Route
Junction number
M4 J8/9
Markerpost
45.2 km
Name
Holyport Interchange
Terminus
Terminus at end of exit list
Other routes
M4, A308(M)
Authority
Restricted turns
Full access
Services
No services
A404(M) (M4 J8/9) Holyport Interchange
What's new
The forever bottleneck, part 1
The M4 into London was one of the UK's earliest and most ambitious motorway projects. It was bold, pioneering... and almost instantly regretted.
Hello, here's my ridiculous side project
An introduction to what I write, and why I write it, and where my strange new road sign simulator fits in to all this.
London, in a new light
It was specially designed never to be noticed. And now it's disappearing, nobody has noticed its absence. It's London's own bespoke street light.
Have you seen...
Ringways
The story of an incredible plan to reshape London into a city of motorways, with the history from creation to cancellation and details on every unbuilt road.
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