M4 : Westbound : J37 Pyle to J39 Groes :

M4 : Westbound : J37 Pyle to J39 Groes : 14/12/25-19/12/25 2000-0600 : Maintenance work : Closed : Diversions in place :

Type of event: Roadworks

Severity of disruption: Road closure

Start Date: 14/12/2025

End Date: 19/12/2025

First Published

13/12/2025 12:17

Reference Number

RNMDA_2025126053

Last Updated

13/12/2025 12:17

Source Agency

Welsh Government

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