Crash View

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
Hover or tap markers for full details

M4 roadworks in force now

M4 eastbound lane 1 closure (46/8 to 45/0)

Active Roadworks National Highways
Windsor And Maidenhead M4 · M4 Eastbound Between J10 And J8

Expected to clear in 4 hours 19 minutes

Started 13 Oct 2026, 19:44 Expected clear 14 Oct 2026, 05:00

M4 eastbound lane 1 closure (46/8 to 45/0)

Category: Road Maintenance
View update

M4 closures planned this week

M4 eastbound Jct 18 to 17 lane closure (166/5 to 162/1)

Planned Roadworks National Highways
South Gloucestershire M4 · M4 Eastbound Between J18 And J17

Starts in 5 hours 19 minutes

Starts 14 Oct 2026, 06:00 Expected clear 14 Oct 2026, 17:00

M4 eastbound Jct 18 to 17 lane closure (166/5 to 162/1)

Category: Road Maintenance
View update

M4 eastbound Jct 18 between exit and entry slip road carriageway closure

Planned Roadworks National Highways
South Gloucestershire M4 · M4 Eastbound Between J18 And J17

Starts in 18 hours 19 minutes

Starts 14 Oct 2026, 19:00 Expected clear 15 Oct 2026, 05:00

M4 eastbound Jct 18 between exit and entry slip road carriageway closure

Category: Road Maintenance
View update

M4 eastbound lane 1 and 2 closure (40/9 to 39/9)

Planned Roadworks National Highways
Slough M4 · M4 Eastbound Within J7

Starts in 18 hours 19 minutes

Starts 14 Oct 2026, 19:00 Expected clear 15 Oct 2026, 05:00

M4 eastbound lane 1 and 2 closure (40/9 to 39/9)

Category: Road Maintenance
View update

M4 eastbound lane 1 and 2 closure (51/5 to 50/6)

Planned Roadworks National Highways
Bracknell Forest M4 · M4 Eastbound Between J10 And J8

Starts in 18 hours 19 minutes

Starts 14 Oct 2026, 19:00 Expected clear 15 Oct 2026, 05:00

M4 eastbound lane 1 and 2 closure (51/5 to 50/6)

Category: Road Maintenance
View update

M4 eastbound lane 4 closure (69/4 to 64/9)

Planned Roadworks National Highways
Reading M4 · M4 Eastbound Between J12 And J11

Starts in 18 hours 19 minutes

Starts 14 Oct 2026, 19:00 Expected clear 15 Oct 2026, 05:00

M4 eastbound lane 4 closure (69/4 to 64/9)

Category: Road Maintenance
View update

M4 Eastbound Jct 3 to Jct 2 lane 1 closure

Planned Roadworks National Highways
Hounslow M4 · M4 Eastbound Between J3 And J2

Starts in 20 hours 19 minutes

Starts 14 Oct 2026, 21:00 Expected clear 15 Oct 2026, 04:30

M4 Eastbound Jct 3 to Jct 2 lane 1 closure

Category: Construction Work
View update

Recently cleared on the M4

All live closures M4 closure history