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

LanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues, with option to exit.

LanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues, with option to exit.

Other events

  • Signs Traffic signals
  • Signs 50mph speed limit begins
  • Signs Traffic signals
  • Signs National Speed Limit begins

In this section

What's new

Silver bullet

The Silvertown Tunnel is finally open for business. One question remains: what’s it for?

Skid Risk, Accident, Fog

For the first time, we can share pictures of the pioneering experiment that lit up the Worcestershire countryside with enormous signs 61 years ago.

All change

In July 2024, a new Government entered office with a very different set of priorities. What does it mean for a faltering roads programme?

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