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M4 westbound carriageway closure between J20 and J21, 5 Oct 2026

Live incident

This incident on the M4 is in force now. It started at 20:22 on Mon 5 Oct.

Last updated by National Highways at 20:50 on Monday 5 October 2026.

Closure details and map

Status
Live incident
Closure type
Carriageway closure
Category
Incident
Road
M4
Direction
Westbound
Junctions
J20 to J21
Location
M4 westbound between J20 and J21
Started
20:22 on Monday 5 October 2026
Source
National Highways
Last updated by the source
20:50 on Monday 5 October 2026

Map of the M4 westbound carriageway closure between J20 and J21

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  • Live incident

Other M4 closures and crash records

22 other closures are in force on the M4 right now, and 42 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