The M25 was partly shut on Thursday morning as Just Stop Oil activists targeted the motorway for a fourth consecutive day.
From 6.30am, protesters again scaled gantries at various locations on the motorway, as they continue to call on the government to halt new oil and gas licences.
At least seven people have been arrested.
As of 9.15am, just one stretch of the M25 was believed to remain shut - where it was closed in both directions between junctions 15 and 16.
National Highways warned drivers to expect “long residual delays” from earlier closures caused by protests elsewhere on the motorway.
