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M4
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M4 Westbound Traffic

M4 Motorway · Westbound carriageway — live updates every 5 minutes, 24/7
M4 WESTBOUND TRAFFIC NOW
M4 WESTBOUND J1 TO 3CLOSED 22:00–05:30PLANNED CLOSURE TONIGHT
Planned tonight, 1 of 1
Clear ⏱ Updated 14:17

M4 westbound traffic at 14:17 on Tuesday 3 November: 2 closures running now · 1 closure tonight.

→ M4 eastbound traffic ⤴ All M4 traffic — both directions
🚨 0 incidents 🚧 2 roadworks · 9 soon
🔍
190 miles long
Junctions J1–J49
Regions: London, South East, South West, Wales
Home › Traffic › Roads › M4 › Westbound

🚨 M4 Westbound traffic now: live incidents & roadworks

Updates every 5 min
Share M4 status: 💬 📘 X
No live incidents on the M4 right now — checking National Highways every 5 minutes, 24/7. Closures are listed below.

🌙 M4 westbound closures tonight and the next 3 days 11

From National Highways' closure report, in their words. Times can change - check before you set off.

  • Partial closure
    Westbound M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed
    Now · until 06:00 Sat 5 Dec
    Diversion: Diversion via M5 southbound, exit Jct 16 to turn and return M5 northbound.
  • Partial closure
    Northbound M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed
    Now · until 06:00 Sat 5 Dec
    Diversion: Diversion via M5 southbound, exit Jct 16 to turn and return M5 northbound.
  • Full closure
    Westbound M4 Westbound Jct 1 to 3 carriageway closure
    Tonight · 22:00–05:30
    Diversion: Diversion via Local Authorities and National Highways Network
  • Full closure
    Westbound M4 westbound Jct 15 to Jct 16 carriageway closure
    Tomorrow night · 21:00–06:00
    Diversion: Diversion via A419, A4259, A3102.
  • Full closure
    Westbound M4 westbound Jct 15 entry slip road carriageway closure
    Tomorrow night · 21:00–06:00
    Diversion: Diversion via A419, A4259, A3102.
  • Partial closure
    Westbound M4 westbound Jct 12 exit slip road closure
    Tonight · 21:00–06:00
Show all 11 closures
  • Partial closure
    Westbound M4 westbound Jct 12 entry slip road closure
    Tonight · 21:00–06:00
  • Partial closure
    Westbound M4 westbound Membury Services exit slip road closure
    Tomorrow night · 21:00–06:00
  • Partial closure
    Westbound M4 westbound Jct 11 exit slip road closure
    Tomorrow night · 21:00–06:00
  • Partial closure
    Westbound M4 westbound Jct 13 entry slip road closure
    Thu 5 Nov · 21:00–06:00
  • Partial closure
    Westbound M4 westbound Jct 19 entry slip road closed
    Thu 5 Nov · 21:00–06:00
    Diversion: Diversion via A4174, A38, M5
All M4 roadworks & diversions →

Is the M4 westbound closed? Quick answers

Checked 14:17 on Tuesday 3 November 2026.

Is the M4 westbound closed right now?

No. There is no full closure on the M4 westbound at 14:17.

Is there an incident on the M4 westbound right now?

No. No incidents are reported on the M4 westbound at 14:17.

Is the M4 westbound closed tonight?

Yes. The M4 westbound has 1 full closure planned tonight (Tue 3 Nov, 18:00 to 06:00): Westbound Jct 1 to 3 carriageway closure, 22:00 to 05:30. Plus 4 lane or slip road closures. Diversion: Diversion via Local Authorities and National Highways Network.

Tonight: M4 closures and diversions ›

Is the M4 westbound closed this weekend?

No full closures. The M4 westbound stays open this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00). 5 lane or slip road closures are planned: westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, since Sun 11 Oct 22:00, until Sat 5 Dec 06:00; and westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed, since Sun 11 Oct 22:00, until Sat 5 Dec 06:00 and 3 more.

This weekend: M4 closures and diversions ›

Is there an accident on the M4 westbound today?

No. No collision has been reported on the M4 westbound since midnight.

M4 accidents today and yesterday ›

Answers use official data only: the National Highways live incident feed and their planned closure report. Times can change, so check before you set off.

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ℹ️ About M4 westbound traffic

This page tracks live M4 traffic westbound only — every incident, closure and roadworks National Highways publish for the westbound carriageway, updated every 5 minutes, 24 hours a day. Anything they list without naming a direction is shown here too, so nothing is missed.

Heading the other way? See M4 eastbound traffic. The full M4 traffic page covers both directions, with the live map, junction-by-junction status, the latest M4 videos and tonight's M4 roadworks.

❓ M4 Westbound Traffic — Frequently Asked Questions

Is the M4 westbound closed today?

No — as of 14:17 National Highways list no full closure on the M4 westbound. Live updates every 5 minutes.

Are there any accidents on the M4 westbound today?

None reported at 14:17 — the live board above updates every 5 minutes, 24 hours a day.

Is there an incident on the M4 westbound right now?

No incidents reported at 14:17 — no police incidents, obstructions, breakdowns or collisions on the M4 westbound. The live board above updates every 5 minutes, 24 hours a day.

Why is the M4 slow westbound today?

Nothing is listed right now — when the board above is clear, slow westbound traffic is usually rush-hour volume (07:00–09:00 and 16:30–18:30 on weekdays).

Are there roadworks on the M4 westbound tonight?

Yes — 3 overnight closures are scheduled on the M4 westbound. Times and junctions are in the closures list above and on the M4 roadworks page.

Where can I check live M4 traffic westbound?

Right here — this page is live M4 traffic for the westbound carriageway, updated every 5 minutes from National Highways, 24 hours a day. The full M4 page covers both directions with the live map and junction-by-junction status.

Which part of the M4 does this page cover?

The whole westbound carriageway, end to end — the M4 runs between London (Chiswick) and Pont Abraham (Wales). The eastbound side has its own page.

🧭 More M4 coverage

M4 traffic — both directions M4 eastbound traffic M4 roadworks tonight

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