National Highways is advising drivers using the M4 Prince of Wales Bridge between England and Wales to plan their journeys this week as essential work continues with overnight closures.

The work to waterproof and resurface 1km of the cable stay bridge is being carried out in phases using a mixture of overnight and lane closures, and there is a temporary contraflow and reduced speed limit on the bridge to keep two lanes open in each direction.

Closure information

Tuesday 3 to Saturday 7 September: the M4 westbound between junctions 21 and 23 will be closed from 8:30pm to 6am each night for resurfacing and to move the contraflow. The road will reopen on Sunday 8 September at 6am.

Tuesday 3 to Friday 6 September: the M4 eastbound between junctions 23 and 21 will be closed from 8:30pm to 6am each night for resurfacing. The road will reopen on Saturday 7 September at 6am.

Tuesday 3 September: the M49 northbound will be closed from 8:30pm to 6am to help keep local roads moving during the closures.

Once this phase of the work is completed there will still be one lane of westbound traffic (towards Wales) using the eastbound carriageway, but the lane used by traffic on the westbound carriageway will change.

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