Insulate Britain has admitted it did not think it would "get away with" protests for as long as it has and vowed to mount fresh roadblocks across the country.
Eco-activists have blocked slip roads and motorway junctions across the country since September, targeting the M25 and causing misery for thousands of drivers trying to get to hospital appointments, work and school.
The group has pledged to continue its demonstrations and is considering new tactics, despite the Government putting injunctions in place and threatening sentences of up to two years in prison.
"What the public needs to understand is that we will keep fighting," Insulate Britain’s Tracey Mallaghan told Sky News. "We work on a week-by-week basis.
"Not one of us thought we’d get away with more than two or three weeks of this. We all, genuinely, were prepared to go to prison."
Thirty-two Insulate Britain protesters are set to face court for breaching the injunctions, with nine of them due to appear at the High Court on Nov 16.
Craig Scudder, a former City broker who campaigns with the group, says it plans to continue blocking roads but is considering new tactics for its next protests, including targeting different parts of the UK.
"It may be that over the coming weeks you see us around the country more," he said. "We’re looking at other tactics. We don’t want to be a one-trick pony. You haven’t seen the end of Insulate Britain."
Mr Scudder compared the group’s efforts to those of people who fought in the war as he urged the British public to "pick a side".
"In the same way that past generations were asked: ‘What did you do in the war?’, I think people are going to be asked what they did in this critical point in history," he added. "If you care about this, then it’s time for you to step up. You need to join us."