M4
Warning · J24 Coldra to J28 Tredegar Park
M4 westbound at J24 Coldra to J28 Tredegar Park — brynglas tunnel closed (maintenance work)
Westbound · J24 Coldra to J28 Tredegar Park · Brynglas Tunnel Closed
Road M4
Direction Westbound
Place J24 Coldra to J28 Tredegar Park
Works Maintenance work
Impact Brynglas Tunnel Closed
Severity Road closure
Starts 07/09/2026 20:00
Ends 09/09/2026 6:00
Source: Welsh Government · Traffic Wales