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M4 road closures & live traffic incidents

No live closures are reported on the M4 right now.

Live M4 updates from National Highways and Traffic Wales: incident closures, roadworks in force, planned closures for the week ahead and recently cleared disruption.

Live incident
Active roadworks
Planned
Cleared
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M4 closures planned this week

M4 eastbound Jct 18 to 17 lane closure (166/5 to 162/1)

Planned Roadworks National Highways
South Gloucestershire M4 · M4 Eastbound Between J18 And J17

Starts in 58 minutes 55 seconds

Starts 15 Oct 2026, 06:00 Expected clear 15 Oct 2026, 17:00

M4 eastbound Jct 18 to 17 lane closure (166/5 to 162/1)

Category: Road Maintenance
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M4 eastbound lane 1 and 2 closure (47/0 to 44/7)

Planned Roadworks National Highways
Windsor And Maidenhead M4 · M4 Eastbound Within J8

Starts in 13 hours 58 minutes

Starts 15 Oct 2026, 19:00 Expected clear 16 Oct 2026, 05:00

M4 eastbound lane 1 and 2 closure (47/0 to 44/7)

Category: Road Maintenance
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Lane closure

Planned Roadworks National Highways
Wiltshire M4 · M4 Westbound Between J16 And J17

Starts in 13 hours 58 minutes

Starts 15 Oct 2026, 19:00 Expected clear 16 Oct 2026, 05:00

lane closure

Category: Road Maintenance
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M4 eastbound lane 4 closure (69/6 to 64/9)

Planned Roadworks National Highways
Reading M4 · M4 Eastbound Between J11 And J10

Starts in 13 hours 58 minutes

Starts 15 Oct 2026, 19:00 Expected clear 16 Oct 2026, 05:00

M4 eastbound lane 4 closure (69/6 to 64/9)

Category: Road Maintenance
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M4 eastbound lane 4 closure (69/4 to 64/9)

Planned Roadworks National Highways
Reading M4 · M4 Eastbound Between J12 And J11

Starts in 13 hours 58 minutes

Starts 15 Oct 2026, 19:00 Expected clear 16 Oct 2026, 05:00

M4 eastbound lane 4 closure (69/4 to 64/9)

Category: Road Maintenance
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M4 eastbound Jct 17 to Jct 16 - lane closure

Planned Roadworks National Highways
Wiltshire M4 · M4 Westbound Between J16 And J17

Starts in 14 hours 58 minutes

Starts 15 Oct 2026, 20:00 Expected clear 16 Oct 2026, 05:00

M4 eastbound Jct 17 to Jct 16 - lane closure

Category: Road Maintenance
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M4 Eastbound Jct 2 exit slip road closure

Planned Roadworks National Highways
Hounslow M4 · M4 J2 Eastbound Exit

Starts in 15 hours 58 minutes

Starts 15 Oct 2026, 21:00 Expected clear 16 Oct 2026, 04:30

M4 Eastbound Jct 2 exit slip road closure

Category: Construction Work
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M4 Eastbound Jct 3 to Jct 2 lane 1 closure

Planned Roadworks National Highways
Hounslow M4 · M4 Eastbound Between J3 And J2

Starts in 15 hours 58 minutes

Starts 15 Oct 2026, 21:00 Expected clear 16 Oct 2026, 04:30

M4 Eastbound Jct 3 to Jct 2 lane 1 closure

Category: Construction Work
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Recently cleared on the M4

All live closures M4 closure history