M4 westbound junction 12 to 13 resurfacing

We're resurfacing the M4 westbound carriageway between junction 12 Theale and junction 13 Chieveley Interchange near Reading, West Berkshire.

Start date 8 September 2025
End date 10 October 2025
Cost £1.5 million

Latest updates

  • 08 September 2025

    M4 junction 12 to 13 resurfacing - 8 September to 10 October

    Works

    Monday 8 September until Friday 10 October (9pm-6am)

    The M4 will be closed at night westbound between junction 12 (Theale) and junction 13 (Chieveley).

    This is the stretch that connects the M4 at Reading to the A34 junction at Chieveley. We're also closing the entry slip road to the westbound carriageway.

    Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.

  • 15 May 2025

    Resurfacing work starts soon

    We need to resurface M4 eastbound carriageway between junction 13 Chieveley Interchange and junction 12 Theale Interchange, near Reading, West Berkshire.

    We'll work 9pm to 6am on various weekdays between June and September. 

    For safety, we'll need overnight full closures of the eastbound carriageway and some overnight lane closures.

    We'll start with overnight lane closures, 9pm to 6am, on Monday 2 June and Tuesday 3 June.

    The M4 eastbound carriageway will then be closed from Junction 13 to Junction 12, Wednesday 4 June to Wednesday 20 August, 9pm to 6am, Monday to Friday only.

    Traffic will be diverted via A339 and A4, to rejoin the M4 at junction 12. 

    Diversion

    • Exit at M4 junction 13 
    • Continue on the A339
    • Join A4 London Road 
    • Continue onto Bath Road
    • Rejoin the M4 at junction 12

    We'll update this page with further dates/details as work progresses and when the schedule is confirmed.

See more updates

Project information

Overview

This project is essential resurfacing.

The scheme will result in smoother journeys and reduce the need for disruptive, short-term repairs.

Documents

Traffic information

Information about scheduled roadworks and events on our motorways and major roads.

Contact us

info@nationalhighways.co.uk

0300 123 5000

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