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 westbound Jct 6 entry slip road closure

Active Roadworks National Highways

Slough M4 · M4 J6 Westbound Access

Expected to clear in 2 hours 29 minutes

Started 5 Aug 2026, 20:18 Expected clear 6 Aug 2026, 05:00

M4 westbound Jct 6 entry slip road closure

Category: Road Maintenance

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M4 closures planned this week

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

Planned Roadworks National Highways

West Berkshire M4 · M4 Eastbound Between J13 And J12

Starts in 16 hours 29 minutes

Starts 6 Aug 2026, 19:00 Expected clear 7 Aug 2026, 05:00

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

Category: Road Maintenance

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M4 eastbound lane 4 and lane 3 closure (50/6 to 49/5)

Planned Roadworks National Highways

Windsor And Maidenhead M4 · M4 Eastbound Between J10 And J8

Starts in 16 hours 29 minutes

Starts 6 Aug 2026, 19:00 Expected clear 7 Aug 2026, 05:00

M4 eastbound lane 4 and lane 3 closure (50/6 to 49/5)

Category: Road Maintenance

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M4 eastbound lanes 1 and 2 closed

Planned Roadworks National Highways

South Gloucestershire M4 · M4 Eastbound Between J19 And J18

Starts in 16 hours 29 minutes

Starts 6 Aug 2026, 19:00 Expected clear 7 Aug 2026, 05:00

M4 eastbound lanes 1 and 2 closed

Category: Construction Work

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M4 westbound Jct 11 entry slip road closure

Planned Roadworks National Highways

Reading M4 · M4 J11 Westbound Access

Starts in 17 hours 29 minutes

Starts 6 Aug 2026, 20:00 Expected clear 7 Aug 2026, 05:00

M4 westbound Jct 11 entry slip road closure

Category: Road Maintenance

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Recently cleared on the M4

All live closures M4 closure history