A4

M4 and A4

Serving Reading, Bristol and South Wales, the A4 and M4 are one of London's most important approaches. But the wildest fantasies of the sixties couldn't overcome its trickier problems.

Routes
M4 A4

What's new

Gifts for road lovers

Keep being asked what you want for Christmas? No problem: here’s our pick of road-related Christmas treats for 2021.

Go west! New Ringways pages are here

A new set of Ringways pages are now online, looking at unbuilt motorways and road projects west of London.

No smoke without ire

London's Ultra Low Emission Zone has just expanded to cover the whole inner city, and across the UK, other cities are implementing their own Clean Air Zones. Is this the future?

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Aust to Beachley

Today two motorways cross the Severn near Chepstow. But as recently as 1965, the only crossing was a ferry that carried six cars at a time, from Aust to Beachley.