Home › Traffic › M4 › Incident #24042653

COMPLETED Severe Road Traffic Collision M4 Eastern

M4 westbound between J11 and J12 | Westbound | Accident

🕐 13 Mar 2026, 14:03 ⏱️ 2h 1m 👁️ 71 views REF-24042653 🕐 Last verified 13 Mar, 16:05

👁️ 71 viewed today ✓ National Highways verified

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Official Source Data — This incident was recorded from National Highways live data feeds at the time it was reported. Incident data is removed from public feeds once cleared — this page preserves that record.

📊 Incident Summary

Status

✓ Completed

Severity

Severe

Road

Region

Eastern

County

West Berkshire

Category

Accident

Started

13 Mar, 14:03

Duration

2h 1m

Road Type

Motorway

Speed Limit

70 mph (variable)

Weather

☁️ Overcast

Vehicles

2 referenced

Road Risk (30d)

Very High

More severe than 70% of incidents on M4 this month

📝 Description

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 close

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Full Incident Description

Complete details including emergency services, lane closures, clearance estimates and diversions

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⏱️ Timeline & Duration Analysis

First Reported

14:03 GMT

Peak Delay

██:██ GMT

Cleared

██:██ GMT

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Timeline & Duration Analysis

Full timestamps, peak delay window, clearance time

🛡️ Incident Data Pack

Ref: NH-UKTU-24042653

GPS: 51.43°N, ████°W

Road: Motorway, 70 mph (variable)

Conditions: Dry

🛡️

Incident Data Pack

GPS, weather, road conditions — full incident documentation

📈 Historical Pattern — M4

141

30d Total

Severe

📈

30-Day Historical Pattern

Frequency, severity trends, peak danger times

📡

Live Incident Timeline

1 update captured · Cleared

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✓ Weather & road surface at incident

✓ Emergency services confirmed

✓ Insurance claim checklist

✓ 3 ready-to-use template letters

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📊 M4 — 30 Days

Total

141

Severe

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M4 westbound between J11 and J12 | Westbound | Accident