News on M4 J3-12 smart motorway

M4 smart motorway work closure update for the week commencing 20 January 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).

FIRST WEEKEND CLOSURE OF 2020 THIS WEEKEND: The M4 between junctions 6 and 8/9 will be closed in both directions from later tonight all weekend until 6am on Monday 20 January 2020. Traffic will be diverted to the A308M, A308, A332 and the A355 (see below). 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 5 (Langley) and 6 (Slough/Windsor) will be closed overnight on Thursday 23 and Friday 24 January 2020. Clearly signed diversions will be in place utilising the A4 and the A355.

The M4 eastbound carriageway between junctions 12 (Theale) and 11 (Reading) will be closed overnight on Friday 24 January 2020. Clearly signed diversions will be in place utilising the A4 and the A33.

There are also slip road closures booked as follows:

Junction 8/9 – the eastbound entry slip will be closed overnight on 20, 21, 22 January.

Junction 10 – the westbound entry slip from the A329M northbound (slip road 2) will be closed overnight on 20 January.

Junction 10 – the westbound entry slip from the A329M southbound (slip road 6) will be closed overnight on 20, 21, 22 and 23 January.

Junction 10 – the eastbound exit slip to the A329M southbound (slip road 7) will be closed overnight on 20 and 21 January.

Junction 10 – the westbound exit slip to the A329M northbound (slip road 8) will be closed overnight on 21 and 22 January.

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 17th January 2020

by M4 J3 to 12 Communications Team