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Traffic Wales information line 0300 123 1213
The Welsh Government’s traffic information service for motorways and trunk roads in Wales

M4 Brynglas Tunnels (Eastbound Bore) – Essential Repairs – 26/04/2021 – 14/05/2021

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Where and Why?

Works to carry out an essential repair of Brynglas Tunnels following a vehicular impact. Works will commence Monday 26th April 2021 at 8pm and are programmed to conclude Friday 14th May 2021 at 6am.

Diversions and Safety Measures

Works will be undertaken at night between the hours of 8pm and 6am Monday to Friday only; however, no works will be undertaken on Early May bank holiday (3rd May 2021). The works will be completed utilising total closures of the eastbound carriageway. Signed local diversions will be in place with each closure being notified at least 1 week in advance by signing on site. Dates and times of each total closure provided below. 

Programme of total closures

M4 Eastbound – Brynglas Tunnels

26th April 2021 – 29th April 2021 overnight closures between 8pm – 6am

4th May 2021 – 8th May 2021 overnight closures between 8pm – 6am

10th May 2021 – 14th May 2021 overnight closures between 8pm – 6am

** Please note, programme may be subject to change.

Enquiries

For further information, please contact Traffic Wales on 0300 123 1213 or via Twitter @TrafficWalesS


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