M3 junction 9 improvements project update - 11/09

The project's next phase will be to move all vehicles into a contraflow system on the M3 southbound so the contractors can carry out major works for the new A34 underpass. The contractors plan to switch the traffic management (safety barriers and signage including temporary speed limit signs) overnight when traffic flows are at their lowest.

See M3 Junction 9 Improvement - Headbourne Worthy Parish Council - Headbourne Worthy Parish Council, Headbourne Worthy, Winchester for information regarding the vegitation clearance part of this project.

Please note overnight on Monday 15 and Tuesday 16 September the contractors are combining works and overnight closures with their colleagues working on road improvements along the A30, between the A303 and the A34 during September. Whilst it is appreciated this is a lengthy closure and diversions, it will minimise the overall disruption and need for separate overnight closures..

Overnight closures September 2025 to October 2025

Closures

• On Thursday 11 September we are closing the M3 northbound between junctions 9 and 8. - Repair damaged crash cushion
  • Diversion: M3 northbound junctions 9 and 8 diversion
• Overnight on Monday 15 and Tuesday 16 September the A34 southbound at Bullington Cross to the M3 junction 9 will be closed (8pm to 6am) - Vegetation clearance and road improvement on the A30, between the A303 and the A34.

This closure will include several slip and linking roads around the Bulling Cross junction the diversion routes are listed below and included on our diversion map link.

• • A34 northbound exit slips at Bullington Cross – A303 east: A34 to Tufton turn around and re-enter the A34 southbound to Bullington to A303 westbound to Barton Stacey to A303 eastbound.
  • A303 eastbound exit slip road - A34 northbound: A303 eastbound to M3 junction 7, turnaround at junction 7 and head southbound to junction 9, exit and join A34 northbound to Bullington Cross.
  • Bullington Cross to junction 9 closure (A34 southbound to junction 9): Bulling Cross to A303 westbound to Barton Stacey to A303 eastbound to M3 junction 7, turnaround at junction 7 and head southbound to junction 9 (to reach Three Maids join A34 northbound).
  • Diversion map link: A34/A33 southbound diversion
• Overnight on Wednesday 17 September we are closing the M3 northbound between junctions 9 and 8 (9pm to 6am) – Traffic Management switch and Vegetation clearance
  • Diversion: M3 northbound junctions 9 and 8 diversion
• Overnight on Thursday 18 and Friday 19 September we are closing the M3 southbound between junctions 8 and 9 (9pm to 6am) - Traffic Management switch and Vegetation clearance
  • Diversion: M3 northbound junctions 8 and 9 diversion
• Overnight on Monday 22 and Tuesday 23 September we are closing the A272 Spitfire carriageway both northbound and southbound (9pm to 6am) - Vegetation clearance
  • Diversion: A272 Spitfire Link closure northbound and southbound diversion
• Overnight on Friday 26, Saturday 27, Sunday 28, and Monday 29 September we are closing the M3 junction 9 southbound entry slip road (9pm to 6am) - Vegetation clearance
  • Diversion: M3 southbound entry slip road diversion
• Overnight on Monday 20, Tuesday 21, Wednesday 22, and Thursday 23 October we are closing the M3 junction 9 northbound exit slip road (9pm to 6am) - Vegetation clearance
  • Diversion: M3 northbound exit slip road diversion
• Overnight on Monday 27 and Tuesday 28 October we are closing the M3 northbound between junctions 9 and 8 (9pm to 6am) - Vegetation clearance
  • Diversion: M3 northbound junctions 9 and 8 diversion