M3

M3

London to Southampton

The M3 is the road south-west from London, serving the densely populated towns in the west of Surrey, the north of Hampshire and the south of Berkshire. It's not especially long as major inter-urban motorways go, but it certainly isn't quiet, and it's had more than its share of controversy.

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M3

M3 and A316

A grand south western approach road from London to Basingstoke and Southampton: the A316 was entangled in local politics, and the M3 was never to enter London at all.

Routes

What's new

South London's lost motorways

Completing the story of London's epic Ringways, we've just published the Southern Radials, five more motorways that never saw the light of day.

To the north east!

Two new additions to our collection of Opening Booklets take us to Darlington and Middlesbrough.

The ghost junction

The only UK motorway that didn’t connect to ordinary roads finally got its own interchange in 2019. But it's not open, because it still doesn’t touch any ordinary roads.

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Harry Yeadon

A civil engineer, working principally in the North West of England, responsible for many of the area's motorways.