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At a glance

🕐 Last verified 13 Mar, 16:05

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StatusCleared
Severity (NH)Severe
RoadM4
DirectionWestbound
RegionEastern
CountyWest Berkshire
Category (NH)Accident
ReportedFri 13 Mar, 14:03
Cleared16:05
Lasted2h 1m
Road typeMotorway
Speed limit70 mph (variable)
Weather🌨️ Slight snow
ReferenceREF-24042653

Times are UK time.

What National Highways say

M4 westbound between J11 and J12 | Westbound | Accident

Location : The M4 westbound between junctions J11 and J12 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 16:00 and 16:15 on 13 March 2026. Return To Normal : Normal traffic conditions are expected between 16:00 and 16:15 on 13 March 2026. Lanes Closed : There is one of four lanes closed.

The official National Highways record of this incident, kept here after the road reopens.

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1 update captured · Cleared

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Also on the M4 today

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Recent M4 incidents

182 incidents and roadworks logged on the M4 in the last 30 days, 56 of them serious or severe. Times are UK time.

M4 | Berkshire | Carriageway Closure | DelaysWed 9 Sep, 21:42 M4 | Berkshire | Carriageway Closure | Long Delays 30 minutesWed 9 Sep, 21:42 M4 | Greater London | Carriageway ClosureWed 9 Sep, 01:27 M4 | Gloucestershire | Road Closure | Expect DelaysWed 2 Sep, 22:45 M4 | Wiltshire | Carriageway Closure | Expect DelaysSat 15 Aug, 02:59 M4 | Wiltshire | Carriageway Closure | Expect DelaysThu 6 Aug, 09:35
Every M4 incident

Common questions

Is the M4 closed?

Not because of this crash. It cleared at 16:05 UK time on Fri 13 Mar. See the M4 right now.

What happened on the M4 on 13 Mar 2026?

Crash on the M4 westbound J11 to J12 in West Berkshire, reported at 14:03 UK time on Fri 13 Mar. Cleared at 16:05.

How long did it last?

2h 1m, from 14:03 UK time on Fri 13 Mar.

Where can I see everything else on the M4?

The M4 live page shows what is happening now, and the M4 archive has every incident on record.

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