M4 | Berkshire | Carriageway Closure | Delays — Cleared 10 Sep

What happened

The M4 in Berkshire is closed westbound between J8/9 (Maidenhead) and J10 (Reading) due to a collision

RoadM4

SeveritySevere

StatusCleared

DirectionWestbound

Started21:42, 9 Sep 2026

Cleared14:56, 10 Sep 2026

Lasted17h 13m

21:42, 9 SepFirst report
The M4 in Berkshire is closed westbound between J8/9 (Maidenhead) and J10 (Reading) due to a collision
13:41, 10 SepUpdate
The M4 in Berkshire is closed westbound between J8/9 (Maidenhead) and J10 (Reading) due to a collision
14:11, 10 SepUpdate
⏱ Still active — no changes from National Highways. Incident ongoing for 16h 29m. Monitoring continues.
14:16, 10 SepUpdate
The M4 in Berkshire is closed westbound between J8/9 (Maidenhead) and J10 (Reading) due to a collision
14:46, 10 SepUpdate
⏱ Still active — no changes from National Highways. Incident ongoing for 17h 4m. Monitoring continues.
14:51, 10 SepUpdate
The M4 in Berkshire is closed westbound between J8/9 (Maidenhead) and J10 (Reading) due to a collision

Wording from National Highways, recorded as it changed.

Enter when you were on the M4 to check.