M4 Prince of Wales bridge resurfacing

We’re resurfacing a section of the M4 Prince of Wales Bridge to extend the life of the road surface, providing smoother and safer journeys for motorists.

Start date Summer 2024
End date Autumn 2024
Cost TBC

Latest updates

  • 20 June 2024

    Closure information for the M4 Prince of Wales bridge

    Monday 8 & Tuesday 9 July: the westbound carriageway will be closed between 9pm and 5am each night, with a lane also closed on the eastbound carriageway. When the road opens Tuesday 9 July, the westbound carriageway will be reduced to two lanes.

    Wednesday 10 & Thursday 11 July: the eastbound carriageway will be closed between 9pm and 5am each night. When the road opens on Thursday 11 July, the eastbound carriageway will be reduced to two lanes.

    Saturday 20 July: the westbound carriageway will be closed from 9pm to 5am, with one lane only running eastbound.

    During the closures, a diversion will be in place via the M48.

    From 5am Sunday 21 July, there will be a contraflow and a reduced speed limit on the bridge. Two lanes will be open in each direction.

    Signage on both sides of the bridge will provide live travel information for the M4 and M48 to help road users plan their journeys.

    We’ll need some overnight closures as our work progresses to allow us to move the contraflow, ensuring we can carry out work across the full width of the carriageway. Keep an eye on our social media channels and webpage for more details.

    Here's a quick summary of what we're doing

    We’re resurfacing and carrying out concrete repairs on the Prince of Wales Bridge that carries the M4 over the Severn Estuary.

    This work will be carried out using a mixture of overnight and lane closures. There will be a temporary contraflow and reduced speed limit on the bridge to keep two lanes open in each direction.

    M4 Prince of Wales Bridge resurfacing phases

    We’ll start with some overnight closures in July for preparation work and to set up the contraflow. The contraflow will then be in place until our work is finished. This is currently expected to be at the end of autumn, but we’ll be doing everything we can to get the work done as quickly as possible.

    Doing this work in the summer reduces the risk of the M48 bridge being closed due to weather, providing an alternative route for anyone crossing the river.

Project information

Overview

The M4 Prince of Wales Bridge is one of two crossings over the River Severn, providing a vital connection between England and Wales.

We need to re-waterproof and resurface a 1km stretch of the cable stay bridge to extend the life of the road surface.

We aim to maintain as much capacity as possible by keeping 2 lanes running in both directions and offering the M48 Severn bridge as an alternative route. We need to carry out this work during times when the M48 bridge is least likely to be closed due to wind.

  • Extended life of road surface
  • We’re less likely to return in the future to carry out repairs
  • Provides smoother and safer journeys

Documents

Traffic information

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

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