M20 Junction 1 improvements

We’re upgrading the central reservation barrier at M20 junction 1 by installing a new barrier system. This will improve safety and make future maintenance easier and more efficient.

Start date 10 January 2025
End date 13 January 2025
Cost TBC

Latest updates

  • 18 December 2024

    M20 weekend closure - January 2025

    We'll close the M20 in both directions between the slip roads at junction 1 from 10pm Friday 10 January to 5.30am Monday 13 January 2025.

    Why must we close the road for a whole weekend?

    The safety barrier is a vital feature of all motorways. A safe, reliable barrier protects road users.

    While we are working, there will be times when there won't be a barrier separating east and westbound carriageways.

    So, for safety reasons we'll close this stretch of road.

    We’ll work continually over a 56-hour period to upgrade the barrier in a single weekend, avoiding longer-term disruption.

    We'll construct the new barrier so it will be easier and faster to replace  damaged parts. This will make maintenance faster in future.

    Diversions

    A short diversion route for east and westbound traffic will be in place via M20 junction 1.

    A20 eastbound traffic
    • exit at M20 junction 1
    • use the northern section of the Swanley Interchange and the M20 entry slip road to continue eastbound
    M20 westbound traffic
    • exit at M20 junction 1
    • use the southern section of the Swanley Interchange and the A20 entry slip road to continue westbound.

    Slip roads between the M20 and M25 and the B2173 London Road will remain open over the weekend. This includes the free-flowing link roads which directly connect the M20 and M25 to the east of the Swanley Interchange.

    Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.

    Check this page for updates.

See more updates

Project information

Overview

We’re upgrading around 350 metres of central reservation barrier at M20 junction 1 where it’s reaching the end of its maintainable life.

The new barrier system will improve safety and make future maintenance easier and more efficient.

Documents

Traffic information

Information about scheduled roadworks and events on our motorways and major roads.

Contact us

info@nationalhighways.co.uk

0300 123 5000

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