The M3 motorway runs for 61 miles from Sunbury Cross (J1) (A308/A316) to Southampton (A33)
The M3 motorway runs for 61 miles from Sunbury south-west of London to the port of Southampton. Travelling south-west from London the M3 crosses the M25 passing Bagshot, Camberley, Frimley, Farnborough, Fleet, Basingstoke,Winchester and Eastleigh. The M27 links the M3 at Southampton with the New Forest, which is to the west and the historic City of Portsmouth to the east.