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

M4 J48 and A4138 Junction Improvement


Start date: April 12th | End date: Spring 2022

J48 Hendy slip road

Works to improve the junction 48 interchange.The majority of works will take place on the junction slip roads and the adjoining A4138 county road.

The completed scheme will provide increased capacity through the junction as well as enhancing the existing pedestrian facilities.The construction works are anticipated to take 9-12 months to complete.

Total closures of the slip roads at junction 48 will be required for short periods as work progresses. The dates of these closures will be signed 7 days in advance. The diversion route for the slip road closures will be to continue to the next junction and return along the opposite carriageway.

Traffic management will be present at the site from the scheme commencement with any road closures to be notified by information signs at the site, 7 days in advance of being implemented. 

Monday 20/09 –East exit closure from 7pm - 6am
Tuesday 21/09- East exit closure from 7pm - 6am
Wednesday 22/09 – west entry slip closure from 7pm - 6am  
Thursday 23/09 – west entry slip closure from 7pm- 6am and west exit slip closure from 8pm- 6am

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

Call the Traffic Wales information line
0300 123 1213
Contact us