A12 junction 25 Marks Tey to junction 26 Stanway - concrete roads reconstruction

We're rebuilding the A12 between junction 25 at Marks Tey and junction 26 at Stanway. This will improve the safety, create a smoother quieter journey, and extend the life of the road to make it fit for the future.

Start date 17 October 2022
End date Summer 2024
Cost £36.9m

Latest updates

  • 18 June 2024

    Road closure dates, 21 June to 2 September 2024

    The weekend closures and works on the A12 are progressing well, ensuring improvements for all users.

    Following our works this weekend, junction 25 southbound exit slip road will be closing for around four weeks while we upgrade the road surface within the carriageway. Southbound traffic will be diverted via junction 24.

    Full details of our latest planned road closures are below:

    Dates of closure

    Closure details

    Diversion Route

     

    21 - 24 June 2024

     

     

    Between 8pm on Friday evening and 6am on Monday morning

    We will be doing weekend work in hard-to-reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past junction 25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction 25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    24 June - 19 July 2024

     

    Full closure (24/7) of the southbound exit slip road at junction 25 Marks Tey for approx. four weeks while we reconstruct the surface within the slip road carriageway.

    Traffic will continue along the A12 southbound to junction 24 and re-join the A12 northbound via the Junction 24 northbound entry slip road.

    19 - 22 July 2024

    26 - 29 July 2024

    09 - 12 August 2024

    16 - 19 August 2024

     

     

    Between 8pm each Friday evening and 6am each Monday morning

    We will be undertaking some work in hard-to -reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

     

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past Junction 25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction 25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    30 August - 2 Sept

     

    Between 8pm on 30 August and 6am on 2 September 2024

    Full closure of the A12 carriageway between junction 25 southbound exit slip road, and junction 25 entry slip road.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

    All A12 southbound traffic will be diverted up and over junction 25, exiting the southbound carriageway via the southbound exit slip road, and re-joining the A12 southbound the other side of the junction via the junction 25 southbound entry slip road.

    Diversion map for Junction 25 closure starting 24 June for 4 weeks.

     

  • 23 May 2024

    Updated progress and road closure dates, 31 May to 2 Sep 2024

    Progress Update

    We're pleased to announce that our work on the Junction 26 slip road is nearing completion. While we initially hoped to reopen it this weekend, it will now open on 3 June. This will help minimise traffic congestion while we carry out our other planned works this weekend.

    The diversion route will remain unchanged and will be closely monitored by our traffic management team.

    We understand this delay may cause inconvenience, and we sincerely appreciate your continued patience and support throughout this project. We'll keep you updated on any further developments and thank you again for your cooperation.

    The latest of our planned work is shown below:

    Dates of closure

    Closure details

    Diversion Route

     

     

     

    Ongoing until 3 June 2024

     

     

     

    Full closure (24/7) of the A12 southbound entry slip road at junction 26 Stanway

    Traffic will join the A12 northbound at Junction 26 Stanway and travel to junction 27 and re-join the A12 southbound at junction 27 entry slip road.

    31 May - 3 June 2024

    07 - 10 June 2024

    21 - 24 June 2024

     

     

    Between 8pm each Friday evening and 6am each Monday morning

    We will be doing weekend work in hard-to-reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

     

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past junction 25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction 25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    24 June - 19 July 2024

    Full closure (24/7) of the southbound exit slip road at junction 25 Marks Tey for approx. four weeks while we reconstruct the surface within the slip road carriageway.

    Traffic will continue along the A12 southbound to junction 24 and re-join the A12 northbound via the Junction 24 northbound entry slip road.

    19 - 22 July 2024

    26 - 29 July 2024

    09 - 12 August 2024

    16 - 19 August 2024

     

     

    Between 8pm each Friday evening and 6am each Monday morning

    We will be undertaking some work in hard-to -reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

     

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past Junction 25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction 25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    30 August - 2 Sept

     

    Between 8pm on 30 August and 6am on 2 September 2024

    Full closure of the A12 carriageway between junction 25 southbound exit slip road, and junction 25 entry slip road.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

    All A12 southbound traffic will be diverted up and over junction 25, exiting the southbound carriageway via the southbound exit slip road, and re-joining the A12 southbound the other side of the junction via the junction 25 southbound entry slip road.

    We thank all customers and local residents for their patience while we carry out this important work.

  • 15 May 2024

    Updated road closure dates, 17 May to 19 July 2024

    Due to resources being diverted to the M25 closure at short notice, our weekend work which was due to take place last weekend (10-13 May) around junction 25 of the A12 southbound, had to be rescheduled. We apologise for any inconvenience caused.

    We will now be progressing with our weekend work, and the latest list of our upcoming road closures is shown below:

    Dates of closure

    Closure details

    Diversion Route

     

     

     

    Ongoing until 24 May 2024

     

     

     

    Full closure (24/7) of the A12 southbound entry slip road at junction 26 Stanway

    Traffic will join the A12 northbound at J26 Stanway and travel to junction 27, and re-join the A12 southbound at junction 27 entry slip road.

    17 to 20 May 2024

     

    Between 8pm on Friday evening and 6am on Monday morning

    We will be doing weekend work in hard-to-reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey on Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

     

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past junction 25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction 25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    23 May 2024

    between 8pm and 6am

    Full closure of the A12 southbound carriageway between Junction 26 Stanway and J25 Marks Tey

    Please note: As part of this closure, the southbound entry slip road at Junction 27 will also be closed for safety. This is due to the Junction 27 slip road joining the A12 carriageway at the same point traffic merges for the diversion between junction 26 and 25.

