Is the M4 closed? Quick answers
Checked 13:58 on Tuesday 3 November 2026.
Is the M4 closed tonight?
Yes. The M4 has 2 full closures planned tonight (Tue 3 Nov, 18:00 to 06:00): eastbound Jct 18 to Jct 17 carriageway closure (170/6 to 155/2), 21:00 to 06:00; and Westbound Jct 1 to 3 carriageway closure, 22:00 to 05:30. Plus 6 lane or slip road closures. Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
Tonight's M4 closures ›Is the M4 closed this weekend?
Yes. The M4 has 1 full closure planned this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00): eastbound Jct 18 to Jct 17 carriageway closure (170/6 to 155/2), Fri 21:00 to 06:00. Plus 7 lane or slip road closures. Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
This weekend's M4 closures ›Are there roadworks on the M4 right now?
Yes. 2 sets of works are running on the M4 at 13:58.
Works running now ›From National Highways' closure report and live feed. Full closure means the carriageway is shut; lane and slip road closures leave it open. Times can change, so check before you set off.
M4 closures tonightTue 3 Nov, 18:00 to 06:00
Yes. The M4 has 2 full closures planned tonight (Tue 3 Nov, 18:00 to 06:00): eastbound Jct 18 to Jct 17 carriageway closure (170/6 to 155/2), 21:00 to 06:00; and Westbound Jct 1 to 3 carriageway closure, 22:00 to 05:30. Plus 6 lane or slip road closures. Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
Full closureEastbound21:00 to 06:00
Jct 18 to Jct 17 carriageway closure (170/6 to 155/2)
Overall Scheme Details: M4 eastbound Jct 18 to Jct 17 - carriageway closure for drainage scheme.
Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
Full closureWestbound22:00 to 05:30
Jct 1 to 3 carriageway closure
Overall Scheme Details: M4 Westbound Jct 1 to 3
Carriageway closure for surveys
Diversion: Diversion via Local Authorities and National Highways Network
Slip road closureNorthboundSince Sun 11 Oct 22:00, until Sat 5 Dec 06:00
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.
Slip road closureWestboundSince Sun 11 Oct 22:00, until Sat 5 Dec 06:00
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.
Slip road closureEastbound21:00 to 06:00
Membury Services exit slip road closure
Overall Scheme Details: M4 both directions Jct 14 to 15
Slip and lane closures for survey works
Slip road closureEastbound21:00 to 06:00
Membury Services entry slip road closure
Overall Scheme Details: M4 both directions Jct 14 to 15
Slip and lane closures for survey works
Slip road closureWestbound21:00 to 06:00
Jct 12 exit slip road closure
Overall Scheme Details: M4 westbound Jct 12 - slip road and lane closure for drainage works.
Slip road closureWestbound21:00 to 06:00
Jct 12 entry slip road closure
Overall Scheme Details: M4 westbound Jct 12 - slip road and lane closure for drainage works.
M4 closures this weekendFri 6 Nov 18:00 to Mon 9 Nov 06:00
Yes. The M4 has 1 full closure planned this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00): eastbound Jct 18 to Jct 17 carriageway closure (170/6 to 155/2), Fri 21:00 to 06:00. Plus 7 lane or slip road closures. Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
Full closureEastboundFri 6 Nov, 21:00 to 06:00
Jct 18 to Jct 17 carriageway closure (170/6 to 155/2)
Overall Scheme Details: M4 eastbound Jct 18 to Jct 17 - carriageway closure for drainage scheme.
Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
Slip road closureNorthboundSince Sun 11 Oct 22:00, until Sat 5 Dec 06:00
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.
Slip road closureWestboundSince Sun 11 Oct 22:00, until Sat 5 Dec 06:00
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.
Slip road closureEastboundFri 6 Nov, 21:00 to 06:00
Jct 15 entry slip road closure
Overall Scheme Details: M4 both directions Jct 15 - slip road and lane closure for structures work
Slip road closureEastboundFri 6 Nov, 21:00 to 06:00
Jct 22 closed between exit and entry slip roads
Overall Scheme Details: M4 eastbound Jct 22 closed between exit and entry slip roads for structure maintenance.
Diversion: Diversion via exit and entry slip roads.
Slip road closureWestboundFri 6 Nov, 21:00 to 06:00
Jct 8/9 entry slip road closure
Overall Scheme Details: M4 both directions Jct 8/9 - slip road and lane closures for drainage works
Slip road closureWestboundFri 6 Nov, 21:00 to 06:00
Jct 8/9 exit slip road closure
Overall Scheme Details: M4 both directions Jct 8/9 - slip road and lane closures for drainage works
Slip road closureWestboundFri 6 Nov, 21:00 to 06:00
Jct 19 entry slip road closed
Overall Scheme Details: M32 northbound Jct 1 entry slip road closed and M4 westbound Jct 19 entry slip road closed for electrical works.
