Route
Junction number
(M4 J43)
Markerpost
0.0 km
Name
Llandarcy Interchange
Terminus
Terminus at end of exit list
Other routes
M4, B4290
Authority
Restricted turns
Full access
Services
No services
A465 Llandarcy Interchange
National Speed Limit begins
40mph speed limit beginsWhat's new
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.
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.
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.
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