Angry drivers have been seen dragging Just Stop Oil protesters from the roads as the group block traffic in London for the ninth day in a row.
One of the activists needed medical treatment after being forcibly removed by a motorist, the climate action group said.
Just Stop Oil has been blocking a number of roads around Westminster since October 1 in protest at the continued use of oil and gas, despite the huge impact it's having on the planet.
The group, who say the protest will last all month, want the UK government to stop issuing new gas and oil licences.
The Metropolitan Police said they arrested 45 activists for "willful obstruction of the highway" today, while yesterday 24 people were taken into custody.
A number of motorists were left furious by the blockades, with some taking matters into their own hands, trying to forcibly remove the activists from the road.
Footage shows some of the protesters, who all wore luminous orange vests, being pushed or dragged towards the pavement.
A driver can be heard shouting: "I have to go to hospital... stop interfering with us!"
One piece of footage also shows a white van drive at speed towards a group of protesters, before breaking suddenly just a few centimetres from them.
Another piece of footage shows a protester climbing on top of a police van with a Just Stop Oil banner, reportedly gluing himself to the roof.
He told passers-by: 'I'm angry. Sad... Where's the outrage?'
In a statement released today, the group said: “We are not backing down. Today, the Occupation of Westminster enters its 9th day. Massive disruption has been caused throughout the borough with multiple bridges and key A roads repeatedly blocked.
“Yesterday, a group of Just Stop Oil supporters remained resolutely nonviolent when confronted by the understandably frustrated members of the public.
“One supporter required emergency medical treatment due to having been removed from the road by a member of the public."
One man who was filmed being arrested during the protests, told a reporter he "lived round the corner" and had just come to congratulate the activists when he was detained.
Yesterday Animal Rebellion (AR) activists also protested, vandalising hunting shops.
Campaigners poured red paint inside Farlows, a hunting and fishing shop on Pall Mall, and daubed paint on the windows of William Evans, a shooting supply shop in nearby St James's Street, while others took and emptied milk from supermarkets.
The group, an offshoot of Extinction Rebellion, describes itself as a "mass movement using non-violent civil disobedience to call for a just, sustainable plant-based food system".
