Hundreds of police staff have this morning cordoned off the protest at Parliament in a bid to open some of the roads back up to Wellington.
Early today, about 3.30am, an operation involving 300 police staff and large-scale equipment took place to install concrete barriers to prevent further growth of the protest.
The barriers are also there to maintain access for residents, businesses and emergency vehicles.
A handful of people were arrested during the operation, which the police said happened with minimal disruption.
Police said they were maintaining a visible presence on site and anyone abusing or intimidating members of the public could expect to be arrested, removed and face charges.
"Several road closures and detours are in place for vehicle traffic in the vicinity of Parliament. We ask that commuters allow extra travel time to allow for any traffic delays," police said in a statement.
"Protesters' vehicles will be allowed to leave the area but will not be able to go back in once they have left.
"We will continue to maintain a highly visible, reassurance presence on site, and staff are engaging with the public and protesters to provide advice and, where necessary, take enforcement action.
"Anyone abusing or intimidating members of the public can expect to be arrested, removed and face charges."
The barriers are at:
- Hill Street
- Rear end of Parliament on Ballantrae Place
- Molesworth Street near Pipitea Street
- Murphy Street / Aitken Street
- Kate Sheppard Place
- Bunny Street near the railway station
- Corner of Whitmore Street and Lambton Quay, at the bottom of Bowen Street
- Lambton Quay / Mulgrave St