M4 road closures & live traffic incidents

No live incident closures on the M4 right now, but 1 roadwork is currently in force.

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 roadworks in force now

M4 eastbound Jct 20 - lane closure (186/6 to 184/2)

Planned Roadworks National Highways

South Gloucestershire M4 · M4 Eastbound Between J20 And J19

Expected to clear in 14 minutes 33 seconds

Started 11 Oct 2026, 20:00 Expected clear 12 Oct 2026, 05:00

M4 eastbound Jct 20 - lane closure (186/6 to 184/2)

Category: Road Maintenance

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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 1 hour 14 minutes

Starts 12 Oct 2026, 06:00 Expected clear 12 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 3 closure (76/8 to 74/2)

Planned Roadworks National Highways

West Berkshire M4 · M4 Eastbound Between J13 And J12

Starts in 14 hours 14 minutes

Starts 12 Oct 2026, 19:00 Expected clear 13 Oct 2026, 05:00

M4 eastbound lane 3 closure (76/8 to 74/2)

Category: Road Maintenance

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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 16 hours 14 minutes

Starts 12 Oct 2026, 21:00 Expected clear 13 Oct 2026, 04:30

M4 Eastbound Jct 3 to Jct 2 lane 1 closure

Category: Construction Work

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M4 Eastbound Jct 2 exit slip road closure

Planned Roadworks National Highways

Hounslow M4 · M4 J2 Eastbound Exit

Starts in 16 hours 14 minutes

Starts 12 Oct 2026, 21:00 Expected clear 13 Oct 2026, 04:30

M4 Eastbound Jct 2 exit slip road closure

Category: Construction Work

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Recently cleared on the M4

All live closures M4 closure history