Route
Junction number
9B
Markerpost
48.8 km
Name
Maidenhead Thicket Interchange
Terminus
Terminus at top of exit list
Other routes
A4
Authority
Restricted turns
Full access
Services
No services
A404(M) J9B Maidenhead Thicket Interchange
Layout and signage
|
Twyford Reading Maidenhead A4 Marlow High Wycombe Oxford (M40 Link) A404 |
A4 |
|
A4 |
N/A |
Lane configuration
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
Other events
End of motorway regulations
Start of motorway regulations
What's new
The road that made no sense
It was the UK's only single-carriageway motorway, and twenty years ago it ceased to exist. This is the story of the strange fascination it held, and of my place in history.
The forever bottleneck, part 2
The second part of the story, where we learn why exactly the M4 gets narrower on the final approach to Europe’s biggest city.
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.
Have you seen...
Hogarth Flyover
It makes the traffic situation in one part of West London much more bearable but it should have been removed more than quarter of a century ago. It's amazing what you can do with a big Meccano kit.
About this page
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Published
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