Live incidentLane closureNational Highways
M4 westbound lane closure at J20, live incident, started Mon 5 Oct, 18:41
- Road
- M4
- Direction
- Westbound
- Junctions
- J20
- Started
- Mon 5 Oct, 18:41
- Category
- Incident
M4 westbound congestion from J32 Coryton to J33 Capel Llanilltern, 5 Oct 2026
Cleared
This incident on the M4 has cleared. It started at 12:35 on Mon 5 Oct and cleared at 13:35 on Mon 5 Oct.
Last updated by Traffic Wales at 12:35 on Monday 5 October 2026.
Closure details and map
- Status
- Cleared
- Closure type
- Congestion
- Road
- M4
- Direction
- Westbound
- Junctions
- J32 to J33
- Location
- J32 Coryton to J33 Capel Llanilltern
- Started
- 12:35 on Monday 5 October 2026
- Cleared
- 13:35 on Monday 5 October 2026
- Details
- Congestion, delays possible
- Source
- Traffic Wales
- Last updated by the source
- 12:35 on Monday 5 October 2026
Map of the M4 westbound congestion from J32 Coryton to J33 Capel Llanilltern
Use the arrow keys to move the map and the plus and minus keys to zoom.
- Cleared
Other M4 closures and crash records
14 other closures are in force on the M4 right now, and 44 more are planned in the next 7 days.
The M4 accident statistics from 1979 to 2025 record 29,200 collisions on the road, 724 of them fatal.
- Active roadworksMobile lane closureNational Highways
M4 mobile lane closure in both directions between J18 and J17, active roadworks, started Mon 5 Oct, 20:00
- Road
- M4
- Direction
- Both directions
- Junctions
- J18 to J17
- Started
- Mon 5 Oct, 20:00
- Expected to clear
- Tue 6 Oct, 06:00
- Category
- Road Maintenance
- Active roadworksRoad closureTraffic Wales
M4 road closure in both directions between J25A and J27, active roadworks, started Mon 5 Oct, 20:00
- Road
- M4
- Direction
- Both directions
- Junctions
- J25A to J27
- Area
- J25A Grove Park to J27 High Cross
- Started
- Mon 5 Oct, 20:00
- Expected to clear
- Sat 10 Oct, 06:00
- Category
- Carriageway Maintenance
- Active roadworksLane closureNational Highways
M4 eastbound lane closure between J13 and J12, active roadworks, started Mon 5 Oct, 20:00
- Road
- M4
- Direction
- Eastbound
- Junctions
- J13 to J12
- Started
- Mon 5 Oct, 20:00
- Expected to clear
- Tue 6 Oct, 06:00
- Category
- Road Maintenance
- Active roadworksLane closureNational Highways
M4 eastbound lane closure between J19 and J18, active roadworks, started Mon 5 Oct, 20:00
- Road
- M4
- Direction
- Eastbound
- Junctions
- J19 to J18
- Started
- Mon 5 Oct, 20:00
- Expected to clear
- Tue 6 Oct, 06:00
- Category
- Road Maintenance
- Active roadworksEntry slip road closureTraffic Wales
M4 eastbound entry slip road closure between J24 and J22, active roadworks, started Mon 5 Oct, 20:00
- Road
- M4
- Direction
- Eastbound
- Junctions
- J24 to J22
- Area
- J24 Coldra to J22 Pilning/Prince of Wales Bridge
- Started
- Mon 5 Oct, 20:00
- Expected to clear
- Fri 9 Oct, 06:00
- Category
- Surveys