M3 at Basingstoke closed this weekend
National Highways say it's for improvement work
Last updated 4th Apr 2025
The M3 will be closed near Basingstoke this weekend while improvement work takes place.
For safety, the M3 will be fully closed between junction 6 Black Dam and junction 7 Dummer interchanges from 9pm Friday, 4 April until 6am on Monday, 7 April, due to electrical installation work.
Patience
National Highways Project Manager, Edgar Vila Pouca, said:
“I would like to thank motorists in advance for their patience and would urge anyone planning on travelling to allow extra time to complete their journey. A signed diversion route will be in place, but it is likely to be busy, especially with nice weather forecast for the weekend and for many the start of the Easter school break.
“This work is part of our upgrade to this section of the M3. The tech being installed means that we can use a sign on the southbound carriageway between the Black Dam and Dummer interchanges to inform road users about any congestion, incidents or planned closures ahead.”
Diversion
The diversion route will be:
M3 junction 6 spur road
A30 Ringway South
A30 Winchester Road