News & Features

M3 Junction 9 Improvements Project

Posted in News on Friday, March 6th, 2026

If you regularly travel around the M3 and A272 near Winchester, there are a few overnight closures coming up over the next few weeks that are worth being aware of. The works include carriageway management, surfacing, traffic management changes and vegetation maintenance.

Here’s a quick summary of what’s planned.

M3 Northbound Closure – 16 March 
On the night of Monday 16 March, the M3 northbound will be closed between Junction 10 and Junction 9.

Time: 9pm to 6am
Reason: Carriageway management
Diversion: Traffic will be diverted from M3 Junction 10 to Junction 9 northbound
This closure is scheduled overnight to minimise disruption during the day. www.google.com/maps 

A272 Overnight Closures – 20 March to 1 May
Starting Friday 20 March and running through to Friday 1 May, the A272 will be closed overnight in both directions for several improvement works.

Time: 8pm to 6am
Dates: Weeknights only (excluding weekends)
Exception: Works will also take place on Saturday 25 April
No closure during: Bank holiday weekend, 3–6 April

The works will include:

Road surfacing
Construction of the A272 gyratory island
Vegetation management
Diversion: Via the A272 Spitfire Link diversion route for both northbound and southbound traffic. www.google.com/maps 
Additional Closure – 28 March

There will also be an overnight closure on 28 March affecting:

A272 southbound
M3 southbound exit slip road
Time: 8pm to 6am
Reason: Traffic management switch
Diversion: Signed routes for the M3 southbound exit slip and A272 southbound. www.google.com/maps 
Following the Diversions

The diversion routes have been designed to accommodate all vehicle types. Drivers are advised not to rely on Satnav while following the diversion routes, as some navigation systems may try to redirect you onto unsuitable roads or back towards the closed sections.

As always with roadworks, plans can change at short notice, so it’s a good idea to check the latest updates before travelling.

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