0300 123 1213
Rydym yn croesawu galwadau’n Gymraeg. We welcome calls in Welsh.
Rydym yn croesawu galwadau’n Gymraeg. We welcome calls in Welsh.

M4 : Westbound : J38 Margam to J41 Pentyla/Baglan

  1. Home
  2. Road traffic alerts
  3. M4 : Westbound : J38 Margam to J41 Pentyla/Baglan
M4 : Westbound : J38 Margam to J41 Pentyla/Baglan : 17/11/26-18/11/26 0800-0025 : Cyclic maintenance : Exit slip road closed : Entry slip road closed : Diversions in place :
Type of event: Roadworks
Severity of disruption: Road closure
Start Date: 17/11/2026
End Date: 18/11/2026

Go to our Contact page to contact us about this traffic alert. Please quote the reference number below.

First Published
13/11/2026 17:34
Reference Number
RNMDA_2026133431
Last Updated
13/11/2026 17:34
Source Agency
Welsh Government
Connect with Traffic Wales