Closed from 9.30am for removal of signage
The Mountain Road is reverting to a two-way system again today.
It will be closed from 9.30am until 4.30pm to allow for workers to take down cones and signage.
After that, traffic flow will be permitted between north and south in either direction.
Bicycles will also be allowed back on the roadway.
Police have reported at least three separate incidents of road users disobeying the one-way system over the last fortnight.