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

Hover or tap markers for full details

M4 roadworks in force now

M4 eastbound lane 1 and lane 2 closure ( 50/6 to 49/5)

Active Roadworks National Highways

Windsor And Maidenhead M4 · M4 Eastbound Between J10 And J8

Expected to clear in 7 hours 28 minutes

Started 4 Aug 2026, 19:47 Expected clear 5 Aug 2026, 05:00

M4 eastbound lane 1 and lane 2 closure ( 50/6 to 49/5)

Category: Road Maintenance

View update

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

Expected to clear in 7 hours 28 minutes

Started 4 Aug 2026, 19:00 Expected clear 5 Aug 2026, 05:00

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

Category: Road Maintenance

View update

M4 eastbound lane 1 closure (99/4 to 98/7)

Active Roadworks National Highways

West Berkshire M4 · M4 Eastbound Between J14 And J13

Expected to clear in 7 hours 28 minutes

Started 4 Aug 2026, 18:53 Expected clear 5 Aug 2026, 05:00

M4 eastbound lane 1 closure (99/4 to 98/7)

Category: Road Maintenance

View update

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 28 minutes

Started 4 Aug 2026, 18:47 Expected clear 5 Aug 2026, 05:00

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

Category: Road Maintenance

View update

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 28 minutes

Started 4 Aug 2026, 18:44 Expected clear 5 Aug 2026, 05:00

M4 eastbound lanes 1 and 2 closed

Category: Construction Work

View update

Recently cleared on the M4

All live closures M4 closure history