Route
Junction number
None
Markerpost
Unknown
Name
Abercynon Roundabout
Type
Roundabout
Terminus
Not a terminus
Other routes
A472, A4054, A4059
Authority
Restricted turns
Full access
Services
No services
A470 Abercynon Roundabout
Layout and signage
|
Aberpennar Mountain Ash Aberdâr Aberdare A4059 Ystrad Mynach A472 Aberfan (A4054) |
A4059 |  |
A4054 A472 A4054 |
Ystrad Mynach A472 Aberfan (A4054) Aberdâr Aberdare A4059 |
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.
Other events
Traffic signals
50mph speed limit begins
- Traffic signals
National Speed Limit begins
What's new
A century of motorways
It's 100 years since the opening of the world's first motorway, the Autostrada from Milan to the Lakes.
Schrödinger’s speed limit
In 2022, Manchester City Council say they reduced the speed limit on the Mancunian Way to 30mph. But it’s not clear if they did. It’s not even clear if they can.
Sorry, wrong number
Road numbering is a system with clear rules. What happens when the people responsible for numbering roads don't follow them?
Have you seen...
Junction Three
The M621 has one junction where everything leaves the motorway and heads for the city, and a very bizarre junction it is too.
About this page
Published
Last updated
Published
Last updated