    Traffic will exit at J26 Stanway and travel long the A1124, London Road and re-join the A12 at Junction 25 Marks Tey entry slip road

    31 May to 3 June 2024

    07 to 10 June 2024

    21 to 24 June 2024

     

     

    Between 8pm each Friday evening and 6am each Monday morning

    We will be doing weekend work in hard-to-reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

     

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past junction 25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction 25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    24 June to 19 July 2024

     

    Full closure (24/7) of the southbound exit slip road at junction 25 Marks Tey for approx. four weeks while we reconstruct the surface within the slip road carriageway.

    Traffic will continue along the A12 southbound to junction 24and re-join the A12 northbound via the J24 northbound entry slip road.

    19 to 22 July 2024

    26 to 29 July 2024

    09 to 12 August 2024

    16 to 19 August 2024

     

     

    Between 8pm each Friday evening and 6am each Monday morning

    We will be undertaking some work in hard-to -reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at J26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past Junction 25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction 25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    30 August to 2 Sept

     

    Between 8pm on 30 August and 6am on 2 September 2024

    Full closure of the A12 carriageway between junction 25 southbound exit slip road, and junction 25 entry slip road.

    Please note: the A12 will be closed southbound between junction 26 Stanway and junction 25 Marks Tey each Friday and Sunday evening to allow for the lane closure for the weekend works to be safely installed and uninstalled. During this time, traffic will be diverted to exit at Junction 26 Stanway and travel long the A1124, B1408 (London Road) and re-join the A12 at Junction 25 Marks Tey southbound entry slip road.

    All A12 southbound traffic will be diverted up and over junction 25, exiting the southbound carriageway via the southbound exit slip road, and re-joining the A12 southbound the other side of the junction via the junction 25 southbound entry slip road.

    The dates listed above will be subject to factors including weather and work progress.

     

  • 10 May 2024

    Upcoming weekend closures, 10 May to August 2024

    What have we done so far?

    As we move into the final few months of the scheme, we’ve now rebuilt the old concrete road surface on the northbound carriageway, and also lanes 2 and 3 of the southbound carriageway. These rebuilt sections of road currently have a temporary road surface until final resurfacing is completed at the end of the project. We apply the final road surface at final stage to ensure it isn’t damaged during the construction work. This also maximises the life of the road surface and ensures a better quality of finish. In the meantime, you might experience some unevenness or bumps on the temporary surface.

    We’ve recycled the old concrete road surface by reusing the old material (including cement) to make the foundations for the new stretches of road. We’ve also installed new kerbs, drainage and safety barriers.

    We’ve also recently started rebuilding the southbound entry slip road at junction 26, Stanway. The slip road is currently closed continually (24/7) for approximately four weeks while we work at this location.

    What’s happening next?

    Following the completion of our recent traffic management switch, we can now begin reconstructing the final sections of the southbound carriageway.

    Ahead of finishing the project in the summer, there are some key activities we’ll be doing during the last phase of work:

    • Rebuilding the final lane of the southbound carriageway between junction 26 at Stanway and junction 25 at Marks Tey
    • Completing work in hard-to-reach areas (these are areas that fall outside, or on the edge of our traffic barriers and safe working areas, meaning it is not safe for our work force or the travelling public for us to work on these sections without closing lanes or making changes to the road layout)
    • Rebuilding the southbound exit slip road at junction 25, Marks Tey
    • Final resurfacing of both the northbound and southbound carriageways.

    Once complete, our project will extend the life of the road, improve safety, and create smoother, quieter journeys.

    How will we do this?

    Although a lot of our remaining work will be done within our coned-off sections and safe working areas, we will need some weekend lane closures and diversions over the coming months to let us safely complete work in the hard-to-reach areas around junction 25, and on the southbound exit slip road.

    During most of this upcoming weekend work, the A12 will remain open to traffic but there may be some changes to the road layout around junction 25. While this work has been carefully planned and sequenced to minimise disruption and reduce the impact on the local road network, there may be some diversions and additional congestion in the area, so please allow more time for your journeys.

    At the end of our weekend work later this summer, we’ll need one full weekend road closure between the junction 25 southbound exit slip road and junction 25 southbound entry slip road while we work on the road underneath the Marks Tey junction.

    To minimise disruption, we’ve grouped together all the remaining work which will need road closures. These will all be done in one single weekend towards the end of this project. While we understand closures can be disruptive, we’re planning to make these changes as quickly as possible, and with the least possible disruption.

    When is this work happening?

    A list of our upcoming work is listed in the table below:

    Dates of closure

    Closure details

    Diversion Route

    Ongoing until no later than 24 May

    Full closure (24/7) of the A12 southbound entry slip road at junction 26 Stanway

    Traffic will join the A12 northbound at J26 Stanway and travel to junction 27, and re-join the A12 southbound at junction 27 entry slip road.

     

    10-13 May

    17 - 20 May

    31 May - 3 June

    07 - 10 June

    21 - 24 June

    Between 8pm each Friday evening and 6am each Monday morning

    We’ll be doing weekend work in hard-to-reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past junction 25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction 25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    24 June - 19 July

    Full closure (24/7) of the southbound exit slip road at junction 25 Marks Tey for approx. four weeks while we reconstruct the surface within the slip road carriageway.

