M4 : Westbound : J40 Taibach to J46 Llangyfelach

M4 : Westbound : J40 Taibach to J46 Llangyfelach : Congestion :

Type of event: Incidents

Severity of disruption: Moderate

Start Date: 17/07/2026

End Date: 18/07/2026

First Published

17/07/2026 14:34

Reference Number

RNMDA_2026130695

Last Updated

17/07/2026 14:34

Source Agency

Welsh Government

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