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The A470 junction will connect the A470 to the A465.

First published:
15 September 2021
Last updated:
Map showing A465/A470 road plans
Map showing A465/A470 junction plans

 What we’re doing

  • building a temporary road
  • moving utilities
  • building new viaducts at Nant Ffrwd and Taf Fawr
  • building a bridge
  • junction improvements

We will build a new junction to replace the existing one at the A470/A465 roundabout.

The junction will have two roundabouts on the A470 with roads to the A465.

We are going to build a bridge to carry the A465 over the connector road between the 2 roundabouts.

We will build new viaducts to bridge the Nant Ffrwd and Taf Fawr watercourses.

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

Current progress

We have:

  • cleared vegetation ready for work to start
  • started moving the overhead high voltage cables
  • built access tracks to the bridges
Work at Nant Ffrwd
The works at Nant Ffrwd
the works at Taf Fawr
The works at Taf Fawr

Next steps

  • Spring 2021 to summer 2021: we will complete the new farm/property access private road to replace the existing section of private road.
  • Summer 2021 to summer 2022: we will build a new temporary A470 road to the north of the roundabout (see orange lines on the map).
  • Summer 2021 to spring 2023: we will build a new bridge and viaduct to carry the eastbound slip road from the A465 and A465 main carriageway over Nant Ffrwd.
  • Summer 2021 to autumn 2023:  we will build a new viaduct to carry the A465 carriageway over Taf Fawr.

For traffic news on this junction, visit Traffic Wales.