    Traffic will continue along the A12 southbound to junction 24and re-join the A12 northbound via the J24 northbound entry slip road.

    19 - 22 July

    26 - 29 July

    09 - 12 August

    Between 8pm each Friday evening and 6am each Monday morning

    We’ll be undertaking some work in hard-to -reach areas on the A12 southbound carriageway.

    During this time, the A12 southbound will remain open to traffic but with some changes to the road layout around junction 25 Marks Tey.

    The southbound contraflow lane will remain open as normal. We advise motorists wanting to continue on the A12 southbound past J25 Marks Tey to use this lane.

    Traffic travelling in the inside lane will be diverted off of the A12 at junction25 southbound exit slip road. Customers in this lane that wish to continue travelling southbound along the A12, will be diverted up and over the junction, rejoining the A12 via the junction 25 southbound entry slip road.

    16 - 19 August

    Between 8pm on 16 August and 6am on 19 August

    Full closure of the A12 carriageway between junction 25 southbound exit slip road, and junction 25 entry slip road.

    All A12 southbound traffic will be diverted up and over junction 25, exiting the southbound carriageway via the southbound exit slip road, and re-joining the A12 southbound the other side of the junction via the junction 25 southbound entry slip road.

    The map below shows the changes to the road layout during upcoming weekend works around junction 25. Please note:

    • A12 southbound contraflow lane will remain open as usual.
    • Customers in the inside lane that wish to continue travelling southbound along the A12, will be diverted up and over junction 25 Marks Tey, rejoining the A12 via the junction 25 southbound entry slip road.

    A12 J25 Marks Tey

    During our closures, we urge customers to:

    • plan ahead
    • avoid unnecessary travel
    • follow the diversion routes and signage in place and not sat navs
    • allow more time for your journey when travelling in the area

    We always aim to work to programme, however unforeseen circumstances or adverse weather conditions may mean changes.

    We thank all customers and local residents for their patience while we carry out this important work.

    Keep in touch

    If you have any questions about this work, you can contact us by calling our 24/7 Customer Contact Centre on 0300 123 5000, or by emailing info@nationalhighways.co.uk.

    You can also keep up to date on road closures by visiting our Traffic England website at www.trafficengland.com or by following our X feed: @HighwaysEAST.

  • 07 May 2024

    Urgent southbound closure for surfacing and barrier work

    Ahead of our weekend work around junction 25 starting this weekend (10 May), we need to put an urgent closure in place this week to replace some of the road surface and move the barrier within the southbound carriageway.

    To do this work safely, we need to close the A12 southbound between junction 26 Stanway and junction 25 Marks Tey for two nights starting from tomorrow (8 May).

    Date of closure

    Closure details

    Diversion route

     

    Wednesday 8 May and Thursday 9 May for 2 nights between 9pm and 5am

    Closure of A12 southbound between J26 Stanway and J25 Marks Tey

    Traffic will exit at Junction 26 Stanway and travel long the A1124, London Road and re-join the A12 at Junction 25 Marks Tey entry slip road

  • 02 April 2024

    April road closures

    Following our work on the northbound carriageway, we've been focused on the southbound section. This has included excavating lanes 2 and 3 of the southbound carriageway, starting at junction 26 and making our way south towards junction 25.

    What's happening next?

    To progress the project, we’ll be having a series of overnight closures on the A12 southbound between junction 26 and junction 25 while we make changes to our roadworks.

    After that, we will begin to upgrade the slip roads, starting with a temporary full closure of the southbound entry slip road at junction 26, which will be closed from 20 April for approximately four weeks, allowing us to work safely in this area. 

    When is this work happening?

    The A12 will be closed southbound overnight between junction 26 Stanway and junction 25 Marks Tey from 8pm until 6am each night on the dates listed in the table below:

    Dates of closure

    Closure details

    Diversion Route

    Monday 15 April to Friday 19 April 2024

     

    Full closure of the A12 southbound carriageway between J26 Stanway and J25 Marks Tey

    Traffic will exit at J26 Stanway and travel long the A1124, London Road and re-join the A12 at J25 Marks Tey entry slip road

    Sunday 21 April to Friday 26 April 2024

     

    Full closure of the A12 southbound carriageway between J26 Stanway and J25 Marks Tey

    Traffic will exit at J26 Stanway and travel long the A1124, London Road and re-join the A12 at J25 Marks Tey entry slip road

    Saturday 20 April to Saturday 18 May 2024

    Full closure of the A12 southbound entry slip road at J26 Stanway

    Traffic will join the A12 northbound at J26 Stanway and travel to J27, and re-join the A12 southbound at J27 entry slip road

    Please note, dates are weather dependent and subject to change if we’re unable to work in poor conditions.

    Whilst we understand closures can be disruptive, we will be looking to make these changes as quickly as possible and with the least possible disruption. However, during this period, please allow more time for your journey when travelling in the area.

    During these closures, a clearly signed diversion route will be in place.

    Traffic will exit at Junction 26 Stanway and travel along the A1124, London Road, and then re-join the A12 at Junction 25 Marks Tey entry slip road. See map below.

    Progress to date

    We have recycled the old concrete road surface by reusing the material (with cement) to form the new foundations we’re installing. We’ve also installed new kerbs and drains.

    Once we have reconstructed the southbound carriageway, we’ll then begin applying the finished surface layer to both the northbound and southbound carriageways. We apply the final layer at this stage to ensure it isn’t damaged during the construction phase. This also maximises the life of the road surface and ensures a better quality of finish.

