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M3 traffic at 18:09 on Sunday 18 October: 1 closure running now.
From National Highways' closure report, in their words. Times can change - check before you set off.
Tap a pin for full incident detail. Live positions from National Highways.
🟢 Clear · 🟡 Delays nearby · 🔴 Severe/Crash · Status labels: 💥 CRASH · ❌ CLOSED · 🐌 SLOW · 🚧 WORKS · ⚠️ HAZARD
A red or orange junction border marks a STATS19 collision blackspot. Tap any junction for its own page — live incidents and full collision history. Tap the funnel to filter the list above.
The M3 carries up to 140,751 vehicles a day at its busiest stretch (J13–J14), including 9,901 HGVs — the 11th busiest motorway in Britain. Official Department for Transport counts, 2025.
| Road | Busiest stretch | Vehicles/day | HGVs/day | HGV share |
|---|---|---|---|---|
| M25 | near J14 | 212,636 | 14,853 | 7% |
| M6 | J20–J21 | 187,521 | 23,492 | 12.5% |
| M56 | J3–J4 | 179,634 | 7,547 | 4.2% |
| M1 | near J9 | 162,446 | 19,151 | 11.8% |
| M8 | J16–J17 | 158,065 | 7,214 | 4.6% |
| M4 | near J4 | 156,491 | 6,249 | 4% |
| M3 ◀ | J13–J14 | 140,751 | 9,901 | 7% |
Measured from 144 incidents recorded on the M3 since February 2026: the riskiest window is 12:00–15:00, when 23% of incidents start. Right now (18:00) you're outside the peak window.
| Hour | Incidents | Share |
|---|---|---|
| 00:00–01:00 | 1 | 0.7% |
| 01:00–02:00 | 3 | 2.1% |
| 02:00–03:00 | 2 | 1.4% |
| 03:00–04:00 | 2 | 1.4% |
| 04:00–05:00 | 6 | 4.2% |
| 05:00–06:00 | 3 | 2.1% |
| 06:00–07:00 | 6 | 4.2% |
| 07:00–08:00 | 7 | 4.9% |
| 08:00–09:00 | 4 | 2.8% |
| 09:00–10:00 | 8 | 5.6% |
| 10:00–11:00 | 10 | 6.9% |
| 11:00–12:00 | 10 | 6.9% |
| 12:00–13:00 ◀ peak | 7 | 4.9% |
| 13:00–14:00 ◀ peak | 15 | 10.4% |
| 14:00–15:00 ◀ peak | 11 | 7.6% |
| 15:00–16:00 | 7 | 4.9% |
| 16:00–17:00 | 10 | 6.9% |
| 17:00–18:00 | 9 | 6.3% |
| 18:00–19:00 | 8 | 5.6% |
| 19:00–20:00 | 6 | 4.2% |
| 20:00–21:00 | 3 | 2.1% |
| 21:00–22:00 | 4 | 2.8% |
| 22:00–23:00 | 1 | 0.7% |
| 23:00–00:00 | 1 | 0.7% |
The places people drive to most, the M3 junction for each, and live M3 incidents nearby at 18:09.
Boxing Day King George VI Chase; less than a mile from M3 J1
Flat and jumps racing; hosts Royal Ascot and British Champions Day
Theme park on the B3022 Windsor–Ascot road, two miles from Windsor town centre
140-acre zoo with 488,557 visitors in 2025
82,000-capacity rugby stadium; match-day parking must be booked ahead
885,266 passengers in 2025; just off M27 J5 via the A335
Based on DfT STATS19 police collision records. The M3 has 668 recorded collisions at 20 collision hotspots, involving 1,040 casualties (10 fatal). Take extra care here. Ranked by fatal, then serious collisions, then casualties - not by the number of collisions alone.
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Any M3 closure appears in the live feed above within minutes of National Highways reporting it, including tonight's overnight roadworks closures.
The live feed above shows every incident, delay, roadwork and overnight closure on the M3, updated every 5 minutes, 24 hours a day, from National Highways.
The M3 is typically busiest during morning rush hour (07:00–09:30) and evening rush hour (16:30–19:00) on weekdays.
There are currently 2 active roadwork schemes on the M3. Check the live feed above for exact locations and durations.
The M3 connects to: M25, A322, M27, A34.
Each side has its own live page: the M3 eastbound and the M3 westbound each list every accident, breakdown, closure and roadworks on that carriageway, updated every 5 minutes, 24 hours a day, from National Highways. The panel at the top of this page shows both sides at a glance.
Official Department for Transport counts (2025) record 140,751 vehicles a day on the M3's busiest stretch (J13–J14), 9,901 of them HGVs. The full breakdown and comparison chart are in the traffic statistics section above.
The M3 has the 11th busiest motorway stretch in Britain at 140,751 vehicles a day (DfT 2025), behind the M25's 212,636 a day at the top.
Measured from 144 incidents recorded on the M3 since February 2026, the riskiest window is 12:00–15:00, when 23% of incidents start. The quietest is 22:00–01:00. Incidents on the M3 typically clear in about 51 minutes.
Daily M3 incidents, posted across all four channels.
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Broken down on the M3? Pick the nearest town and call a local firm direct:
On a motorway? If you can, get onto the hard shoulder or into an emergency area, leave by the left-hand doors and wait behind the barrier. Stuck in a live lane: stay in the car with your seatbelt on and hazard lights on, and call 999.