M3 Junction 9 Emergency Closure - 16th December 2025

There is an emergency overnight closure planned to start from 9pm but this can change depending on the volume of traffic and when the contractors can close the lanes safely. The closure is expected to be for about 2 to 3 hours, depending on any issues faced on the night, which may impact the opening time.

Overnight closure:

• On 16 December we are closing the M3 southbound between junctions 8 and 9.
  • Diversion: M3 southbound junctions 8 and 9 diversion

Our diversion routes are designed to suit all vehicle types.

It is recommend that you not use a Satnav when following any of our diversions because there is a risk it could direct you down an unsuitable road or back onto our network when it is closed.