    Once complete, this important work will extend the life of the road, improve safety, and create smoother, quieter journeys.

    We’d like to thank all customers and local residents for their patience whilst we carry out this important work.

  • 09 February 2024

    February road closures

    We’ll be closing the southbound A12 carriageway between junctions 26 and 25 to carry out work in order to change the traffic management layout to allow us to access different parts of the project.

    The road will close overnight from 8pm until 6am on the following dates:

    Date of closure

    Closure details

    Diversion Route

    Wednesday 14 February

    Thursday 15 February

    Friday 16 February

     

    Full closure of the A12 southbound carriageway between Junction 26 Stanway and Junction 25 at  Marks Tey

    Traffic will exit at Junction 26 Stanway and travel long the A1124, London Road and re-join the A12 at Junction 25 Marks Tey entry slip road

    During the closures, clearly signed diversion routes will be in place.

  • 31 January 2024

    Emergency road closure due to incident

    Due to a vehicle incident today, we’ve had to close the southbound carriageway at junction 26 on the A12 on 31 January to carry out emergency repairs.

    This closure will be in place until 5am on 1 February.  

    Date of closures

    Closure details

    Diversion routes

    Wednesday 31 January to 6am on Thursday 1 February

    Full closure of the A12 southbound carriageway through junction 26 Stanway

    Traffic will leave the A12 via the exit at J26 Stanway and re-join via the junction 26 entry slip road

    Once we’ve completed this repair, we’ll open the carriageway again.

    We’d like to thank all our customers and local residents for their patience whilst we carry out this emergency work.

  • 08 January 2024

    Emergency closure for barrier repair

    Following an incident involving a vehicle hitting our barrier over the weekend, we will need to put an emergency closure in place tonight, so we can carry out repair work.

    In order for us to complete this work and keep members of the public and staff safe, there will be a requirement to close the A12 southbound, between the junction 26 Stanway exit and entry slip roads, between 9pm and 5am tonight.

    Date of closure

    Closure details

    Diversion route

    Monday 8 January

     

    Closure of the A12 southbound between J26 exit and entry slip roads

    Traffic will take the J26 Stanway exit slip road, take the second exit on the roundabout onto the J26 entry slip road, to then re-join the A12 southbound carriageway and continue journey.

    Diversion route

  • 11 December 2023

    Upcoming closures and diversions - December 2023

    Our planned construction activity will stop from Thursday 21 December, with work beginning again on Wednesday 3 January 2024. This is so that we don't cause disruption to motorists travelling over the festive period.

    We’ll still have workers on site to carry out any emergency repairs or maintenance work and our recovery team will be on hand to provide assistance, should anyone breakdown within the work area.

    Before our construction site shuts down over the festive season, we will need some road closures to refresh road markings, install cat’s eyes, repair some of the carriageway and remove some barrier.

    In order for us to complete this work and keep members of the public and our workers safe, we need to close the A12 between 9pm and 5am on the following dates:

    Date of closure

    Closure details

    Diversion route

    Thursday 14 December

     

    Closure of the A12 southbound carriageway between J26 Stanway and J25 Marks Tey

    Traffic will exit at J26 Stanway and travel along the A1124, B1408 and re-join the A12 at J25 Marks Tey

    Thursday 14 December

    Closure of the J27 Lexden southbound entry slip road

    Traffic wanting to join the A12 southbound will take Cymbeline Way, B1408 and join the A12 southbound at J25 Marks Tey entry slip

    Monday 18 December

    Closure of the A12 northbound carriageway between J25 Marks Tey and J26 Stanway

    Traffic will exit at J25 Marks Tey and travel along B1408, A1124 and re-join the A12 at J26 Stanway

    Monday 18 December

    Lane closure of the southbound contraflow lane between J26 Stanway and J25 Marks Tey

     

    Lane 1 southbound between J26 Stanway and J25 Marks Tey will remain open

    No planned closures

    Diversion routes

    Diversion route for A12 southbound between J26 and J25 closures

    Diversion route for A12 southbound J27 Lexden entry slip road closures

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    Diversion route A12 northbound between J25 Marks Tey and J26 Stanway closures

  • 09 December 2023

    Change of open for traffic date

    Since starting construction we’ve encountered a number of unexpected challenges which have impacted our timelines. As a result of this, we’ll need to continue our work on the A12 between junction 25 Marks Tey and junction 26 Stanway into summer 2024.

    These challenges include adverse weather conditions, including the wettest March on record, and the discovery of poor ground conditions under the northbound carriageway.

    Before we started construction, we carried out extensive industry standard surveys. Unfortunately, while our surveys were completed to current standards and using the correct methods, they can only give us an indication of the ground condition in the specific areas tested, rather than every inch of the road. This means that it was only when we began digging up the northbound carriageway that we uncovered these issues, and it became clear that additional work was required to strengthen the foundations of the road.

    We know this will be frustrating news and we’re sorry for the inconvenience these delays may cause to your journey. It’s important however that our work is carried out to the highest specification now to minimise long term disruption for road users in the future.

    Please be assured that we’re working hard to complete construction as quickly as possible. By building in additional time to account for these issues and the risk of further impact from anticipated poor weather conditions over the winter, we hope that this update provides transparency so you’re able to plan ahead should our work continue past spring 2024 as previously expected.

    We’d like to thank you for your continued patience while we carry out this important work.

