Description: M4 : Westbound : J38 (Port Talbot) Margam : Cyclic maintenance : Exit slip road closed : 26/10/26-31/10/26 2000-0600 :, Start time: 26/10/2026 20:00 , End Date: 31/10/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 23/10/2026 15:36
Nearest town: 6.39 miles from Penrhiwtyn.

Description: M4 : Westbound : J39 Groes : Carriageway maintenance : Entry slip road closed : Diversions in place : 26/10/26-31/10/26 2000-0600 :, Start time: 26/10/2026 20:00 , End Date: 31/10/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 23/10/2026 15:38
Nearest town: 5.77 miles from Penrhiwtyn.

Description: M4 : Westbound : J44 (Swansea) Lon Las : Carriageway maintenance : entry slip road closed : Diversions in place : 25/10/26-27/10/26 2000-0700 :, Start time: 25/10/2026 20:00 , End Date: 27/10/2026 7:00, Severity: Road closure, Source: Welsh Government, Last updated: 25/10/2026 20:00
Nearest town: 3.06 miles from Penrhiwtyn.

Description: M4 : Eastbound : J44 (Swansea) Lon Las : Carriageway maintenance : Exit slip road closed : Diversions in place : 25/10/26-27/10/26 2000-0600 :, Start time: 25/10/2026 20:00 , End Date: 27/10/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 25/10/2026 20:00
Nearest town: 3.06 miles from Penrhiwtyn.

Description: M4 : Westbound : J46 (Swansea) Llangyfelach : Carriageway maintenance : Entry slip road closed : Exit slip road closed : Diversions in place : 27/10/26-29/10/26 2000-0600 :, Start time: 27/10/2026 20:00 , End Date: 29/10/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 23/10/2026 15:41
Nearest town: 6.33 miles from Penrhiwtyn.

Description: M4 : Eastbound : J47 (Swansea) Penllergaer : Carriageway maintenance : Entry slip road closed : Diversions in place : 30/10/26-31/10/26 2000-0900 :, Start time: 30/10/2026 20:00 , End Date: 31/10/2026 9:00, Severity: Road closure, Source: Welsh Government, Last updated: 23/10/2026 15:43
Nearest town: 8.08 miles from Penrhiwtyn.
