M4 Severe
Eastbound
The M4 eastbound between junctions J20 and J19
🔨 Roadworks
🚦 1 of 2 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 12 October 2026
M4 Severe
Westbound
The M4 westbound between junctions J19 and J20
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 12 October 2026
M4 Severe
Westbound
The M4 westbound entry slip at junction J19
🔨 Roadworks
🚦 1 of 2 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 12 October 2026
M4 Severe
Westbound
The M4 westbound between junctions J18 and J19
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 12 October 2026
M4 Severe
Westbound
The M4 westbound between junctions J15 and J16
🔨 Roadworks
🚦 1 of 3 lanes closed
M4 Minor
Westbound
The M4 westbound exit slip at junction J20
🔨 Roadworks
✅ The event is expected to clear between 06:00 and 06:00 on 5 December 2026
🔔
Know before you set off
Early Warning tells you the moment the M4 starts backing up — so you leave earlier or take the other route.
Set up →
🛣️ Live roadworks data from National Highways ·
Motorways and major A-roads in England ·
Overnight closures ·
Live incidents ·
Live map
Roadworks change at short notice. Always follow signs and signals on the road.