  • 24 November 2023

    Carriageway surface

    Further to our recent notification that the northbound reconstruction is complete, we’d like to confirm that a final asphalt surface will be laid towards the end of the project, to provide a smooth, consistent surface across all lanes northbound and southbound. This will mean that the surface is brand new when all of the traffic management is removed. Until then, traffic will continue to drive on the temporary surface, known as the ‘binder course’, which will eventually form the under layer of the road when the final surfacing is added.

    During this time, road users may notice some bumps or ridges, but rest assured that these will be eliminated once the final surface is laid, and any safety issues such as potholes will continue to be repaired until then.

    Upcoming overnight road closures for barrier installation and signage change

    To finish installing the safety barrier, so we can complete the southbound carriageway work, we’ll need a couple of overnight southbound closures to put this in place.

    To keep our workers safe while they do this, we’ll be closing the A12 southbound between junction 26 Stanway and junction 25 Marks Tey on the following dates:

    Date and time of closure Closure details Diversion route
    Saturday 25 and Sunday 26 November Overnight closure of the A12 southbound between junction 26 Stanway and junction 25 Marks Tey. Traffic travelling along the A12 southbound will exit at junction 26 Stanway and travel along A1124, B1408 and re-join the A12 at junction 25 Marks Tey.
    Friday 8 December Overnight closure of the junction 27 southbound entry slip. Traffic wanting to join the A12 at junction 27 will take Cymbeline Way, B1408 and join the A12 at junction 25 Marks Tey.

    Junction 26 – 25 southbound diversion route

    Junction 27 southbound entry slip diversion route

    We’re sorry for the delays and disruption that our road closures cause to your journey and we encourage drivers to plan ahead and allow extra time when travelling.

    Please note these closures are subject to change at short notice due to unforeseen circumstances and poor weather conditions.

  • 10 November 2023

    Northbound carriageway work now complete

    We’d like to inform you that we have now completed our work on the A12 northbound carriageway between junction 25 and 26.

    Despite the challenges we’ve faced with the wettest March on record and the unexpected ground conditions we found beneath the carriageway, which meant the excavations and installation of the new foundations took longer than expected, we’ve now achieved the milestone of completing the latest phase.

    We have fully excavated the carriageway, removed the concrete foundations and rebuilt the road using the recycled concrete from the old road before adding the final surface. On top of this, we’ve replaced all of the kerbs, road markings and cat’s eyes, as well as upgrading the drainage system and replacing safety barriers.

    We’d like to extend our sincere thanks to all customers, local residents, in particular those living on the diversion route, and businesses for their patience whilst we’ve carried out the northbound carriageway work.

    Emergency lane closure for barrier replacement

    There will be an emergency lane closure of the A12 northbound at junction 25 Marks Tey tonight, to allow for some barrier to be replaced.

    The A12 northbound carriageway will have 1 lane closed overnight from 9pm to 5am:

    Date and time of closure Closure details Diversion route
    Friday 10 November

    Overnight closure of the A12 northbound at junction 25 Marks Tey

    Traffic will exit the A12 at junction 25 travel over the roundabout and on to the junction 25 entry slip to re-join the A12

     

    A12 J25 Northbound Up and Over Diversion Route

    Upcoming closures for barrier installation

    In order to create a safe working space for our staff to begin the reconstruction of the southbound carriageway, we’ll need a number of closures to install the barrier that will separate them from the live traffic.

    We’ll need to close the A12 carriageway overnight. Please see the table below for more information.

    The A12 southbound carriageway will be closed overnight from 9pm to 5am each night:

    Date and time of closure Closure details Diversion route

    Monday 13 and Tuesday 14 November

     

    and

     

    Saturday 18 to Tuesday 21 November
    Full closure of the A12 southbound between J29 Ardleigh Crown Interchange and J25 Marks Tey Traffic will exit at J29 Ardleigh Crown Interchange and travel along A1232, A133, B1408 and re-join the A12 southbound at J25 Marks Tey entry slip

    Monday 13 and Tuesday 14 November

     

    and

     

    Saturday 18 to Tuesday 21 November

    Full closure of the J27 southbound entry slip road Traffic wanting to join the A12 southbound will take Cymbeline Way, B1408 and join the A12 southbound at J25 Marks Tey entry slip

    We are also working collaboratively with the maintenance team and sharing our closures, to minimise the amount of time we have to have to A12 closed.

    More information about their work can be found here: https://nationalhighways.co.uk/our-roads/east/a12-maintenance-works-between-junction-25-and-junction-32/

  • 01 November 2023

    Upcoming overnight road closures

    In order for us to finish the northbound carriageway work, install the new contraflow lanes, so that we can begin work on the A12 southbound and for other maintenance work taking place along the A12, we’ll have the following closures in place between 9pm and 5am each night:

    Date of closures Closure details Diversion routes
    Wednesday 1 to Sunday 5 November Full closure of the A12 northbound carriageway between J25 Marks Tey and J27 Lexden Traffic will exit at J25 Marks Tey and travel along B1408, A133, A1232 and re-join the A12 at J29 Ardleigh Crown Interchange
    Monday 6 November Full closure of the A12 southbound between J29 Ardleigh Crown Interchange and J25 Marks Tey Traffic will exit at J29 Ardleigh Crown Interchange and travel along A1232, A133, B1408 and re-join the A12 southbound at J25 Marks Tey entry slip
    Monday 6 to Wednesday 8 November Full closure of the A12 northbound carriageway between the J25 Marks Tey exit and entry slip roads Traffic will exit the A12 at J25 exit slip, travel over the roundabout and on to the J25 entry slip road to re-join the A12 northbound
    Tuesday 7 to Sunday 12 November Full closure of the A12 southbound carriageway between J26 Stanway and J25 Marks Tey Traffic will exit at J26 Stanway and travel along the A1124, B1408 and re-join the A12 at J25 Marks Tey
    Tuesday 7 to Sunday 12 November Full closure of the J27 southbound entry slip road Traffic wanting to join the A12 southbound will take Cymbeline Way, B1408 and join the A12 southbound at J25 Marks Tey entry slip

    We are utilising our closures to also allow other teams to carry out maintenance work along the A12. More information about their work can be found on the scheme webpage for the A12 maintenance works between junction 25 and junction 32.

