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Dowlais Top junction will provide access to the A4060, Dowlais Top high street and Pengarnddu industrial estate.

First published:
15 September 2021
Last updated:
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Map showing the works at Dowlais Top junction
Map showing the changes at Dowlais Top junction

What we're doing

  • moving utilities
  • building a temporary road
  • building a slip road
  • building a bridge at Jones street
  • building bridges
  • creating lapwing habitat
  • building a temporary roundabout

The junction will have 2 temporary roundabouts during the construction. This will help us to build 2 new bridges. These will carry the A465 over the completed junction to join the A465 dual carriageway. The 2 temporary roundabouts will be replaced with a new single roundabout.

The road will be built on embankment up to 30ft (9m) above the existing level.

We will create a new lapwing habitat to the east of the junction.

We will move utilities, including overhead high voltage cables to build the new road.

Next steps

  • winter 2021: we will build the temporary junction. We will build 2 temporary roundabouts on the site of the existing junction to allow traffic to merge more easily.
  • 2022: start to build the 2 bridges that will carry the A465 over the existing roundabout
  • 2022: we will investigate former mineworks and start treatment works

For traffic news on this junction, visit Traffic Wales.