The Operation Brock contraflow will be removed overnight on Saturday 3rd September 2022. This means that work on the M20 Moveable Barrier Scheme can restart. The moveable barrier will remain in place on the London-bound M20 between junctions 9 and 8, as a traffic management system.

Overnight closure:

To remove the contraflow system, both the M20 London-bound (between junctions 9 and 8), and the M20 coastbound (between junctions 7 and 9) will be closed from 8pm on Saturday 3rd September until 6am on Sunday 4th September 2022. During this closure, the following clearly signed diversion routes will be in place:

  • Coastbound traffic will be diverted off the M20 at junction 7 to take the A249 northbound to the M2 Junction 5, then continue on the M2 and A2 to Dover.
  • Traffic for Eurotunnel will need to then take the A20 London-bound until it joins the M20 at junction 13. Traffic can then leave the M20 at junction 11 for Eurotunnel.
  • London-bound traffic will be diverted along the A20. Over-height vehicles should use the A2, M2 and A249.

Noisy work:

To keep closures to a minimum, the M20 Moveable Barrier project will use the overnight closure on 3rd September to install a temporary safety barrier along sections of the outside lane on the coastbound carriageway. The barrier is being installed to protect the travelling public and the workforce, whilst work is carried out on drainage improvements. Installing this barrier will be noisier than usual work.

Lane closures:

As work will be restarting on the M20 Moveable Barrier scheme, the following lane closures will again be required between junctions 8 and 9 in both directions:

  • London-bound carriageway: the outside two lanes will be closed using the moveable barrier. The hard shoulder will be in use, so there will be two lanes running London-bound, and a 50-mph speed restriction will be in place.
  • Coastbound carriageway: for safety reasons, whilst work is taking place in the central reservation, the outside lane will be closed using cones. The aim is to only close the section of road where work is taking place. Where the outside lane is closed, there will be a 50-mph speed limit in place.

Apart from occasionally closing the carriageway for traffic management changes, work will be carried out mainly under lane closures only. Wherever possible, advance notice of overnight closure will be given except for any unforeseen circumstances, for example safety critical emergency work.

As ever, dates are subject to change in the case of adverse weather or other unplanned events.
You can check the daily updated National Highways closure report at the link below:

You can also find all the latest information on our Twitter feed, Facebook page, and the traffic information pages of the National Highways website at

General Telephone enquiries to National Highways can be made to Telephone: (0300) 123 5000

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