A479 road

It connects Crickhowell to Llyswen via the Rhiangoll valley and Talgarth, running through the Brecon Beacons National Park.

[1] From Crickhowell to Talgarth, the road is in the Brecon Beacons National Park, and follows the Rhiangoll valley.

Because this part of the road runs through the Brecon Beacons, additional treatment was needed to minimise disruption with the nearby countryside.

This included a specific alignment of the highway, and replanting of hedgerows to fit in with the existing parts of the road.

[10] In February 2017, the road was closed for an extended period in order to lay new foundation work.