Start date: October 2021 | End date: March 2024
An upgrade and extension scheme to the road’s fibre optic communications network is planned in South and West Wales. Works are currently taking place on the A477, A40, A48 and M4.
For more information on traffic management see details below.
5/11/23 - 24/11/23 (20:00 - 06:00)
Westbound lane 1 and hard shoulder closed between J45 Ynysforgan and J46 Llangyfelach.
19/11/23 - 24/11/23 (20:00 - 06:00)
Full slip road closure at J45 westbound exit (off slip).
12/11/23 - 17/11/23 (20:00 - 06:00)
Full slip road closure at J45 westbound entry (on slip).
15/11/2023 - 08/03/2024 (06:00 - 22:00)
Hardshoulder and lane 1 closure M4 eastbound between J37 to J36 | 24hr Traffic Management - Monday to Friday.
01/12/2023 - 02/12/2023 (20:00 - 06:00)
Full slip road closure at J36 eastbound exit (off slip).
12/01/2024 - 13/01/2024 (20:00 - 06:00)
Full slip road closure at J37 eastbound entry (on slip).
03/12/23 - 21/12/23
Hardshoulder and lane 1 closure M4 westbound between J38 to J40 overnight Sunday to Friday 20:00 to 06:00.
17/12/23 - 20/12/23
Full on-slip road closure at J39 Groes travelling Westbound overnight between 20:00 - 06:00.
08/01/2024 - 14/01/2024
Hardshoulder and lane 1 closure M4 westbound between J38 to J40 overnight Sunday to Friday 20:00 to 06:00.
14/01/2024 - 19/01/2024
Hardshoulder and lane 1 closure M4 eastbound between J38 to J40 overnight Sunday to Friday 20:00 to 06:00.
19/01/2024 - 20/01/2024
Full on-slip road closure at J40 travelling Eastbound overnight between 20:00 - 06:00.
21/01/2024 - 02/02/2024
Hardshoulder and lane 1 closure M4 eastbound and Westbound between J38 to J40 overnight Sunday to Friday 20:00 to 06:00.
J45 westbound exit (off slip)
J45 westbound entry (on slip)
J36 eastbound exit (off slip) closure
J37 eastbound entry (on slip)
For further information, please contact Traffic Wales on 0300 123 1213 or via X (Twitter) @TrafficWalesS and Facebook @TrafficWalesS.