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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:
Map showing the changes 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

We have created 2 temporary roundabouts at the junction. These are needed to help build 2 new bridges. These will carry the A465 over the completed junction to join the A465 dual carriageway. The 2 temporary roundabouts will eventually 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.

We have:

  • cleared vegetation
  • built two temporary roundabouts to improve traffic flow and create space to build two bridges
  • diverted traffic onto the eastbound carriageway
  • set-up a temporary site for the construction team
  • investigated and carried-out treatment work on mineworks
  • undertaken extensive earthworks
  • diverted utilities
  • started construction work for the new bridges at the existing roundabout
  • installed a new pedestrian bridge at Dowlais Ponds. (Opening date TBC)


Works at Dowlais Top junction
Works at Dowlais Top junction

Next steps

  • ongoing construction of the two bridges that will carry the A465 over the existing roundabout
  • placing earth to create the embankment for the new A465 dual carriageway
  • ongoing diversion of utilities.

For traffic news on this junction, visit Traffic Wales.