The M27 will close at 22:00 on Friday 31 January between Junctions 3 and 4, until 05:00 on Monday 3 February. Similar closures in June and September caused gridlock on the road network in Southampton. There are also lengthy diversions in place, especially if travelling westbound. This is scheduled to be the final weekend closure before the Romsey Road bridge opens again in February. The diversion route maps are linked below, and further information is available on the Highways England website.
Westbound Diversion Eastbound Diversion