M27 traffic today
Southampton to Portsmouth corridor. Check current and upcoming road or lane closures reported through National Highways Digital Lab.
Closures and disruptions on M27
Planned and unplanned road or lane closures. Planned records are limited to the next seven days so the list stays useful before a journey.
Powered by National Highways’ Transport Data Feeds · Coverage and limitations
How to read this M27 page
The list combines planned and unplanned closure records for M27. Use the time filter to separate closures active now from those due within 24 hours or the next seven days.
Closure data is useful for pre-journey planning, but it does not represent every cause of slow traffic. A missing record is not a guarantee that M27 is clear.
Refresh shortly before leaving. During the journey, follow road signs, police directions and official diversion instructions.
Other major roads
M27 traffic questions
Does this show every M27 traffic delay?
No. This page focuses on planned and unplanned closure records from National Highways. Congestion or other disruption can exist without a closure record.
How often is the M27 closure list refreshed?
The browser rechecks automatically while the page is visible, while the server uses a short shared cache to keep requests current and within the official API rate limit.
What does zero M27 closures mean?
It means no matching closure records were returned in the current feed and filters. It is not an all-clear for traffic conditions.