M4 Prince of Wales Bridge: Resurfacing Work to Cause Disruptions

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Motorists traveling on the M4 Prince of Wales Bridge between England and Wales are being urged to plan ahead and allow extra travel time as the final phase of resurfacing work begins. National Highways has announced that to complete the essential long-term maintenance, it must finish waterproofing and resurfacing a one-kilometer stretch of the cable stay bridge.

This work will involve a combination of overnight and lane closures, with a temporary contraflow and reduced speed limits to keep two lanes open in each direction.

The resurfacing project will start with overnight closures at the end of April to prepare and set up the contraflow system, which will remain in place until July, weather permitting. The full completion of the work is expected by autumn.

Some overnight closures will be necessary to finish resurfacing the westbound carriageway, including four nights starting Sunday, April 27, with a diversion via the M48 Severn Bridge in place during these closures.

Narrow lanes and a contraflow will be installed under overnight closures to prepare for resurfacing on the eastbound carriageway. Full overnight closures of both eastbound and westbound carriageways are scheduled for Thursday, May 1, and again on Tuesday, May 6, with further closures on the eastbound carriageway on Wednesday, May 7.

A diversion via the M48 Severn Bridge will be active from 6am on May 7, alongside a contraflow system and a 40mph speed limit across the bridge, with HGVs allowed access to both running lanes.

In addition, National Highways plans to introduce a 7.5-tonne weight restriction for heavy goods vehicles on the M48 Severn Bridge starting May 27, expected to last between 12 and 18 months.

This measure follows routine surveys revealing that the main bridge cables have “deteriorated and weakened.” To keep the bridge open to most traffic, it is necessary to reduce the load on these cables by restricting the heaviest vehicles for the time being. More information is available through official channels.