Watch: Protesters from Insulate Britain covered in ink as they block A40
One driver ripped a banner out of the activists hands while another threw ink across the face of a man.
Police officers in Kent have already made 14 arrests while the Met Police confirmed 17 arrests after protestors glued themselves to the road, and to one another.
Footage posted to social media showed a group of officers following demonstrators towards the Dartford Tunnel and arresting them before they make it onto the road.
Christian, 77, was one of the demonstrators pelted with ink by an angry driver.
The retired doctor told Greatest Hits Radio London News: “It wasn’t painful, it didn’t hurt - it was unpleasant, but just sad, the whole thing’s sad, it’s sad that we have to do this.”
Traffic came to a halt in both directions on the A206 at Crossways Boulevard, Greenhithe.
One activist said she was prepared to lose her home and go to jail for the cause.
Suzie, 47, from Cambridge, who works in childcare, said: “If going to prison and losing my home is what it takes to get the Government to do the right thing and cut our carbon emissions then it’s a price worth paying.
“I can’t be a bystander while this Government betrays the public, our children and future generations by failing to defend our country from the climate crisis.
“Insulating Britain’s leaky homes has to come first. It will cut out a huge chunk of our carbon emissions, help families struggling with their energy bills and end fuel poverty.”
Watch: Who is 'Insulate Britain'?
Ben, 36, a geologist from Somerset, urged more people to join the action.
He said: “There is widespread agreement that insulating our homes is urgent and necessary and that Government plans are inadequate.
“The only question remaining is: will you join us on the motorway to demand action now?”
A Kent Police spokesperson said: “Officers arrived at the scene within minutes and by 8.30am traffic was flowing in both directions.
“Each of the individuals was arrested on suspicion of obstructing a highway and conspiracy to commit public nuisance. They remain in custody as enquiries continue.”
Motorists are still advised to expect delays and to use alternative routes where possible.
Speaking from the road in Dartford this morning, one protester told the Guardian: “Police arrived very quickly, arresting us.
“It would have been good if we’d had a little longer but we’re here and we’re doing it. We’re still making the same statement whether it’s for a long period or short.”
The Met is on scene at an Insulate Britain protest blocking the A40 junction with Gypsy Lane in North Acton. 17 activists have been arrested, six of whom have locked themselves to the ground in order to frustrate our response. Specialist units are on scene to unglue them.
— Metropolitan Police Events (@MetPoliceEvents) October 27, 2021
Met Police said officers are on the scene at the protest blocking the A40 junction with Gypsy Lane in North Acton.
A spokesperson added: “Seventeen activists have been arrested, six of whom have locked themselves to the ground in order to frustrate our response. Specialist units are on scene to unglue them.”