M4 : Westbound : J38 Margam to J44 Lon Las

M4 : Westbound : J38 Margam to J44 Lon Las : Congestion : Delays possible :

Type of event: Incidents

Severity of disruption: Moderate

Start Date: 21/08/2026

End Date: 21/08/2026

First Published

21/08/2026 14:30

Reference Number

RNMDA_2026131339

Last Updated

21/08/2026 14:30

Source Agency

Welsh Government

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