Fri 21:00 → Mon 06:00
Full weekend closure for bridge work
Follow the signed hollow-square diversion via the local A-road network.
Planned closures and overnight roadworks on the M3. For live incidents see M3 traffic.
Updated just now · refreshes every 5 min
Follow the signed hollow-square diversion via the local A-road network.
Resurfacing on the interchange slip. Signed diversion via the next junction.
One lane runs through the works each night this week.
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The M3 runs from the M25 at Thorpe down past Basingstoke and Winchester to the M27 for Southampton and the south coast. The smart-motorway section between J2 and J4a carries the heaviest flows, and summer Saturdays add south-coast holiday traffic to the usual commuter pattern. Live incidents, roadworks and closures refresh every 5 minutes.