M4 smart motorway project

18 May 2020: The M4 between junctions 6 and 8/9 will be closed over the following weekends:

  • 29 May to 1 June

  • 5-8 June

The closures will start after 8pm on Friday and will be open by 6am the following Monday. Diversion routes will be A308M, A308, A332 and A355. For more inforamtion visit Highways England. Their latest bulletin is available here.


17 April 2020: The M4 between junctions 6 and 8/9 will be closed over the last weekend of April 2020 for bridge work. The closure will be from: 8pm Friday 24 April until 6am Monday 27 April 2020. The diversion route for this weekend will utilise the A308M, A308, A332 and the A355. Further details in the attached bulletin.


1 April 2020: The M4 between junctions 5 and 6 will close in both directions from 8pm Friday 3 April 2020 to 6am on Monday 6 April 2020 to allow for deck beams, for the new Riding Court Road bridge near Junction 5, to be lifted into place (nb. the closure period has been extended by 24 hours beyond the original plan due to the cancellation of major sporting events and the lower levels of traffic at present).


Motorway traffic will be diverted to the A4 and A355 over the weekend and local traffic will be diverted for safety reasons.  Riding Court Road bridge will be closed with no pedestrian or vehicle access. There will be a clearly signed local diversion during the bridge closure. More information is available here and for weekly closure updates here.

An update will be provided if measures put in place to manage the Covid-19 outbreak affect this work from going ahead. Highways England, it’s partners and contractors are following general advice from Government on Covid-19 (which can be found here) and also specific advice regarding construction work on their highways projects. All sites have strict safeguarding measures to prevent the spread of Covid-19 and none of the sites are open to the public. These measures focus on the advice from the Government and in particular the importance of workers staying 2 metres apart so that workers can protect themselves, their colleagues and families from the virus.  The situation is constantly under review and the M4 project will continue to follow and respond to the advice from Government.


27 Jan 2020: Revised date for bridge demolition - now planned for weekend of 21-24 February.


2 December 2019: The Old Slade Lane bridge is planned to be taken down on the weekend of 24-27 January 2020, as part of the M4 Smart Motorway Project.  There will be 24/7 working for the entire weekend and in the weeks before bridge demolition, a temporary haul road will be constructed adjacent to the bridge for construction purposes.  Access to build the haul road will be via Old Slade Lane, but this will be short term.  An explanatory leaflet has been produced by the Highways Authority (link) and further details can be found here.



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