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CrashStats

M4 westbound lane closure at J4B, 12 Aug 2026

Cleared

This incident on the M4 has cleared. It started at 21:47 on Wed 12 Aug and cleared at 22:00 on Wed 12 Aug.

Last updated by National Highways at 22:00 on Wednesday 12 August 2026.

Closure details and map

Status
Cleared
Closure type
Lane closure
Category
Incident
Road
M4
Direction
Westbound
Junctions
J4B
Location
M4 westbound within J4B
Started
21:47 on Wednesday 12 August 2026
Cleared
22:00 on Wednesday 12 August 2026
Source
National Highways
Last updated by the source
22:00 on Wednesday 12 August 2026

Map of the M4 westbound lane closure at J4B

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  • Cleared

Other M4 closures and crash records

8 other closures are in force on the M4 right now, and 57 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.

All M4 closures