M3 crash J4–J4A westbound
Cleared Cleared at 12:42 on 27 Sept 2026, after 1 h 21 min.
Crash on the M3 westbound at J4–J4A on Sunday 27 September 2026, from 11:21. Cleared at 12:42 after 1 h 21 min. Timeline of reports from the motorway signs, TomTom and National Highways.
M3 westbound · J4–J4A
Collision
Road closed · 11:21–12:42 (cleared after 1 h 21 min) · delay ~4 min · queue 3.5 mi
Motorway signs ×3 · TomTom · National Highways ×6
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Timeline
- Motorway signs: “COLLISION [HCA0]”
- Motorway signs: “COLLISION ON SLIP ROAD[HCA0]”
- National Highways: 1 of 4 lanes closed
- National Highways: 1 of 4 lanes closed
- National Highways: road closed
- TomTom: collision, “Stationary traffic, Incident”, delay ~10 min
- TomTom: “Queuing traffic, Incident”
- TomTom: “Slow traffic, Incident”
- Motorway signs no longer show “COLLISION [HCA0]”
- TomTom: now says queueing traffic, “Slow traffic”
- National Highways: 1 of 4 lanes closed
- National Highways: 2 of 4 lanes closed
- TomTom no longer reports it
- Motorway signs no longer show “COLLISION [HCA0]”
- Motorway signs no longer show “COLLISION ON SLIP ROAD[HCA0]”
- National Highways: lane closure lifted
- All clear: no source reports it any more
What the sources said
- Overhead signs read “COLLISION [HCA0]” (4 signs; furthest along: M3 westbound between J4 and J4A).
- Slow traffic
- M3 westbound between J4 and J4A
- Overhead signs read “COLLISION [HCA0]” (1 sign; furthest along: M3 westbound within J4A).
- Overhead signs read “COLLISION ON SLIP ROAD[HCA0]” (1 sign; furthest along: M3 westbound between J4 and J4A).
- M3 eastbound between J4 and J3
Other recent incidents on the M3
About this page
This page shows what the data sources reported about this event and when, merged from every source that reported it at the same place. It doesn't say what caused it or whether anyone was hurt: no source reports that. Times are UK time. For live alerts, follow @motorways.me on Bluesky.