Warning · J28 Tredegar Park to J24 Coldra

M4 eastbound at J28 Tredegar Park to J24 Coldra — brynglas tunnel closed (maintenance work)

Eastbound · J28 Tredegar Park to J24 Coldra · Brynglas Tunnel Closed

From 9 Sep, 20:00
04/09/2026 15:45 · Liberty Lux Travel Cymru

Road M4

Direction Eastbound

Place J28 Tredegar Park to J24 Coldra

Works Maintenance work

Impact Brynglas Tunnel Closed

Severity Road closure

Starts 09/09/2026 20:00

Ends 11/09/2026 6:00

Source: Welsh Government · Traffic Wales