Route
Junction number
44
Markerpost
301.2 km
Name
Lôn-las Interchange
Type
Non-standard interchange
Terminus
Not a terminus
Other routes
A48, A4230, B4291, B4625
Authority
Restricted turns
Full access
Services
No services
M4 J44 Lôn-las Interchange
Layout and signage
|
Abertawe (D) Swansea (E) A48 |
A4230 B4291 |
|
A48 B4625 |
Abertawe (D) Swansea (E) A48 |
Lane configuration
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
- Lane 1 continues, with option to exit.
- Lane 2 continues ahead.
What's new
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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.
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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.
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