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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.

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Active roadworks
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M4 roadworks in force now

M4 Northbound Jct 4A to Jct 4 lane 1 closure

Active Roadworks National Highways
Hounslow M4 · M4 Spur (Heathrow) Southbound Between M4 And J4A

Expected to clear in 4 hours 36 minutes

Started 31 Jul 2026, 22:00 Expected clear 1 Aug 2026, 04:30

M4 Northbound Jct 4A to Jct 4 lane 1 closure

Category: Road Maintenance
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Recently cleared on the M4

All live closures M4 closure history