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M4 road closure in both directions between J25A and J27, 5 Oct 2026

Active roadworks

This roadworks closure on the M4 is in force now. It started at 20:00 on Mon 5 Oct and is expected to clear at 06:00 on Sat 10 Oct.

Last updated by Traffic Wales at 20:00 on Monday 5 October 2026.

Closure details and map

Status
Active roadworks
Closure type
Road closure
Category
Carriageway Maintenance
Road
M4
Direction
Both directions
Junctions
J25A to J27
Location
J25A Grove Park to J27 High Cross
Working hours
20:00 to 06:00 overnight
Started
20:00 on Monday 5 October 2026
Expected to clear
06:00 on Saturday 10 October 2026
Details
Carriageway maintenance, closed, diversions in place
Source
Traffic Wales
Last updated by the source
20:00 on Monday 5 October 2026

Map of the M4 road closure in both directions between J25A and J27

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  • Active roadworks

Other M4 closures and crash records

9 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