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M4 junctions 6 at Slough/Windsor to 12 at Theale, Berkshire: upgrade to smart motorway
Work to improve journeys by converting the M4 into a smart motorway between Junctions 3 at Hayes to Junction 12 at Theale continues this week. 24 hour narrow lanes and a 50mph speed restriction are in place for sections of this stretch of the M4. Carriageway and slip road closures are planned as follows, all fully closed overnight between approximately 10pm and 5am (traffic management will usually be rolled out from 9pm and taken off by 6am).
*** UPDATE FOR THIS WEEKEND: The M4 westbound carriageway between junctions 8/9 (Maidenhead) and 10 (Wokingham) will be closed overnight on Saturday 31st August. Clearly signed diversions will be in place utilising the A404M, A4, A3290 and A329M. ***
Please be advised of three upcoming full weekend closures in both directions of the M4 this Autumn. For more details please read the Summer 2019 newsletter :
Full closures booked for the week commencing Monday 2nd September 2019 are as follows:
There are also slip road closures booked as follows:
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.