M4 J3-12 smart motorway

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M4 smart motorway work closure update for the week commencing 23 March 2020

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 (traffic management will usually be rolled out from 9pm and taken off by 6am).

The Government has announced the results of the smart motorways safety audit. The programme will continue and there is an 18 point plan to improve safety. You can read the full report and a statement from the Secretary of State for Transport here: https://www.gov.uk/government/news/action-plan-announced-to-boost-smart-motorway-safety

Our March newsletter , with a full list of weekend M4 closures for 2020 is out and can be read here .

  • NEXT WEEKEND CLOSURE 3-5 APRIL 2020: The M4 between junctions 5 and 6 will be closed in both directions from approximately 8pm Friday 3 April until 6am on Sunday 5 April 2020 for installation of a new bridge deck. Traffic will be diverted to the A355 and the A4. Strategic diversions will also be in place in the wider region using the M25, M3 and M40.
  • Overnight full closures next week are as follows:

  • The M4 westbound carriageway between junctions 6 (Slough-Windsor) and 8/9 (Maidenhead) will be closed overnight on Monday 23, Tuesday 24, Wednesday 25 & Thursday 26 March 2020. Clearly signed diversions will be in place utilising the A355, A332, A308 and A308M.
  • There are also slip road closures booked as follows:

  • Junction 4 - the eastbound entry slip will be closed overnight on 23 & 24 March.
  • Junction 4b - the westbound exit slip will be closed overnight on 25, 26 & 27 March.
  • Junction 6 - the westbound entry slip will be closed overnight on 23, 24, 25 & 26 March.
  • Junction 7 - the westbound entry slip will be closed overnight on 23, 24, 25 & 26 March.
  • Junction 10 - the westbound entry slip from the A329M northbound (slip road 2) will be closed overnight on 23, 24 & 25 March.
  • Junction 10 ā€“ the eastbound entry slip from the A329M southbound (slip road 4) will be closed overnight on 26 & 27 March.
  • Junction 10 - the westbound entry slip from the A329M southbound (slip road 6) will be closed overnight on 25 March.
  • Junction 10 - the westbound exit slip to the A329M northbound (slip road 8) will be closed overnight on 25 & 27 March.
  • Junction 11 - the eastbound entry slip will be closed overnight on 25 & 26 March.
  • 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.

    Posted on 20th March 2020

    by M4 J3 to 12 Communications Team