M4 : Westbound : J25A Grove Park to J28 Tredegar Park :

M4 : Westbound : J25A Grove Park to J28 Tredegar Park : Maintenance work : Tunnel closed : Diversions in place : 20/05/25-22/05/25 2000-0600 :

Type of event: Roadworks

Severity of disruption: Road closure

Start Date: 20/05/2025

End Date: 22/05/2025

First Published

17/05/2025 08:40

Reference Number

RNMDA_2025120756

Last Updated

20/05/2025 20:00

Source Agency

Welsh Government

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