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Live from National Highways

M3 roadworks and closures

Closures tonight, this weekend and the next two weeks, plus the works running now on the M3, straight from National Highways.

1Running now
1Full closures tonight 2Full closures this weekend
Home › Traffic › Roads › M3 › Roadworks & closures

Is the M3 closed? Quick answers

Checked 13:58 on Tuesday 3 November 2026.

Is the M3 closed tonight?

Yes. The M3 has 1 full closure planned tonight (Tue 3 Nov, 18:00 to 06:00): southbound Jct 8 to Jct 9 carriageway closure, 21:00 to 06:00. Plus 1 lane or slip road closure.

Tonight's M3 closures ›

Is the M3 closed this weekend?

Yes. The M3 has 2 full closures planned this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00): northbound Jct 9 to Jct 8 carriageway closure, from Fri 6 Nov 21:00, until Mon 9 Nov 06:00; and southbound Jct 8 to Jct 9 carriageway closure, from Fri 6 Nov 21:00, until Mon 9 Nov 06:00. Plus 3 lane or slip road closures.

This weekend's M3 closures ›

Are there roadworks on the M3 right now?

Yes. 1 set of works is running on the M3 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.

M3 closures tonightTue 3 Nov, 18:00 to 06:00

Yes. The M3 has 1 full closure planned tonight (Tue 3 Nov, 18:00 to 06:00): southbound Jct 8 to Jct 9 carriageway closure, 21:00 to 06:00. Plus 1 lane or slip road closure.

  • Full closureSouthbound21:00 to 06:00
    Jct 8 to Jct 9 carriageway closure
    Overall Scheme Details: M3 southbound Jct 8 to Jct 9 - carriageway closure for horticulture (cutting and planting)
  • Slip road closureNorthboundSince Mon 3 Aug 06:00, until Mon 1 Nov 06:00
    Jct 9 entry slip road closure
    Overall Scheme Details: M3 and A34 both directions Jct 9. Narrow lanes and 24/7 lane closure for major improvement work.

M3 closures this weekendFri 6 Nov 18:00 to Mon 9 Nov 06:00

Yes. The M3 has 2 full closures planned this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00): northbound Jct 9 to Jct 8 carriageway closure, from Fri 6 Nov 21:00, until Mon 9 Nov 06:00; and southbound Jct 8 to Jct 9 carriageway closure, from Fri 6 Nov 21:00, until Mon 9 Nov 06:00. Plus 3 lane or slip road closures.

  • Full closureNorthboundFrom Fri 6 Nov 21:00, until Mon 9 Nov 06:00
    Jct 9 to Jct 8 carriageway closure
    Overall Scheme Details: M3 both directions Jct 8 to Jct 11 and A34 both directions Three Maids Hill to M3 Jct 9. Carriageway, slip road and lane closures for major improvement work.
  • Full closureSouthboundFrom Fri 6 Nov 21:00, until Mon 9 Nov 06:00
    Jct 8 to Jct 9 carriageway closure
    Overall Scheme Details: M3 both directions Jct 8 to Jct 11 and A34 both directions Three Maids Hill to M3 Jct 9. Carriageway, slip road and lane closures for major improvement work.
  • Slip road closureNorthboundSince Mon 3 Aug 06:00, until Mon 1 Nov 06:00
    Jct 9 entry slip road closure
    Overall Scheme Details: M3 and A34 both directions Jct 9. Narrow lanes and 24/7 lane closure for major improvement work.
  • Slip road closureSouthboundSun 8 Nov, 21:00 to 06:00
    Jct 4a exit slip road closure
    Overall Scheme Details: M3 southbound Jct 4a - slip road and lane closure for maintenance work
  • Slip road closureSouthboundSun 8 Nov, 21:00 to 06:00
    Jct 4a entry slip road closure
    Overall Scheme Details: M3 southbound Jct 4a - slip road and lane closure for maintenance work

M3 roadworks running now

Moderate Northbound 🛑 now
M3 northbound Jct 9 entry slip road closure
Overall Scheme Details: M3 and A34 both directions Jct 9. Narrow lanes and 24/7 lane closure for major improvement work.
✅ until 06:00 Mon 1 Nov
Severe Westbound Starting soon
The M3 westbound between junctions J5 and J6
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear around 06:00 on 5 November 2026
Severe Eastbound Starting soon
The M3 eastbound between junctions J6 and J5
🔨 Roadworks
🚦 1 of 3 lanes closed ✅ The event is expected to clear around 06:00 on 5 November 2026

M3 closures in the next 2 weeksOther nights, as far ahead as National Highways have published (to Mon 9 Nov)

Wednesday 4 Nov night · 1 closure

  • Full closureWestbound22:00 to 05:30
    Jct 2 carriageway closure between exit and entry slip roads
    Overall Scheme Details: M3 Westbound Jct 2 between the slip roads Carriageway closure for routine maintenance works,
    Diversion: Diversion via Local Authority and National Highway network

Thursday 5 Nov night · 2 closures

  • Full closureNorthbound21:00 to 06:00
    Jct 10 to Jct 8 carriageway closure
    Overall Scheme Details: M3 both directions Jct 8 to Jct 11 and A34 both directions Three Maids Hill to M3 Jct 9. Carriageway, slip road and lane closures for major improvement work.
  • Full closureSouthbound21:00 to 06:00
    Jct 8 to Jct 9 carriageway closure
    Overall Scheme Details: M3 southbound Jct 8 to Jct 9 - carriageway closure for horticulture (cutting and planting)

❓ M3 roadworks — Frequently Asked Questions

Are there roadworks on the M3 right now?

Yes — National Highways is reporting 1 set of roadworks running on the M3.

Is the M3 closed tonight?

Yes. The M3 has 1 full closure planned tonight (Tue 3 Nov, 18:00 to 06:00): southbound Jct 8 to Jct 9 carriageway closure, 21:00 to 06:00. Plus 1 lane or slip road closure.

Is the M3 closed this weekend?

Yes. The M3 has 2 full closures planned this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00): northbound Jct 9 to Jct 8 carriageway closure, from Fri 6 Nov 21:00, until Mon 9 Nov 06:00; and southbound Jct 8 to Jct 9 carriageway closure, from Fri 6 Nov 21:00, until Mon 9 Nov 06:00. Plus 3 lane or slip road closures.

When are M3 roadworks usually carried out?

Most National Highways lane closures on the M3 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 · M3 live traffic
Roadworks change at short notice. Always follow signs and signals on the road.

🚗 M3 pages

M3 live traffic →

M3 Motorway · 52 miles. Live incidents, junction status and collision history.

🔢 M3 junctions

J1 J2 J3 J4 J4A J5 J6 J7 J8 J9 J10 J11 J12 J13 J14

🚧 Roadworks elsewhere

🇬🇧 All UK roadworks → 🌙 Motorway closures tonight & this weekend → 🚧 M25 roadworks → 🚧 M27 roadworks → 🚧 A34 roadworks →

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