Why was the M27 closed near Junction 10?

The closure allowed engineers to slide a new underpass into position using a box slide method beside the live carriageway. This approach shortens the time the motorway needs to be shut, supports safety for crews, and prepares future access to Welborne Garden Village without lengthy, disruptive on-site excavation.

Are speed limits still in place after reopening?

Yes. All lanes have reopened, but a 50mph speed limit and some lane restrictions remain while teams complete works and checks. Drivers should follow on-road signs and plan for slightly longer travel times during peak periods until full-speed running is confirmed by National Highways.

What does this mean for Welborne Garden Village timelines?

Improved access at Junction 10 reduces schedule uncertainty for site logistics, utilities connections, and phased build-out. Developers can plan labour, materials deliveries, and plot releases with more confidence, which can support sales pacing and infrastructure delivery as the wider housing and community facilities programme advances.

What should investors monitor next?

Watch for updates on remaining phases at Junction 10, any changes to temporary traffic management, and confirmation of when full-speed running resumes. Also review contractor progress reports and council notices. These signals will indicate residual disruption risk and whether project cost and time targets continue to hold.

Global Market Insights

January 03: M27 Reopens Early — Box Slide Cuts Disruption, Aids Housing

ByHuzaifa Zahoor January 3, 2026January 3, 2026

The early end to m27 closures on 3 January signals smoother travel for South Hampshire. National Highways reopened the M27 24 hours ahead of schedule after sliding a £100m box slide underpass into place at M27 Junction 10, improving future access to Welborne Garden Village. Lanes are open with a 50mph limit and traffic management still in force. For investors, faster delivery reduces disruption risk, supports housing delivery, and keeps local logistics and commuter flows on track. The early finish also signals better execution on complex UK infrastructure.