A465 section 5 and 6: Croesbychan junction

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What we’re doing

• moving and re-planting ancient woodland
• laying a temporary road
• moving utilities
• building a bridge over the Vale of Neath railway line
• building a new road and roundabouts

We will build a new junction to replace the existing one. The junction and the road will be built mostly on embankment up to 42 ft (13m) high.

We will also build a viaduct over the Nant Melyn watercourse, which will carry the new A465. The existing Nant Melyn Viaduct will be used by Non-Motorized Users (NMUs) only.

We will build a temporary road to provide space for construction of the permanent road.

The work will be done in phases.

Current progress

We have:

• carried out environmental surveys
• cleared vegetation ready for work to start
• started to prepare the site to move utilities
• built a temporary roundabout to the west of Court Lodge Underbridge
• installed fencing
• built two new permanent roundabouts and connecting roads to update the local road network
• began building the new Nant Melyn Viaduct
• created new habitats for dormice and enhanced existing dormice habitats
• started building the Vale of Neath Railway bridge abutments

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Next steps

• Continue to monitor Dormice habitats   
• Ongoing building of Vale of Neath Railway bridge, Croesbychan and Court Lodge underbridges  
• Continue building the Nant Melyn Viaduct

For traffic news on this junction, visit Traffic Wales.