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Traffic Wales information line 0300 123 1213
The Welsh Government's
traffic information service

A48(M) Castleton to St Mellons landscape rehabilitation scheme – November 2018 to February 2019.


Where & Why?

Landscape rehabilitation works on the A48(M) from Junction 29 of the M4 (Castleton) to Junction 29A of the A48(M) (St Mellons) on both the eastbound and westbound carriageways. These works are essential maintenance works.

Diversions & Safety Measures

Works will commence on Monday 26th November 2018.

Traffic management will be in place to protect the workforce and manage the flow of traffic. Every effort will be made to minimise inconvenience to road users.

Day time works will be undertaken utilising hard shoulder closures. Night time works will be undertaken between the hours of 8pm and 6am utilising full road closures. During the full closures, signed local diversions will be in place and advance notification signs will be provided advising the travelling public of the upcoming closures. Please note that the eastbound and westbound carriageways will not be closed at the same time. The works are programmed to be completed by February 2019, weather permitting.


For further information, please contact South Wales Trunk Road Agent (SWTRA) on 0300 123 1213, select 1 for English, then select 2 for road maintenance issues.

SWTRA anticipate updates will be provided as required and when there are notable changes in programme duration. Please check this page for the latest information.

Call the Traffic Wales information line
0300 123 1213
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