Live incidentLane closureNational Highways
M4 eastbound lane closure between J4 and J3, live incident, started Sat 10 Oct, 15:40
- Road
- M4
- Direction
- Eastbound
- Junctions
- J4 to J3
- Started
- Sat 10 Oct, 15:40
- Category
- Incident
M4 westbound lane closure between J11 and J12, 12 Sep 2026
Cleared
This incident on the M4 has cleared. It started at 12:00 on Sat 12 Sep and cleared at 12:17 on Sat 12 Sep.
Last updated by National Highways at 12:17 on Saturday 12 September 2026.
Closure details and map
- Status
- Cleared
- Closure type
- Lane closure
- Category
- Incident
- Road
- M4
- Direction
- Westbound
- Junctions
- J11 to J12
- Location
- M4 westbound between J11 and J12
- Started
- 12:00 on Saturday 12 September 2026
- Cleared
- 12:17 on Saturday 12 September 2026
- Source
- National Highways
- Last updated by the source
- 12:17 on Saturday 12 September 2026
Map of the M4 westbound lane closure between J11 and J12
Use the arrow keys to move the map and the plus and minus keys to zoom.
- Cleared
Other M4 closures and crash records
4 other closures are in force on the M4 right now, and 66 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.
- Live incidentLane closureNational Highways
M4 eastbound lane closure between J20 and J19, live incident, started Sat 10 Oct, 14:38
- Road
- M4
- Direction
- Eastbound
- Junctions
- J20 to J19
- Started
- Sat 10 Oct, 14:38
- Category
- Incident
- Active roadworksExit slip road closureTraffic Wales
M4 eastbound exit slip road closure at J35 Pencoed, active roadworks, started Tue 15 Sep, 19:00
- Road
- M4
- Direction
- Eastbound
- Junctions
- J35
- Area
- J35 Pencoed
- Started
- Tue 15 Sep, 19:00
- Expected to clear
- Tue 13 Oct, 06:00
- Category
- Clearance Work
- Active roadworksHard shoulder closureNational Highways
M4 eastbound hard shoulder closure between J17 and J16, active roadworks, started Tue 27 Apr 2021, 23:59
- Road
- M4
- Direction
- Eastbound
- Junctions
- J17 to J16
- Started
- Tue 27 Apr 2021, 23:59
- Expected to clear
- Fri 30 Jul 2027, 18:00
- Category
- Road Maintenance
- PlannedHard shoulder closureNational Highways
M4 eastbound hard shoulder closure between J19 and J18, planned, starts Sat 10 Oct, 20:00
- Road
- M4
- Direction
- Eastbound
- Junctions
- J19 to J18
- Starts
- Sat 10 Oct, 20:00
- Expected to clear
- Sun 11 Oct, 06:00
- Category
- Road Maintenance
- PlannedRoad closureTraffic Wales
M4 eastbound road closure from J28 Tredegar Park to J24 Coldra, planned, starts Sun 11 Oct, 20:00
- Road
- M4
- Direction
- Eastbound
- Junctions
- J28 to J24
- Area
- J28 Tredegar Park to J24 Coldra
- Starts
- Sun 11 Oct, 20:00
- Expected to clear
- Sat 17 Oct, 06:00
- Category
- Clearance Work