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M4 traffic at 08:34 on Monday 12 October: road closed northbound until 06:00 Sat 5 Dec · 2 live incidents (2 severe/serious) · 1 closure tonight.
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 M4 carries up to 156,491 vehicles a day at its busiest stretch (near J4), including 6,249 HGVs — the 6th 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% |
Measured from 257 incidents recorded on the M4 since January 2026: the riskiest window is 14:00–17:00, when 23% of incidents start. Right now (08:00) you're outside the peak window.
| Hour | Incidents | Share |
|---|---|---|
| 00:00–01:00 | 4 | 1.6% |
| 01:00–02:00 | 5 | 1.9% |
| 02:00–03:00 | 5 | 1.9% |
| 03:00–04:00 | 6 | 2.3% |
| 04:00–05:00 | 4 | 1.6% |
| 05:00–06:00 | 7 | 2.7% |
| 06:00–07:00 | 13 | 5.1% |
| 07:00–08:00 | 13 | 5.1% |
| 08:00–09:00 | 15 | 5.8% |
| 09:00–10:00 | 10 | 3.9% |
| 10:00–11:00 | 11 | 4.3% |
| 11:00–12:00 | 9 | 3.5% |
| 12:00–13:00 | 17 | 6.6% |
| 13:00–14:00 | 13 | 5.1% |
| 14:00–15:00 ◀ peak | 20 | 7.8% |
| 15:00–16:00 ◀ peak | 20 | 7.8% |
| 16:00–17:00 ◀ peak | 18 | 7% |
| 17:00–18:00 | 12 | 4.7% |
| 18:00–19:00 | 8 | 3.1% |
| 19:00–20:00 | 11 | 4.3% |
| 20:00–21:00 | 13 | 5.1% |
| 21:00–22:00 | 12 | 4.7% |
| 22:00–23:00 | 6 | 2.3% |
| 23:00–00:00 | 5 | 1.9% |
Based on DfT STATS19 police collision records. The M4 has 1,215 recorded collisions at 54 collision hotspots, involving 1,851 casualties (40 fatal). Take extra care here.
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Q: Is the M4 closed today?
Yes — the M4 is closed right now: M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, until 06:00 Sat 5 Dec.
Q: Is there traffic on the M4 today?
The M4 is closed right now: M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, until 06:00 Sat 5 Dec. Check the live feed above for every closure on the route.
Q: What is the worst time to use the M4?
The M4 is typically busiest during morning rush hour (07:00–09:30) and evening rush hour (16:30–19:30) on weekdays.
Q: Are there roadworks on the M4 right now?
There are currently 3 active roadwork schemes on the M4. Check the live feed above for exact locations and durations.
Q: What roads connect to the M4?
The M4 connects to: M25, M32, M48, M5, A34, A46.
Q: How many vehicles use the M4 every day?
Official Department for Transport counts (2025) record 156,491 vehicles a day on the M4's busiest stretch (near J4), 6,249 of them HGVs. The full breakdown and comparison chart are in the traffic statistics section above.
Q: How busy is the M4 compared with other motorways?
The M4 has the 6th busiest motorway stretch in Britain at 156,491 vehicles a day (DfT 2025), behind the M25's 212,636 a day at the top.
Q: What time of day is the M4 worst for incidents?
Measured from 257 incidents recorded on the M4 since January 2026, the riskiest window is 14:00–17:00, when 23% of incidents start. The quietest is 00:00–03:00. Incidents on the M4 typically clear in about 65 minutes.
Q: Is there a toll on the M4 Severn crossing?
No — tolls on the Prince of Wales Bridge (M4) and the original Severn Bridge (M48) were abolished on 17 December 2018. Both crossings between England and Wales are now free in both directions.
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