|From:||Upton, Hampshire (SU371174)|
|To:||Redbridge, Southampton (SU373137)|
|Distance:||2.3 miles (3.7 km)|
|Meets:||A3057, M27, A35|
|Route outline (key)|
Being west of the M3, it's often claimed that the M271 is in the three-zone, but this is not the case as the zone 2-3 boundary follows a theoretical straight-line continuation of the M3 from junction 8.
It is one of three (or arguably four) British motorways which negotiate a roundabout during their length, along with A627(M), A601(M) and arguably M58. Despite having four junctions, only one is numbered and grade-separated in favour of M271.