Racecourse
Kempton Park Racecourse
Sunbury-on-Thames, Surrey🛣️ M3 junction: J1
✅ No M3 incidents reported within 3 miles
Boxing Day King George VI Chase; less than a mile from M3 J1
🚨 Live M3 Incidents & Roadworks
Updates every 5 min
No live incidents on the M3 right now — checking National Highways every 5 minutes, 24/7. Closures are listed below.
🌙 M3 closures tonight and the next 3 days 7
From National Highways' closure report, in their words. Times can change - check before you set off.
- Partial closureNorthbound M3 northbound Jct 9 entry slip road closureNow · until 06:00 Mon 1 Nov
- Full closureSouthbound M3 southbound Jct 5 to Jct 6 carriageway closureTomorrow night · 21:00–06:00
- Full closureNorthbound M3 northbound Jct 11 to Jct 8 carriageway closureTomorrow night · 21:00–06:00
- Partial closureSouthbound M3 southbound Jct 12 exit slip road closureTomorrow night · 21:00–06:00
- Partial closureNorthbound M3 northbound Jct 4 exit slip road closureTomorrow night · 21:00–06:00
- Partial closureNorthbound M3 northbound Jct 4 entry slip road closureTomorrow night · 21:00–06:00
Show all 7 closures
- Partial closureWestbound M3 Westbound Jct 1 exit slip road closureTomorrow night · 22:00–05:30Diversion: Diversion via Local Authority and National Highway network
Spotted something on the M3?
Warn other drivers in real time — thousands check these pages every day
💥 Crash⚠️ Hazard⛔ Closure🐌 Queue
📹 Latest M3 videos
🗺️ M3 Traffic Map — Where It's Happening
Tap a pin for full incident detail. Live positions from National Highways.
🔢 M3 Junction Status
Tap a junction for its pageJ3Lightwater & Bagshot61 crashes
J4Farnborough & Camberley43 crashes
J6Basingstoke & Old Basing26 crashes
J8Popham & Micheldever23 crashes
J9Winchester & Kings Worthy16 crashes
J10Winchester & Bar End100 crashes
J11Winchester & Twyford51 crashes
J12Eastleigh & Chandlers Ford33 crashes
🟢 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.
📊 How busy is the M3?
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.
140,751
🚗 vehicles a day · J13–J14
9,901
🚛 lorries a day
2025
📅 DfT count year
share of traffic on the busiest stretch
Busiest stretch of each motorway — vehicles a day
M25
212,636
M6
187,521
M56
179,634
M1
162,446
M8
158,065
M4
156,491
M3
140,751
View as table
| 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% |
Source: Department for Transport road traffic statistics, average annual daily flows 2025. Official counts, updated yearly.
📈 M3 Journey Pulse — when incidents actually happen
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 (22:00) this is one of its calmest hours.
00
04
08
12
16
20
📈 Busiest 12:00–15:00
😌 Quietest 22:00–01:00
🕒 Typically clears in ~51 min ⏱ Typical delay ~10 min 📅 Weekdays see ~1.2× the weekend rate
View as table
| 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% |
Measured from 144 incidents recorded by this site since February 2026 (planned roadworks excluded). Recomputed nightly from our incident archive.
🧭 Along the M3
🔀 Major interchanges — where the M3 meets other roads
🔀J2
M25 Interchange
The M3's connection to the London orbital
⛰️J9
Twyford Down
Deep chalk cutting near Winchester, completed 1995
🔀J14
M27 Interchange
Southern end at Southampton, joining the M27
🏉
Twickenham Stadium
Via the A316 at the eastern end, off Whitton Road
📍 Heading to… off the M3
The places people drive to most, the M3 junction for each, and live M3 incidents nearby at 22:29.
Racecourse
Ascot Racecourse
Ascot, Berkshire🛣️ M3 junction: J3
✅ No M3 incidents reported within 3 miles
Flat and jumps racing; hosts Royal Ascot and British Champions Day
Theme park
LEGOLAND Windsor Resort
Windsor, Berkshire🛣️ M3 junction: J3
✅ No M3 incidents reported within 3 miles
Theme park on the B3022 Windsor–Ascot road, two miles from Windsor town centre
Zoo & wildlife
Marwell Zoo
Colden Common, Winchester, Hampshire🛣️ M3 junction: J11
✅ No M3 incidents reported within 3 miles
140-acre zoo with 488,557 visitors in 2025
Stadium
Allianz Stadium Twickenham
Twickenham, Greater London🛣️ Via the M3
✅ No M3 incidents reported within 3 miles
82,000-capacity rugby stadium; match-day parking must be booked ahead
Airport
Southampton Airport
Eastleigh, Hampshire🛣️ Via the M3
✅ No M3 incidents reported within 3 miles
885,266 passengers in 2025; just off M27 J5 via the A335
⚠️ Most Dangerous M3 Junctions
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.
#1
Severe Blackspot
J10
100 collisions · 148 casualties · 2 fatal · 17 serious
#2
Severe Blackspot
J3
61 collisions · 99 casualties · 1 fatal · 16 serious
#3
Severe Blackspot
J11
51 collisions · 80 casualties · 1 fatal · 9 serious
#4
Severe Blackspot
nr Camberley
35 collisions · 66 casualties · 1 fatal · 9 serious
#5
Severe Blackspot
nr Fleet
23 collisions · 37 casualties · 1 fatal · 8 serious
#6
Severe Blackspot
J9
16 collisions · 22 casualties · 1 fatal · 6 serious
🛒 Journey Essentials
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❓ M3 Traffic — Frequently Asked Questions
Is the M3 closed today?
Any M3 closure appears in the live feed above within minutes of National Highways reporting it, including tonight's overnight roadworks closures.
Is there traffic on the M3 today?
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.
What is the worst time to use the M3?
The M3 is typically busiest during morning rush hour (07:00–09:30) and evening rush hour (16:30–19:00) on weekdays.
Are there roadworks on the M3 right now?
There is currently 1 active roadwork scheme on the M3. Check the live feed above for exact locations and durations.
What roads connect to the M3?
The M3 connects to: M25, A322, M27, A34.
Is there an accident on the M3 eastbound or westbound today?
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.
How many vehicles use the M3 every day?
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.
How busy is the M3 compared with other motorways?
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.
What time of day is the M3 worst for incidents?
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.
📊 M3 Status Summary
0
Active incidents
0
Severe/serious
1
Roadworks
22:29
Last updated
🆘 Broken down on the M3?
One free request reaches local recovery firms
ℹ️ M3 Road Details
- Length
- 52 miles
- Junctions
- J1–J14
- From
- London (Sunbury)
- To
- Southampton (M27)
- Type
- Motorway
- AM Rush
- 07:00–09:30
- PM Rush
- 16:30–19:00
📍 Key M3 Locations
Sunbury
Basingstoke
Winchester
Southampton
🔗 Roads Connecting to the M3
🛣️ M3 Services & Motorway Stops
🔗 Related Tools
📱 Follow M3 Updates
Daily M3 incidents, posted across all four channels.
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