Route
Junction number
None
Markerpost
32.1 km
Name
Swansea Road Roundabout
Type
Roundabout
Terminus
Not a terminus
Other routes
A4102
Authority
Restricted turns
Full access
Services
No services
A470 Swansea Road Roundabout
Layout and signage
|
Gelli-deg Merthyr Tudful Canol y dref Merthyr Tydfil Town centre A4102 |
|
A4102 |
Merthyr Tudful Canol y dref Merthyr Tydfil Town centre A4102 Gelli-deg |
Lane configuration
- Lane 1 continues, with option to exit.
- Lane 2 continues, with option to exit.
- Lane 1 continues, with option to exit.
- Lane 2 continues, with option to exit.
What's new
The road that made no sense
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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.
Have you seen...
Abbreviations
How do you describe a road? One way is to use these engineering abbreviations, much loved by the UK's community of road enthusiasts.
About this page
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Published
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