Motorists in Portsmouth, Hampshire, should expect overnight travel disruption from the night of 5 February 2026 as National Highways carries out planned maintenance and technology works on the M27 and M275.
National Highways has authorised nightly closures to allow contractors to carry out essential maintenance and technology upgrades. The closures are scheduled to take place overnight between 9:00 PM and 6:00 AM and are programmed to run for the week beginning 5 February (through 11 February 2026).
The programme will affect the M275 (including full overnight closures of the motorway in the sections covered by the notice) and sections of the M27 around the Hilsea/Cosham interchange. Project documents and National Highways communications say the work includes technology upgrades — such as new CCTV/sensor equipment and overhead signage/gantries — alongside routine maintenance and inspections.
Drivers are advised to plan for longer journeys: traffic will be diverted on to local roads, including routes using the Portsbridge Roundabout, and congestion on diversion corridors is likely. Local reporting and the project dossier warn that ferry passengers, late‑shift workers and freight operators who normally use the M275 could be particularly affected during the overnight closures. Motorists should check National Highways’ live travel information and local council updates before travelling.
About this article: This story was put together with the help of AI tools and checked by a real person on our team. We're a small crew trying to cover as much of the UK as we can on a limited budget. We're getting better every day - but we're not perfect yet. If something looks off, let us know. You're part of the process.
