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M4 : Westbound : J46 Llangyfelach to J47 Penllergaer

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M4 : Westbound : J46 Llangyfelach to J47 Penllergaer : Carriageway maintenance : Road closed : Diversions in place : 20/08/26-21/08/26 2000-0600 :
Type of event: Roadworks
Severity of disruption: Road closure
Start Date: 20/08/2026
End Date: 21/08/2026

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First Published
14/08/2026 10:33
Reference Number
RNMDA_2026131184
Last Updated
14/08/2026 10:33
Source Agency
Welsh Government
Connect with Traffic Wales