M4 road closures & live traffic incidents

No live closures are reported on the M4 right now.

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

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M4 closures planned this week

M4 eastbound Jct 18 - lane closure (172/3 to 170/0)

Planned Roadworks National Highways

South Gloucestershire M4 · M4 Eastbound Between J19 And J18

Starts in 1 hour 59 minutes

Starts 4 Oct 2026, 20:00 Expected clear 5 Oct 2026, 05:00

M4 eastbound Jct 18 - lane closure (172/3 to 170/0)

Category: Road Maintenance

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M4 eastbound Jct 23 to 22 Prince of Wales Bridge carriageway closure

Planned Roadworks National Highways

Monmouthshire M4 · M4 Eastbound Between J23 And J22

Starts in 1 hour 59 minutes

Starts 4 Oct 2026, 20:00 Expected clear 5 Oct 2026, 05:00

M4 eastbound Jct 23 to 22 Prince of Wales Bridge carriageway closure

Category: Road Maintenance

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Recently cleared on the M4

All live closures M4 closure history