The M4 will be closed on a number of coming dates to continue work on the M4 upgrade.
A document containing a full description of the dates for closures and information about the scope of the project can be found by clicking on the picture alongside.
The following carriageway closures are scheduled this week:
The M4 will be closed In both directions over the weekend of 27 to 29 March 2021 between junctions 5 (Langley) and 6 (Slough-Windsor) for major smart motorway upgrade work. The closure will start after 5.30am Saturday 27 March and the motorway will reopen by 6am on Monday 29 March 2021. Clearly signed diversions will be in place utilising the A355 and the A4.
In the event of poor weather conditions or other issues out of our control, planned work may be postponed at short notice. Contingency bookings are also in place, but these are only used if previously planned work is delayed and there is no clash with other closures. If work completes on an earlier day the motorway may not close, or if work completes ahead of schedule the motorway may reopen early. Signage will be in place on the network to notify of closures and diversions. The project is continuing but all our work is under careful review in response to the COVID-19 outbreak and safety measures are in place on site to protect workers, their families and the public.