban, Jindabyne and Tumbarumba to direct motorists.
Planning for new fencing which started after the existing fence was damaged last month will now incorporate the latest rock fall in proposed improvements.
Motorists are advised to drive with caution, obey all signs and the direction of traffic controllers and allow extra travel time.
RMS will continue to monitor and assess all slopes on Alpine Way for the safety of all road users.