Diversion: Diversion via A4174, A38, M5
M4 roadworks running now
Moderate
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
Moderate
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
Eastbound Starting soon
The M4 eastbound between junctions J10 and J8
🔨 Roadworks
🚦 1 of 4 lanes closed ✅ The event is expected to clear around 06:00 on 4 November 2026
Severe
Starting soon
On the roundabout at junction with the M4 and M5
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear around 06:00 on 4 November 2026
Severe
Eastbound Starting soon
The M4 eastbound between junctions J13 and J12
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear around 06:00 on 6 November 2026
Severe
Westbound Starting soon
The M4 westbound at junction J12
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear around 06:00 on 6 November 2026
Severe
Westbound Starting soon
The M4 westbound between junctions J12 and J13
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear around 06:00 on 6 November 2026
Severe
Eastbound Starting soon
The M4 eastbound between junctions J6 and J5
🔨 Roadworks
🚦 1 of 4 lanes closed ✅ The event is expected to clear around 05:30 on 4 November 2026
Severe
Eastbound Starting soon
The M4 eastbound between junctions J17 and J16
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear around 06:00 on 17 November 2026
Minor
Eastbound Starting soon
The M4 eastbound between junctions J11 and J10
🔨 Roadworks
✅ The event is expected to clear around 16:00 on 3 November 2026
Minor
Westbound Starting soon
The M4 westbound between junctions J13 and J14
🔨 Roadworks
✅ The event is expected to clear around 16:00 on 10 November 2026
M4 closures in the next 2 weeksOther nights, as far ahead as National Highways have published (to Mon 9 Nov)
Wednesday 4 Nov night · 5 closures
Full closureEastbound21:00 to 06:00
Jct 18 to Jct 17 carriageway closure (170/6 to 155/2)
Overall Scheme Details: M4 eastbound Jct 18 to Jct 17 - carriageway closure for drainage scheme.
Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
Full closureWestbound21:00 to 06:00
Jct 15 to Jct 16 carriageway closure
Overall Scheme Details: M4 westbound Jct 15 to Jct 16 carriageway closure for horticultural works.
Diversion: Diversion via A419, A4259, A3102.
Full closureWestbound21:00 to 06:00
Jct 15 entry slip road carriageway closure
Overall Scheme Details: M4 westbound Jct 15 to Jct 16 carriageway closure for horticultural works.
Diversion: Diversion via A419, A4259, A3102.
Slip road closureWestbound21:00 to 06:00
Membury Services exit slip road closure
Overall Scheme Details: M4 both directions Jct 14 to 15
Slip and lane closures for survey works
Slip road closureWestbound21:00 to 06:00
Jct 11 exit slip road closure
Overall Scheme Details: M4 westbound Jct 11 - slip road and lane closure for maintenance work.
Thursday 5 Nov night · 6 closures
Full closureEastbound21:00 to 06:00
Jct 18 to Jct 17 carriageway closure (170/6 to 155/2)
Overall Scheme Details: M4 eastbound Jct 18 to Jct 17 - carriageway closure for drainage scheme.
Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
Slip road closureEastbound21:00 to 06:00
Jct 8/9 exit slip road closure
Overall Scheme Details: M4 both directions Jct 8/9 - slip road and lane closures for drainage works
Slip road closureEastbound21:00 to 06:00
Jct 8/9 entry slip road closure
Overall Scheme Details: M4 both directions Jct 8/9 - slip road and lane closures for drainage works
Slip road closureWestbound21:00 to 06:00
Membury Services exit slip road closure
Overall Scheme Details: M4 both directions Jct 14 to 15
Slip and lane closures for survey works
Slip road closureWestbound21:00 to 06:00
Jct 13 entry slip road closure
Overall Scheme Details: M4 westbound Jct 13 - slip road and lane closure for maintenance work
Slip road closureWestbound21:00 to 06:00
Jct 19 entry slip road closed
Overall Scheme Details: M32 northbound Jct 1 entry slip road closed and M4 westbound Jct 19 entry slip road closed for electrical works.
Diversion: Diversion via A4174, A38, M5
❓ 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.
Is the M4 closed tonight?
Yes. The M4 has 2 full closures planned tonight (Tue 3 Nov, 18:00 to 06:00): eastbound Jct 18 to Jct 17 carriageway closure (170/6 to 155/2), 21:00 to 06:00; and Westbound Jct 1 to 3 carriageway closure, 22:00 to 05:30. Plus 6 lane or slip road closures. Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
Is the M4 closed this weekend?
Yes. The M4 has 1 full closure planned this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00): eastbound Jct 18 to Jct 17 carriageway closure (170/6 to 155/2), Fri 21:00 to 06:00. Plus 7 lane or slip road closures. Diversion: Diversion via - A46 southbound, A420 eastbound, A350 northbound and rejoin M4 at Jct 17.
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.
UK Traffic Updates