Skip to main content
Rydym yn croesawu galwadau’n Gymraeg. We welcome calls in Welsh.
Rydym yn croesawu galwadau’n Gymraeg. We welcome calls in Welsh.

M4 St Julian’s Viaduct: Concrete Testing

Start Date: 07/11/2024 | End Date: 13/12/2024

M4 J25 Night Works

Essential maintenance works to M4 St. Julian's Viaduct between J24 The Coldra and J28 Tredegar Park will commence on November 7 intermittently over 15 nights.

The work will be carried intermittently out over a 15-night period between the hours of 20:00 – 06:00 under a full carriageway closure.

25-30 November and 11-13 December (20:00-06:00)

  • M4 closed overnight eastbound between J24 Coldra and 28 Tredegar Park.

2-7 and 9-11 December (20:00-06:00)

  • M4 closed overnight westbound between J28 Tredegar Park and J24 Coldra. 

For further information, please contact Traffic Wales on 0300 123 1213 or via X or Facebook.