Severe
Westbound
The M4 westbound between junctions J15 and J16
🔨 Roadworks
🚦 1 of 3 lanes closed
Severe
Northbound 🛑 now
M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed
Overall Scheme Details: M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closure for structure maintenance.
Diversion: Diversion via M5 southbound, exit Jct 16 to turn and return M5 northbound.
✅ until 06:00 Sat 5 Dec
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
Severe
Westbound Starting soon
The M4 westbound between junctions J19 and J20
🔨 Roadworks
✅ The event is expected to clear between 06:00 and 06:00 on 5 December 2026
Severe
Westbound Starting soon
The M4 westbound at junction J5
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 05:30 and 05:30 on 19 October 2026
Severe
Westbound Starting soon
The M4 westbound between junctions J4B and J5
🔨 Roadworks
🚦 1 of 1 lanes closed ✅ The event is expected to clear between 05:30 and 05:30 on 19 October 2026
Severe
Westbound Starting soon
The M4 westbound at junction J4B
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 05:30 and 05:30 on 19 October 2026
Severe
Westbound Starting soon
The M4 westbound entry slip at junction J4B
🔨 Roadworks
🚦 1 of 1 lanes closed ✅ The event is expected to clear between 05:30 and 05:30 on 19 October 2026
Severe
Eastbound Starting soon
The M4 eastbound between junctions J19 and J18
🔨 Roadworks
🚦 1 of 4 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 20 October 2026
Severe
Eastbound Starting soon 🌙 tonight
M4 eastbound Jct 8/9 roundabout partial carriageway closure
Overall Scheme Details: M4 westbound Jct 8/9
Slip and lane closure for technology works
✅ until 06:00 Tue 13 Oct
Severe
Eastbound Starting soon 🌙 tomorrow night
M4 eastbound Jct 18 between exit and entry slip road carriageway closure
Overall Scheme Details: M4 eastbound Jct 18 between exit and entry slip roads - carriageway closure for resurfacing
Diversion: Diversion via exit and entry slip roads
✅ until 06:00 Wed 14 Oct
Severe
Westbound Starting soon 🌙 tomorrow night
M4 Westbound Jct 16 to 17 carriageway closure
Overall Scheme Details: M4 Westbound Jct 16 to 17 carriageway closure for carriageway reconstruction.
Diversion: Diversion via A3102, A4 and A350.
✅ until 06:00 Wed 14 Oct
Moderate
Westbound Starting soon 🌙 tonight
M4 westbound Jct 13 exit slip road closure
Overall Scheme Details: M4 westbound Jct 13 - slip road and lane closure for drainage works.
✅ until 06:00 Tue 13 Oct
Moderate
Westbound Starting soon 🌙 tonight
M4 westbound Jct 13 entry slip road closure
Overall Scheme Details: M4 westbound Jct 13 - slip road and lane closure for drainage works.
✅ until 06:00 Tue 13 Oct
Moderate
Westbound Starting soon 🌙 tonight
M4 westbound Jct 8/9 exit slip road closure
Overall Scheme Details: M4 westbound Jct 8/9
Slip and lane closure for technology works
✅ until 06:00 Tue 13 Oct
Moderate
Eastbound Starting soon 🌙 tonight
M4 Eastbound Jct 2 exit slip road closure
Overall Scheme Details: M4 Eastbound Jct 3 to Jct 2
Slip road and lane closure for concrete work
Diversion: Diversion via Local Authority and National highway network
✅ until 05:30 Tue 13 Oct
Moderate
Eastbound Starting soon 🌙 tomorrow night
M4 eastbound Jct 8/9 exit slip road closure
Overall Scheme Details: M4 eastbound Jct 8/9 - slip road and lane closure for technology work.
✅ until 06:00 Wed 14 Oct
❓ M4 roadworks — Frequently Asked Questions
Are there roadworks on the M4 right now?
Yes — National Highways is reporting 3 sets of roadworks running on the M4, 2 of them causing severe delays.
Is the M4 closed tonight?
14 closures are scheduled on the M4 in the next 72 hours. Each one is listed above with its window and diversion.
When are M4 roadworks usually carried out?
Most National Highways lane closures on the M4 run overnight and are lifted before the morning peak (07:00–09:30). Full carriageway closures are usually weekend nights, with a signed diversion.
🛣️ Data from National Highways ·
All UK roadworks ·
Overnight closures ·
M4 live traffic
Roadworks change at short notice. Always follow signs and signals on the road.