Police and protesters were in a stand-off on Hill Street near Parliament late on Wednesday night.
About 20 officers, some holding riot shields, lined up across the road with a 20-metre gap between them and a tightly packed group of demonstrators.
The protesters were mainly calm and began singing while officers watched.
But there was some pushing between about 40 officers and 100 protesters when a forklift tried to move one of the concrete blocks forming a barricade across Lambton Quay.
About 10pm, police also towed a car at Bowen Street.
One person was arrested today for disorderly behaviour.
In a statement just before 10pm, police said the cordon surrounding the protest site would continue to be reduced over the coming days.
"A visible presence will remain at Parliament this evening as police continue to monitor protest activity."
Police said they towed a vehicle that attempted to enter the protest area at Bowen Street near the cenotaph this afternoon.
Vehicles and people at the protest continued to decrease, as some have chosen to relocate their vehicles to Sky Stadium, police said.
Earlier today, Sky Stadium chief executive Shane Harmon confirmed the designated parking area for anti-mandate protesters at the stadium would be removed tomorrow, and parking fees would resume.
Meanwhile, some protesters have been trying to serve bogus trespass notices on the Capital's urban marae.
Local iwi collective Taranaki Whānui said it invited Māori wardens and police to Pipitea Marae to discuss a peaceful resolution to the occupation around Parliament.
Chairperson Kara Puketapu-Dentice said some protesters abused tikanga by attempting to hand out trespass notices.
He said only the elected leaders have the mandate to speak for their whenua.
Police said they would continue to maintain reassurance patrols, with assistance from Māori wardens.