Start date : 29/09/25 | End date : 19/01/26
Essential carriageway surfacing repairs and structural maintenance work.
The scope of works includes :
- Replacement of the bridge deck waterproofing.
- Resurfacing of the bridge deck.
- Replacement of the existing expansion joints.
- Replacement of the Densotape to the parapets.
- Replacement of the sealant to the edge beams at the joint locations.
- Cleaning of all structural elements.
- Concrete testing.
To facilitate these activities there will be :
- Closure on M4 J32 WB On-Slip ‘night time only’.
- Various Lane Closures on Coryton Gyratory ‘Night Time Only’.
- Footway Closure 24 Hours
Footway Closure
Coryton South footbridge – Closed between 29th September and 6th December 2025. Local diversions in place.
Coryton North footbridge - closed between 3rd November and 5th December 2025. Local diversions in place.
Please note that these dates are provisional and may be subject to change depending on weather conditions.
Please note - To support the diversion route currently in place and assist local residents and commuters, bus travel will be free between Tongwynlais and the Village Hotel, Coryton via the Number 132 bus service.
This service will begin on 3rd November 2025 and run throughout the maintenance works period at Coryton North Footbridge.
We appreciate your patience and understanding while these essential works are carried out.
Various Lane Closures on Coryton Gyratory Night Time Only.
13/10/2025 (20:00) - 20/12/2025 (06:00)
05/01/2026 (20:00) - 16/01/2026 (06:00)
The M4 J32 Westbound On-Slip night-time closures
15/10/2025 (20:00) - 18/10/2025 (06:00)
31/10/2025 (20:00) - 01/11/2025 (06:00)
03/11/2025 (20:00) - 05/11/2025 (06:00)
26/11/2025 (20:00) - 27/11/2025 (06:00)
05/12/2025 (20:00) - 06/12/2025 (06:00)
08/12/2025 (20:00) - 12/12/2025 (06:00)
Coryton Northwest & Southwest Footbridges
Please follow the diversion route from Longwood Dr, Cardiff CF14 7HY to A4054, Cardiff CF15 and vice versa.
The M4 J32 Westbound On-Slip night-time closures
Footpath diversion route
Please follow the diversion route from Longwood Dr, Cardiff CF14 7HY to A4054, Cardiff CF15 and vice versa. See attached plan
Please note- To support the diversion route currently in place and assist local residents and commuters, a free temporary bus service (Number 132) will operate between Tongwynlais and the Village Hotel, Coryton.
This service will begin on 3rd November 2025 and run throughout the maintenance works period at Coryton North Footbridge.