    New contraflow layout

    A contraflow is when the road is shut in one direction and traffic is moved over to drive on the opposite side of the road to share the remaining carriageway.

    Once the contraflow has been moved, two lanes will remain open in each direction. Lane 1 and 2 northbound will carry northbound traffic, while southbound traffic will use lane 1 southbound and lane 3 northbound, in contraflow. This new layout will provide our workers with a clear area to allow us to safely complete our work on lanes 2 and 3 of the southbound carriageway.

    We now expect traffic will begin using the southbound contraflow, from Monday 6 November onwards.

    We’d like to thank all our customers and local residents for their patience whilst we carry out this work.

  • 20 October 2023

    Changes to planned October overnight road closures

    Due to the heavy rain we’ve had and are expecting in the area over the coming days, we are having to change the dates for some of our planned road closures that will allow us to begin work on the southbound carriageway.

    Please find the updated closures and diversion information in the table below. The road will be closed between 9pm and 5am on each of the following nights:

    Date of closures

    Closure details

    Diversion routes

    Friday 20, Sunday 22 and Friday 27 October 2023

    and

    Sunday 29 October to Sunday 5 November 2023

    Full closure of the A12 northbound carriageway between J25 Marks Tey and J26 Stanway

    Traffic will exit at J25 Marks Tey and travel along B1408, A1124 and re-join the A12 at J26 Stanway

    Monday 6 November 2023

    Full closure of the A12 southbound between J29 Ardleigh Crown Interchange and J25 Marks Tey

    Traffic will exit at J29 Ardleigh Crown Interchange and travel along A1232, A133, B1408 and re-join the A12 southbound at J25 Marks Tey entry slip

    Saturday 28 October 2023

    and

    Tuesday 7 to Sunday 12 November 2023

    Full closure of the A12 southbound carriageway between J26 Stanway and J25 Marks Tey

    Traffic will exit at J26 Stanway and travel along the A1124, B1408 and re-join the A12 at J25 Marks Tey

    Saturday 28 October 2023

    and

    Tuesday 7 to Sunday 12 November 2023

    Full closure of the J27 southbound entry slip road

    Traffic wanting to join the A12 southbound will take Cymbeline Way, B1408 and join the A12 southbound at J25 Marks Tey entry slip

    New contraflow layout

    A contraflow is when the road is shut in one direction and traffic is moved over to drive on the opposite side of the road to share the remaining carriageway.

    Once the contraflow has been moved, two lanes will remain open in each direction. Lane 1 and 2 northbound will carry northbound traffic, while southbound traffic will use lane 1 southbound and lane 3 northbound, in contraflow. This new layout will provide our workers with a clear area to allow us to safely complete our work on lanes 2 and 3 of the southbound carriageway.

    We now expect traffic will begin using the southbound contraflow, from Saturday 4 November 2023 onwards.

    We’d like to thank all our customers and local residents for their patience whilst we carry out this work.

    Diversion route for overnight closures of A12 northbound between J25 and J26

    Diversion route for overnight closures of A12 northbound between J19 and J26

    Diversion route for overnight closures of A12 southbound between J26 and J25

    Diversion route for overnight closures of A12 southbound between J29 and J25

    We’d like to thank all customers and local residents for their patience whilst we carry out these works.

     

     

  • 25 September 2023

    Weekend closure of the A12 northbound between junction 25 Marks Tey and junction 26 Stanway

    We recently postponed our planned full weekend closure of the northbound A12 between junction 25 Marks Tey and junction 26 Stanway, as there were emergency repairs taking place in the same area.

    This work has been rescheduled and will take place between 9pm Friday 6 to 5am Monday 9 October.

    Please see the table below for more information:

    Date of weekend closure Closure details Diversion route
    9pm Friday 6 to 5am Monday 9 October Full closure of the A12 northbound carriageway between J25 Marks Tey and J26 Stanway Traffic will exit at J25 Marks Tey and travel along B1408, A1124 and re-join the A12 at J26 Stanway

     

    We can only do these works when the northbound carriageway is completely closed. This is due to the location and the time it takes for the new foundations and road surface to dry.

    Please note this closure is subject to change at short notice due to unforeseen circumstances and poor weather conditions. The southbound carriageway will remain open throughout this period.

    Customers should plan ahead and allow extra time when travelling and avoid the area if possible, as we expect severe delays. Please check the scheme webpage for the latest information before you travel. We’re sorry for the disruption this may cause to your journey.

    Diversion route for overnight closures of A12 northbound between J25 and J26

    We’d like to thank all customers and local residents for their patience whilst we carry out these works.

