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 lane 1, 2 and 3 closure (34/6 to 32/1)

Planned Roadworks National Highways

Slough M4 · M4 Eastbound Between J6 And J5

Expected to clear in 8 hours 52 minutes

Started 29 Jul 2026, 20:00 Expected clear 30 Jul 2026, 05:00

M4 eastbound lane 1, 2 and 3 closure (34/6 to 32/1)

Category: Road Maintenance

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M4 closures planned this week

M4 Northbound Jct 4A to Jct 4 lane 1 closure

Planned Roadworks National Highways

Hounslow M4 · M4 Spur (Heathrow) Southbound Between M4 And J4A

Starts in 52 minutes 24 seconds

Starts 29 Jul 2026, 21:00 Expected clear 30 Jul 2026, 04:30

M4 Northbound Jct 4A to Jct 4 lane 1 closure

Category: Road Maintenance

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M4 Eastbound Jct 4 to Jct 3 lane 2,3 closure

Planned Roadworks National Highways

Hounslow M4 · M4 Eastbound Between J4 And J3

Starts in 52 minutes 24 seconds

Starts 29 Jul 2026, 21:00 Expected clear 30 Jul 2026, 04:30

M4 Eastbound Jct 4 to Jct 3 lane 2,3 closure

Category: Road Maintenance

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M4 Eastbound Jct 3 to Jct 1 Carriageway closure

Planned Roadworks National Highways

Hounslow M4 · M4 J2 Eastbound Access

Starts in 52 minutes 24 seconds

Starts 29 Jul 2026, 21:00 Expected clear 30 Jul 2026, 04:30

M4 Eastbound Jct 3 to Jct 1 Carriageway closure

Category: Road Maintenance

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Recently cleared on the M4

All live closures M4 closure history