M3, A34, A33 closures for November and December
Overnight closures of the M3 southbound exit at Junction 9, A34 & A33 southbound, and the M3 northbound between Junctions 10 and 8
Published: 11 November 2026
- Overnight from Wednesday 11 until Friday 27 November (excluding Saturdays and Sundays) (8pm to 6am) the M3 southbound exit slip road at Junction 9 will be closed for planting works
- Switch off satnav and follow signed diversion: M3 southbound exit slip road diversion
- Overnight on Thursday 3 and Friday 4 December the A34 at Three Maids Hill southbound and the A33 southbound from the Cart and Horse junction will be closed for Traffic Management works
- Switch off satnav and follow signed diversion: A34/A33 southbound diversions
- Overnight from Monday 7 December until Saturday 12 December the M3 northbound between junctions 10 and 8 (8pm to 6am) will be closed for surfacing works on the northbound exit slip road at Junction 9
- Diversion: M3 junction 10 to 8 northbound diversion
**Dates may be subject to change**
Please ensure the signed diversion routes are followed, allow extra time and avoid unsuitable local roads.
Long-distance and freight traffic should use an alternative better suited route i.e. A37 to A30 to A34 or A3 to the M25, we ask these are incorporated into route planning.
The diversion routes are designed to suit all vehicle types.
You are advised not to use a Satnav when following any of the diversions because there is a risk it could direct you down an unsuitable road or back onto our network when it is closed.
Please remember that closures can change at short notice. You can check the latest information on the daily closures page or find live travel information on Traffic England. The travel alerts give details of live incidents on the network.
Updates are also posted on the south east X and Facebook social media accounts which you can share.
Please note lane closure information is not usually provided on the project website or closure bulletins.
In the event of poor weather conditions or other issues out of our control, planned work may be postponed at short notice.
National Highways customer contact centre
0300 123 5000