Road Network: M4
Location Details: M4 westbound between J20 and J21
Incident Type (Cause): Road or carriageway or lane management
Action Taken: Carriageway closures
Official Control Room Update:
Carriageway closures
Carriageway & Lane Capacity
- Lanes Currently Open (Operational): 3
- Lanes Blocked / Restricted: 3
Schedule Window
- Live Since: 29/07/2026 at 22:27
- Estimated Clear: 29/07/2026 at 22:42