M4 : Westbound : J38 Margam

M4 : Westbound : J38 Margam : 04/08/26-05/08/26 1900-0100 : Cyclic maintenance : Closed : Diversions in place :

Type of event: Roadworks

Severity of disruption: Road closure

Start Date: 04/08/2026

End Date: 05/08/2026

First Published

02/08/2026 18:01

Reference Number

RNMDA_2026130958

Last Updated

02/08/2026 18:01

Source Agency

Welsh Government

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