M4 : Eastbound : J28 Tredegar Park to J24 Coldra

M4 : Eastbound : J28 Tredegar Park to J24 Coldra : Maintenance work : Brynglas Tunnel Closed : Diversion : 09/09/26-11/09/26 2000-0600 :

Type of event: Roadworks

Severity of disruption: Road closure

Start Date: 09/09/2026

End Date: 11/09/2026

First Published

04/09/2026 15:45

Reference Number

RNMDA_2026131619

Last Updated

04/09/2026 15:45

Source Agency

Welsh Government

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