https://highwaysengland.co.uk/projects/m4-junctions-3-12-smart-motorway/
We are making steady progress on the western section between junctions 8 and 9 to junction 12. We expect to finish most of the work on this section by the latter part of 2020, before opening it as a smart motorway during 2021. The eastern section is more complex and will open in 2022.
What's next?
24-27 April 2020 - full weekend closure between junctions 6 and 8/9
The M4 will be closed overnight in both directions between junctions 6 (Slough-Windsor) and 8/9 (Maidenhead) from the evening of Friday 24 to the morning of Monday 27 April 2020. The diversion route for motorway traffic during this weekend will use the A308M, A308, A332 and the A355.
1-4 May 2020 - full weekend closure between junctions 5 and 6
The M4 will be closed overnight in both directions between junctions 5 (Langley) and 6 (Slough-Windsor) from the evening of Friday 1 May 2020 to the morning of Monday 4 May 2020. The diversion route for motorway traffic during this weekend will use the A4 and the A355.
Our April newsletter gives more information about full weekend closures of the M4 throughout this year. There will be further updates on this page.
Please remember that closures can change. For the most up to date information (including timings) check the Planned Roadworks feed. You can view on the Roadworks search page for more search options, or check our regional Twitter feed.
Timeline
Date | Event |
---|---|
March 2008 | Advanced motorway signalling and traffic management feasibility study identified this motorway link as a priority for additional capacity |
2009 | Department for Transport announces a programme of smart motorways, including this scheme |
2010 | Scheme development commenced |
2013 | Roads Minister announces funding for this scheme |
November 2014 to December 2015 | Pre-application consultation |
January to February 2015 | Speed limit consultation |
30 March 2015 | Development Consent Order submitted |
27 April 2015 | Planning application accepted for examination |
July 2015 | CH2M and Arcadis appointed to develop detailed scheme design |
July 2015 | Balfour Beatty Vinci Joint Venture appointed to develop construction methodology and programme |
2 September 2016 | Secretary of State decision |
15 October 2016 | High Court Challenge period ended |
March 2017 | Start of preparation works |
July 2018 | Public information exhibitions |
July 2018 | Start of main works |
15 July 2019 to 14 August 2019 | Statutory Instrument Consultation |
Spring 2022 | Smart Motorway complete and operating |