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
Severe
Westbound 🛑 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
Severe
Eastbound Starting soon
The M4 eastbound between junctions J16 and J15
🔨 Roadworks
✅ The event is expected to clear between 18:00 and 18:00 on 21 October 2026
Severe
Westbound Starting soon
The M4 westbound between junctions J15 and J16
🔨 Roadworks
✅ The event is expected to clear between 18:00 and 18:00 on 21 October 2026
Severe
Westbound Starting soon
The M4 westbound between junctions J17 and J18
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 15:00 and 15:00 on 14 October 2026
Severe
Eastbound Starting soon
The M4 eastbound at junction J13
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 17 October 2026
Severe
Westbound Starting soon
The M4 westbound at junction J13
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 17 October 2026
Severe
Eastbound Starting soon
The M4 eastbound entry slip at junction J13
🔨 Roadworks
🚦 1 of 2 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 18 October 2026
Severe
Eastbound Starting soon
The M4 eastbound between junctions J18 and J17
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 18:00 and 18:00 on 14 October 2026
Severe
Eastbound Starting soon
The M4 eastbound at junction J18
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear between 06:00 and 06:00 on 16 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 16 October 2026
Severe
Eastbound Starting soon 🌙 tonight
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 Thu 15 Oct
Severe
Westbound Starting soon 🌙 tomorrow night
M4 westbound Jct 19 to Jct 20 carriageway closure
Overall Scheme Details: M4 westbound Jct 19 to Jct 20 carriageway closure carriageway reconstruction.
Diversion: Diversion via M32 Jct 1, A4174, A38, M5
✅ until 06:00 Fri 16 Oct
Severe
Eastbound Starting soon 🌙 Fri 16 Oct
M4 eastbound Jct 13 between the slips carriageway closure
Overall Scheme Details: M4 eastbound Jct 13 - carriageway closure for resurfacing work.
✅ until 06:00 Sat 17 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 Thu 15 Oct
Moderate
Eastbound Starting soon 🌙 tomorrow night
M4 eastbound Jct 17 entry slip closure
Overall Scheme Details: M4 eastbound Jct 17 entry slip road closure, for barrier repairs
Diversion: Diversion to Jct 18 and return
✅ until 06:00 Fri 16 Oct
Moderate
Westbound Starting soon 🌙 tomorrow night
M4 westbound Jct 10 exit slip road closure
Overall Scheme Details: M4 westbound Jct 10 - slip road and lane closure for maintenance work.
✅ until 06:00 Fri 16 Oct
Moderate
Southbound Starting soon 🌙 tomorrow night
M4 eastbound Jct 10 entry slip road closure (from A329M southbound)
Overall Scheme Details: M4 eastbound Jct 10 - slip road closure for maintenance work
✅ until 06:00 Fri 16 Oct
Moderate
Westbound Starting soon 🌙 tomorrow night
M4 westbound Jct 19 entry slip road closed
Overall Scheme Details: M4 westbound Jct 19 to Jct 20 carriageway closure carriageway reconstruction.
Diversion: Diversion via M32 Jct 1, A4174, A38, M5
✅ until 06:00 Fri 16 Oct
Moderate
Both directions Starting soon 🌙 tomorrow night
M4 Eastbound and Westbound Jct 4B to M25 Clockwise Jct 15 link road closure
Overall Scheme Details: M4 Eastbound and Westbound Jct 4B to M25 Clockwise Jct 15
Lane and link road closure for urgent safety fence repairs
Diversion: Diversion via National Highways Network
✅ until 05:30 Fri 16 Oct
❓ M4 roadworks — Frequently Asked Questions
Are there roadworks on the M4 right now?
Yes — National Highways is reporting 2 sets of roadworks running on the M4, 2 of them causing severe delays.
Is the M4 closed tonight?
18 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.