M4 road closures today & tonight
Updated . The live feeds are checked every five minutes.
No live closures are reported on the M4 right now.
8 closures are scheduled tonight (18:00 to 06:00).
Is the M4 closed? Live updates from National Highways and Traffic Wales: accidents and emergency closures happening today, overnight closures tonight, roadworks in force and planned closures for the week ahead, filterable by direction.
Filter M4 closures by direction
M4 closures tonight
Closures starting between 18:00 on Thursday 15 October and 06:00 the next morning (UK time), including any already in force.
- – 06:00 M4 eastbound lane 1 and 2 closure (47/0 to 44/7) Eastbound · J8 · 2 of 2 lanes affected Planned
- – 06:00 Lane closure Westbound · J16 to J17 · 1 of 3 lanes affected Planned
- – 06:00 M4 eastbound lane 4 closure (69/6 to 64/9) Eastbound · J10 to J11 · Lane 4 closed, 1 of 3 lanes affected Planned
- – 06:00 M4 eastbound lane 4 closure (69/4 to 64/9) Eastbound · J11 to J12 · Lane 4 closed, 1 of 3 lanes affected Planned
- – 06:00 M4 eastbound Jct 18 between exit and entry slip road carriageway closure Eastbound · J17 to J18 Planned
- – 06:00 M4 eastbound Jct 17 to Jct 16 - lane closure Westbound · J16 to J17 Planned
- – 05:30 M4 Eastbound Jct 2 exit slip road closure Eastbound · J2 Eastbound Exit Planned
- – 05:30 M4 Eastbound Jct 3 to Jct 2 lane 1 closure Eastbound · J2 to J3 · 1 of 1 lanes affected Planned
No closures in this direction tonight.
Recently cleared on the M4
-
M4 eastbound Jct 18 to 17 lane closure (166/5 to 162/1)
ClearedCleared 1 hour 15 minutes ago
-
M4 eastbound Jct 18 to 17 lane closure (166/5 to 162/1)
ClearedCleared 11 hours 2 seconds ago
-
M4 eastbound lane 4 closure (69/6 to 64/9)
ClearedCleared 13 hours 15 minutes ago
-
M4 eastbound lane 1 and 2 closure (51/5 to 50/6)
ClearedCleared 17 hours 2 seconds ago
-
M4 Eastbound Jct 3 to Jct 2 lane 1 closure
ClearedCleared 17 hours 2 seconds ago
-
M4 eastbound lane 1 and 2 closure (40/9 to 39/9)
ClearedCleared 17 hours 10 minutes ago
-
M4 westbound Jct 16 - jct 17 lane 1 closure
ClearedCleared 17 hours 10 minutes ago
-
M4 eastbound lane 4 closure (69/4 to 64/9)
ClearedCleared 17 hours 45 minutes ago
-
M4 eastbound Jct 18 between exit and entry slip road carriageway closure
ClearedCleared 19 hours 15 minutes ago
-
M4 Eastbound Jct 2 exit slip road closure
ClearedCleared 20 hours 3 seconds ago
M4 closure history: the last 12 months
Since 15 October 2025, 2,260 closures have been recorded on the M4: 2,260 planned roadworks and 0 unplanned incidents. 93% started overnight (18:00 to 06:00), and a typical closure lasted 8 hours 45 minutes. The busiest stretch was J22 to J23 (178 closures), and Tuesday was the busiest day of the week.
- Roadworks & planned closures
- 2,260
- Unplanned incidents
- 0
- Started overnight
- 93%
- Typical duration
- 8 hours 45 minutes
- Average 8 hours 15 minutes
Busiest M4 sections
- J22 to J23 178
- J17 to J18 175
- J16 to J17 164
- J18 to J19 151
- J12 to J13 115
When closures happen
- Busiest day
- Tuesday
- Busiest month
- July 2026 (291)
- Overnight closures
- 2,099
Busiest months: July 2026 (291), August 2026 (265), September 2026 (230).
Closures by direction
- Eastbound
- 2,019
- Westbound
- 201
- Clockwise
- 40
M4 crash history
1,078 injury collisions were recorded on the M4 between 2020 and 2024: 42 fatal, 150 serious and 886 slight, involving 1,619 casualties. The Department for Transport publishes STATS19 once a year, so 2024 is the latest year available and today's crashes appear above as live incidents instead.
- Collisions
- 1,078
- Fatal
- 42
- Serious
- 150
- Slight
- 886
M4 closures: your questions answered
Is the M4 closed today?
No. As of 18:00 UK time there are no live closures or roadworks in force on the M4. The next planned closure is roadworks (eastbound, J8), starting Thu 15 Oct, 20:00.
Is the M4 closed tonight?
Yes, 8 closures on the M4 are scheduled to start between 18:00 on Thursday 15 October and 06:00 the next morning, including roadworks (eastbound, J8) from 20:00; roadworks (westbound, J16 to J17) from 20:00; roadworks (eastbound, J10 to J11) from 20:00.
Why is the M4 closed?
Current M4 closures are for maintenance work, sweeping of road, construction work. Over the last 12 months, 100% of the 2,260 closures recorded on the M4 were planned roadworks and none were unplanned incidents; 93% started overnight.
Where does this data come from?
Live M4 closures come from the National Highways road closure feed for England's motorways and major A roads and from Traffic Wales, checked every five minutes. Closure history is built from that feed's archive. Collision figures come from the Department for Transport's STATS19 road safety data, which is published once a year, so recent crashes appear here as live incidents long before they reach the official statistics.