The M27 will be closed in both directions between Junctions 9 (Whiteley) and 11 (Fareham) from 8pm on 24 December 2025 until 4am on 4 January 2026.
A signed diversion will be in place along the A27 while Hampshire County Council and National Highways install a new four-lane underpass.
Find out more about the M27 road closure on Hampshire County Council’s website.