Road Users Advised to Plan Ahead During M3 Overnight Closures

Residents are advised to allow extra time for journeys over the coming weeks as a series of overnight closures on the M3 and M3 Junction 9 take place as part of ongoing improvement works.

With the school summer holidays beginning, traffic levels are expected to increase, so motorists are encouraged to plan ahead, allow extra travel time and follow the signed diversion routes rather than satellite navigation during the closures.

Planned Overnight Closures

Emergency Closure
Friday 17 July (overnight)
M3 Southbound – Junction 8 to Junction 9
8.00 pm – 6.00 am

Crash barrier replacement works.

Diversion: Please switch off your satnav and follow the signed diversion route from M3 Junction 8 to Junction 9 southbound.

Thursday 17 July to Wednesday 30 July

(Weeknights only – excluding weekends)
M3 Northbound – Junction 10 to Junction 9
8.00 pm – 6.00 am

Carriageway management works.

Diversion: Follow the signed diversion from M3 Junction 10 to Junction 9 northbound.

Monday 21 July to Friday 25 July

Tuesday 5 August to Friday 8 August

Sections of the M3 Junction 9 Roundabout
(between the A34 northbound and southbound carriageways)
8.00 pm – 6.00 am

Traffic management layout changes.

Diversion: Follow the signed diversion route around the M3 Junction 9 roundabout.

Thursday 31 July (overnight)

M3 Southbound – Junction 8 to Junction 9
8.00 pm – 6.00 am

Removal of temporary vehicle restraint barriers.

Diversion: Please switch off your satnav and follow the signed diversion from M3 Junction 8 to Junction 9 southbound.