  • 20 September 2023

    Overnight closures

    So we can excavate concrete, lay new road foundations, replace safety barriers, carry out surveys and resurface the carriageway, we’ll be closing the A12 between junctions 25 and 27 overnight from 9pm until 5am on the dates listed below.

    Date of closure  Closure details Diversion Route
    Monday 25 September and Friday 29 & Saturday 30 September Full closure of the A12 southbound carriageway between J26 Stanway and J25 Marks Tey  Traffic will exit at J26 Stanway and travel long the A1124, London Road and re-join the A12 at J25 Marks Tey entry slip
     Monday 25 September and Friday 29 & Saturday 30 September   Full closure of the A12 southbound J27 Lexden entry slip  Traffic wanting to join the A12 southbound will take Cymbeline Way, London Road and join the A12 southbound at J25 Marks Tey entry slip
     Wednesday 27 & Thursday 28 September and Monday 2 to Thursday 5 October  Full closure of the A12 northbound carriageway between J25 Marks Tey and J26 Stanway  Traffic will exit at J25 Marks Tey and travel along London Road, A1124 and re-join the A12 at J26 Stanway
     Friday 29 & Saturday 30 September  Full closure of the A12 northbound carriageway between the J25 exit and entry slip roads  Traffic will exit the A12 at J25 Marks Tey exit slip, travel over the roundabout and on to the J25 entry slip road to re-join the A12 northbound

     

    Diversion route for closure of the A12 southbound between J26 Stanway and J25 Marks Tey


    Diversion route for closure of the A12 southbound J27 Lexden entry slip


    Diversion route for overnight closures of A12 northbound between J25 Marks Tey and J26 Stanway


    Diversion route for closure of the A12 northbound at junction 25 Marks Tey

  • 13 September 2023

    Postponement of A12 northbound weekend closure

    Due to recently identified safety issues with the carriageway on other parts of our road network (affecting the A12 Marks Tey to Stanway scheme and diversion) which require urgent repair, we are postponing the full weekend closure that was planned to take place from Friday 22 to Monday 25 September. As these repairs are safety critical due to road surface deterioration, they have taken priority.

    Urgent carriageway repairs will now take place from 9pm to 5am each night from Saturday 23 to Tuesday 26 September on the A12 northbound between junction 22 and junction 24.

    The planned weekend work will be rescheduled and we’ll update this webpage once the new closure dates are confirmed. We apologise for any inconvenience this change may cause you.

    Public information event

    As we are now well into the construction phase of our project, we’re hosting a public information event to allow customers to learn more about the work we’re completing, our progress so far and upcoming work. This is also a chance to meet members of the project team, who will be happy to answer any questions you may have. 

    As part of our ongoing information sharing with local residents, businesses and stakeholders, we’d like to invite you to attend our public information event that will be taking place at Marks Tey Farmer’s Market on Saturday 30 September, 9am to 1pm, at Mark Tey Parish Hall, Old London Road, Mark Tey, Colchester, CO6 1EJ.

    The hall is adjacent to the interchange of the A12 and A120 and is easily accessible by car, with free parking available on site. The market is just a few minutes’ walk from Marks Tey Railway Station, where bus links to Colchester, Braintree and surrounding villages can also be found.

    This event will be attended by representatives from and working on behalf of National Highways in the project team, who will be available to discuss any queries you may have.

    Overnight closures

    We’ll be closing the A12 carriageway to carryout concrete excavations, lay new road foundations, replace safety barriers, carry out surveys and surface the carriageway overnight from 9pm until 5am on the dates listed below.

    Date of closure

    Closure details

    Diversion Route

    Monday 11 to Friday 15 September

    Full closure of the A12 northbound carriageway between the J25 exit and entry slip roads

    Traffic will exit the A12 at J25 exit slip, travel over the roundabout and on to the J25 entry slip road to re-join the A12 northbound

    Monday 25 to Friday 29 September

    Full closure of the A12 northbound carriageway between J25 Marks Tey and J26 Stanway

    Traffic will exit at J25 Marks Tey and travel along B1408, A1124 and re-join the A12 at J26 Stanway

     

    Other work taking place in the area

    Maintenance work is taking place between junction 25 Marks Tey and junction 29 Ardleigh Crown Interchange, to replace safety barriers and signs. The work will take place between 9pm and 5am on the following nights.

    Monday 18 to Friday 22 September 2023

    Full road closure of the A12 northbound carriageway between J25 Marks Tey and J29 Ardleigh Crown Interchange.

    Diversion

    Traffic will exit at J25 Marks Tey and travel along B1408, A133, A1232 and re-join the A12 northbound at J29 Ardleigh Crown Interchange entry slip.

    Further information about the work can be found on our dedicated maintenance webpage. 

    Please note these closures are subject to change at short notice due to unforeseen circumstances and poor weather conditions. We’re sorry for the disruption this work may cause to your journey and encourage drivers to plan ahead and allow extra time when travelling, as we expect long delays over the weekend closures. Please check the webpages for the latest information before you travel. During these closures, clearly signed diversion routes will be in place.

    We’d like to thank all customers and local residents for their patience whilst we carry out these works.

