A40 road closures & live traffic incidents

No live incident closures on the A40 right now, but 1 roadwork is currently in force.

Live A40 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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A40 roadworks in force now

A4020 Oxford Road to A40 Denham Roundabout Westbound Jct 1 Exit Slip Lane 2 Closure

Planned Roadworks National Highways

Hillingdon A40 · Roundabout At M40 J1/A40

Expected to clear in 3 hours 11 minutes

Started 12 Oct 2026, 21:00 Expected clear 13 Oct 2026, 04:00

A4020 Oxford Road to A40 Denham Roundabout Westbound Jct 1 Exit Slip Lane 2 Closure

Category: Road Maintenance

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Recently cleared on the A40

Contra flow westbound with eastbound closed from Horseshoe Drive
Cleared

Cleared 12 minutes 59 seconds ago
Contra flow westbound with eastbound closed from Horseshoe Drive
Cleared

Cleared 12 minutes 59 seconds ago
A40 eastbound lane 2 closure
Cleared

Cleared 52 minutes 59 seconds ago
Lane 1 closure
Cleared

Cleared 2 days 19 hours ago
Lane closure switching eastbound
Cleared

Cleared 5 days 9 hours ago
Lane 2 closure eastbound
Cleared

Cleared 6 days 4 hours ago

All live closures A40 closure history