A404(M) Maidenhead Bypass

Maidenhead Bypass
Opened
Current route
A404(M)
Start point
M4 J8/9
Holyport
End point
9B
The Thicket
Original route
M4
Other numbers held
A423(M)

Part of a larger scheme, the rest of which remains M4.

Road scheme and chronology data is courtesy SABRE (where much of it was gathered by member Ross Spur), with additional data from the UK Motorway Archive, the Scottish Roads Archive and the Northern Ireland Roads Site.

In this section

What's new

Skid Risk, Accident, Fog

For the first time, we can share pictures of the pioneering experiment that lit up the Worcestershire countryside with enormous signs 61 years ago.

All change

In July 2024, a new Government entered office with a very different set of priorities. What does it mean for a faltering roads programme?

A century of motorways

It's 100 years since the opening of the world's first motorway, the Autostrada from Milan to the Lakes.

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Have you seen...

The Improbable A39

It crosses cattle grids and untamed moorland, it climbs 1-in-4 hills and plummets through hairpin bends, it runs single-track through woodland and historic villages. It's rugged and beautiful. Is it really the A39?

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