    Diversion routes

    Diversion route for overnight closures of A12 northbound between J25 Marks Tey and J26 Stanway

    Diversion route for closure of the A12 northbound at junction 25 Marks Tey

    Diversion route for closure of the A12 southbound between J26 Stanway and J25 Marks Tey

    Diversion route for closure of the A12 southbound J27 Lexden entry slip

    Diversion route for closure of the A12 northbound J25 Marks Tey and J29 Ardleigh Crown Interchange

  • 31 May 2023

    May 2023 newsletter

    A12 junction 25 Marks Tey to junction 26 Stanway - May 2023 newsletter

    Today we've published the second edition of our scheme newsletter. In this issue we provide an update on the work we’ve recently completed, what we’re doing next and explain what a “contraflow” is.

    Read our May 2023 newsletter now.

    Overnight road closures

    Over the coming weeks, we’ll be breaking out the old concrete road foundations and surfacing on the A12 northbound carriageway from junction 25 to Turkey Cock Lane.

    Due to the potential for debris landing on the carriageway, this work will be carried out at night to ensure the safety of both our workers and all road users.

    We’re sorry for the disruption that this may cause to your journey and we encourage drivers to plan ahead and allow extra time when travelling. Please note these closures are subject to change at short notice due to unforeseen circumstances and poor weather conditions. Please check this webpage for the latest information before you travel.

    Upcoming overnight closures

    The following sections of the A12 northbound carriageway will be closed overnight from 9pm to 5am on the nights listed below:

    Date of closure Closure details Diversion route

    Wednesday 31 May to Friday 2 June

    and

    Monday 5 June to Friday 9 June

    Full closure of the A12 J25 Marks Tey northbound entry slip road

    Traffic wishing to join the A12 northbound will travel along B1408, A1124 and re-join the A12 at J26 Stanway.

    Full closure of the A12 northbound carriageway between J25 Marks Tey and J26 Stanway

    Traffic will exit at J25 Marks Tey and travel along B1408, A1124 and re-join the A12 at J26 Stanway.

    During these closures, clearly signed diversion routes will be in place. Please see below for more information.

    Diversion route for overnight closure of A12 northbound between J19 and J26

    Diversion route for overnight closure of the A12 J25 northbound entry slip road


    Diversion route for overnight closures of A12 northbound between J25 and J26

Project information

Overview

We'll be reconstructing the A12 between Marks Tey and Stanway (between junctions 25 and 26) with work starting on 17 October 2022. Reconstruction will involve completely removing the concrete road surface and some of the foundations, before rebuilding the road and resurfacing it with asphalt.

The East region has the highest concentration of concrete roads on our road network, including the A14, A12, A120, A11 and M11.

Around half of the old-style concrete roads will either have repairs or will be replaced during the next five years.

We’ll be using innovative new ways of working and new technology to provide a modern road that will last for decades to come. This will also make it easier and quicker for us to carry out repairs in the future.

Find out more about our nationwide Concrete Roads work

Why we need the scheme

The surface of concrete roads that were designed between the 1950s and 1970s have an average life span of 50 years. Their surfaces are now reaching the stage where they will need to be repaired or replaced for safety reasons, and to help them be less noisy and better to drive on.

In late 2020, we made repairs to the A12 road surface between junction 22 and junction 24 in both directions. During early 2021, we resurfaced the A12 southbound main carriageway between junctions 27 to 26 and also repaired the road surface at the slip roads at junction 27. And in late 2021, we completed repairs to the A12 between junctions 15 and 19.

This video explains the process we go through to rebuild concrete roads:

There is more reconstruction, resurfacing and other maintenance work scheduled for 2023 on other stretches of this road. Read about how we're rebuilding and replacing some of the old concrete road surface on the A12

We started our work to reconstruct the road in Autumn 2022, and we expect to finish by late 2023/early 2024, subject to weather conditions.

We are using a ‘contraflow’ system to keep everyone safe and the road open whilst we’re working. A contraflow is when the road is shut in one direction and traffic is then moved over to drive on the other side of the road to share the remaining road space. This provides us with a clear working area, which means we can work more quickly and safely.

By using a contraflow, we’ll be able to keep two lanes of traffic in each direction whilst we do our work. Full road closures are only be needed when we set up and take down our roadworks.

We'll be doing the work in a few phases:

Phase one: will start at junction 25 northbound and head up to junction 26. Our construction workers will be in lanes one and two, with traffic in a contraflow.

Phase two: junction 25 northbound heading up to junction 26. Our construction workers will be in lanes two and three with traffic in a contraflow.

Phase three: junction 26 southbound heading to junction 25. Our construction workers will be in lanes one and two with traffic in a contraflow.

Phase four: junction 26 southbound heading to junction 25. Our construction workers will be in lanes two and three.

Due to the nature of the work, some noise and light disturbance is expected, but we’ll aim to keep this to a minimum. Thank you for your patience whilst we do this important road work. 

When complete, the scheme will:

  • improve safety and provide a smoother rider for road users
  • reduce noise levels
  • create a new modern road with a 40 to 50-year lifespan that’ll be easier and quicker for us to repair in future

We’ve set up a free SMS alerts service to warn road users, via text message, of any incidents that occur within our roadworks on the A12 during peak travel times.

You can sign up for this service by sending your mobile number to: ConcreteRoadsEssex@nationalhighways.co.uk. Please reference the ‘A12 Marks Tey to Stanway SMS service’ in the subject line of your email, so it's clear which scheme updates you'd like to register for.

Please note that you can opt out at any time by contacting us at the same email address.

Read the latest news and progress on our project to rebuild the A12 road in this stretch.

May 2024 newsletter

November 2023 newsletter

September 2023 newsletter

July 2023 newsletter

May 2023 newsletter

January 2023 newsletter

Documents

Traffic information

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

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