As the protest proceeds, the Sovereign Elizabeth II Scaffold stays shut for a second day.
Police got reports of individuals from the gathering Stop Oil scaling the extension’s poles at the Dartford Crossing at 03:50 BST on Monday.
Roadways Britain said delays were building and around six miles (10km) of slow traffic.
Stop Oil said the activity was in protest against new government oil and gas licenses.
Essex Police said it attempted to determine what was going on as two individuals were still “at level”.
The 1.7mile (2.8km) span takes traffic southward on the A282, which associates the M25 London Orbital Motorway from Essex to Kent. The Dartford Passage generally conveys traffic northward.
Public Interstates said that all southward traffic was being redirected through the East Drag of the Dartford Passage.
Ch Supt Simon Anslow from Essex Police said: “We comprehend how disappointing this present circumstance is for individuals needing to utilize the scaffold and continue ahead.
“Allow me to guarantee we are giving our best to resolve what is happening rapidly and securely.”
He said it was an “intricate circumstance” because of the level of individuals on the scaffold.
Public Interstates had made an evaluation, and it was “not presently protected to re-open the street”, he said.
Mr Anslow said: “We will move against any individual who endangers life or figures they can egotistically stop others getting to and from work or simply approaching their regular routines.”
The effect was “broad”, he added.
“Our need is to keep individuals safe and keep Essex moving.”
A Stop Oil representative expressed that one pair, Morgan Trowland, was a 39-year-old scaffold configuration engineer from London.
Mr Trowland said: “Our government has sanctioned self-destructive regulations to speed up oil creation – killing human existence and obliterating our current circumstance.
“I can’t challenge this franticness in my work area, planning bridges, so I’m making an immediate move.”
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