Police are warning of major disruption to Cambridge city centre as climate activists prepare to begin a week of road blocks.
Extinction Rebellion claims it will stage protests from Sunday February 16 through to Saturday February 22.
They intend to stop all vehicles entering the city centre via Trumpington Road and The Fen Causeway - although pedestrians and cyclists will have access.
Police said they were working with the city council, county council and local transport companies to find way to reduce the disruption but warned road closures and diversions could be put in place.
"We have to strike a balance between the need to allow peaceful protest within the city and the disruption that the protest itself causes.
Extinction Rebellion Cambridge first threatened to bring the city to a halt on New Year's Day when they issued three demands to Cambridgeshire County Council, the city council, and the University of Cambridge.
The University of Cambridge must cut ties with the fossil fuel industry.
Cambridge City Council must hold a Citizens’ Assembly on Climate Justice.
Cambridgeshire County Council must work with other relevant regional authorities to provide a plan for a just transition away from an inadequate transport system reliant on fossil fuels.
The campaign group said if those demands were not met, they would stage the week-long roadblock to "highlight the fact that the most privileged amongst us contribute to an incredibly high level of pollution compared to the least privileged".
They believe the location of the roadblock at the junction of The Fen Causeway and Trumpington Road will "heavily disrupt Cambridge's road network".
"The site will become a base for more disruptive satellite actions to take place all across Cambridge, and the roadblock itself will be a place of peace, learning, and above all a commitment to social and climate justice. The roadblocks will be people-based with some light infrastructure to make the site safer, more permanent, and accommodating to everyone."
Police urged commuters to follow their updates on Twitter and Facebook, and check the force's website - www.cambs.police.uk.