M3 Closure: Diversion Routes for Emergency Bridge Repairs (2026)

An urgent bridge repair operation has led to the full closure of the M3, causing significant disruptions for commuters. This is a breaking story that will have many drivers on edge.

Our partners at USA Today have provided us with the latest updates, and we want to ensure our readers are well-informed.

The M3 Closure and Diversion Route

National Highways announced the emergency works just after 10:30 a.m. on Monday, January 19th. The closure affects the stretch between Junctions 13 and 14 due to an unexpected infrastructure defect. Initially, only three lanes southbound were closed, but the situation escalated quickly.

Full Closure and Diversion

By 3 p.m., National Highways confirmed the entire carriageway would be closed. This unexpected development has led to the implementation of a diversion route for approaching traffic.

Diversion Route Details

For those approaching the closure, follow the solid triangle symbol on road signs:

  • Exit the M3 at J12 and take the second exit at the roundabout onto Allbrook Way.
  • At the next roundabout, take the second exit onto Twyford Road.
  • At the subsequent roundabout, take the third exit onto Romsey Road/Leigh Road.
  • Continue to rejoin the M3 at J13.

Repairs and Impact

A spokesperson for National Highways stated, "Specialist service providers are on-site, working diligently to complete the necessary repairs." They also advised drivers to plan ahead, suggesting they consider alternative routes or even delaying their journeys to avoid potential delays.

And here's where it gets controversial...

Some commuters might argue that these emergency repairs could have been foreseen and planned for, minimizing the impact on their daily commute. What do you think? Should infrastructure maintenance be a higher priority to avoid such disruptions? We'd love to hear your thoughts in the comments below!

M3 Closure: Diversion Routes for Emergency Bridge Repairs (2026)
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