M4 road closures & live traffic incidents

No live incident closures on the M4 right now, but 5 roadworks are 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 4 to Jct 3 lane 2,3 closure

Planned Roadworks National Highways

Hounslow M4 · M4 Eastbound Between J4 And J3

Expected to clear in 7 hours 26 minutes

Started 3 Aug 2026, 21:00 Expected clear 4 Aug 2026, 04:30

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

Category: Road Maintenance

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M4 eastbound Jct 7 entry slip road closure

Planned Roadworks National Highways

Slough M4 · M4 Eastbound Between J7 And J6

Expected to clear in 7 hours 56 minutes

Started 3 Aug 2026, 20:00 Expected clear 4 Aug 2026, 05:00

M4 eastbound Jct 7 entry slip road closure

Category: Road Maintenance

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M4 eastbound Jct 18 to 17 - single lane running (166/1 to 161/7)

Active Roadworks National Highways

South Gloucestershire M4 · M4 Eastbound Between J18 And J17

Expected to clear in 7 hours 56 minutes

Started 3 Aug 2026, 18:51 Expected clear 4 Aug 2026, 05:00

M4 eastbound Jct 18 to 17 - single lane running (166/1 to 161/7)

Category: Road Maintenance

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M4 eastbound lanes 1 and 2 closed

Active Roadworks National Highways

South Gloucestershire M4 · M4 Eastbound Between J19 And J18

Expected to clear in 7 hours 56 minutes

Started 3 Aug 2026, 18:43 Expected clear 4 Aug 2026, 05:00

M4 eastbound lanes 1 and 2 closed

Category: Construction Work

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M4 eastbound lane 1 and 2 closure (81/3 to 80/4)

Active Roadworks National Highways

West Berkshire M4 · M4 Eastbound Between J13 And J12

Expected to clear in 7 hours 56 minutes

Started 3 Aug 2026, 18:38 Expected clear 4 Aug 2026, 05:00

M4 eastbound lane 1 and 2 closure (81/3 to 80/4)

Category: Road Maintenance

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Recently cleared on the M4

All live closures M4 closure history