M4 : Westbound : J24 Coldra to J28 Tredegar Park

M4 : Westbound : J24 Coldra to J28 Tredegar Park : Maintenance work : Brynglas Tunnel Closed : Diversion : 07/09/26-09/09/26 2000-0600 :

Type of event: Roadworks

Severity of disruption: Road closure

Start Date: 07/09/2026

End Date: 09/09/2026

First Published

04/09/2026 15:44

Reference Number

RNMDA_2026131618

Last Updated

04/09/2026 15:44

Source Agency

Welsh Government

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