Winchester Bypass Closures Today

The Winchester Bypass forms part of the M3 motorway, routing traffic around the historic cathedral city of Winchester in Hampshire. The bypass connects the M3 to the A34 and A31, providing a strategic route for traffic between London and the south coast. National Highways manages this section of the M3, which is subject to high traffic volumes particularly during summer holiday periods.

The Winchester Bypass is maintained by National Highways. Road closures on the Winchester Bypass are reported through the UK government's Street Manager system and appear here in real time.