Plans Unveiled to Redesign Dangerous Nantycaws Junction on Busy A48 Route

Plans are being developed to redesign the Nantycaws junction on the A48, a busy section of road between Carmarthen and Cross Hands, as part of a wider effort to improve safety and transport links along the corridor.

The Welsh Government has been reviewing the stretch of the A48 between Cross Hands and Pensarn to address long-standing safety concerns, traffic flow issues and access to nearby services. The Nantycaws junction has been identified as one of the key locations where changes could make a significant difference.

At present, the junction area includes several smaller access points and gaps in the central reservation that allow vehicles to cross the dual carriageway. Transport planners say these movements can be dangerous because drivers often need to cross fast-moving traffic travelling in both directions. As a result, the layout has been identified as posing a higher risk of collisions compared with more controlled junction designs.

Under the proposals being studied, several of these smaller access points could be closed and replaced with a single, purpose-built junction serving the Nantycaws area. This would concentrate turning movements into one location, reducing the need for vehicles to cross the carriageway at multiple points.

Although final designs have not yet been confirmed, early proposals suggest the new layout could include a larger controlled junction, possibly a roundabout or signal-controlled junction, allowing traffic to enter and leave the A48 more safely. The scheme could also improve access to nearby facilities including the Nantycaws recycling centre and other local services.

The Nantycaws changes form part of a broader transport study examining improvements along the A48 corridor into Carmarthen. The review is also considering wider measures such as better bus access, improved facilities for walking and cycling, and changes to other junctions along the route to improve safety and traffic flow.

Transport officials say the aim is to modernise the road network while making it safer for all users, including drivers, public transport and pedestrians.

The project is currently being developed under the Welsh Transport Appraisal Guidance process, which is used to assess major transport schemes in Wales. At this stage planners are still studying options, gathering technical data and considering the potential impacts of different designs.

A preferred option has not yet been formally selected, and the scheme has not reached the construction stage. Further design work, environmental assessments and consultation with local communities would be required before any building work could begin.

If approved and funded, the project could lead to significant changes in how drivers access the A48 around Nantycaws, potentially replacing the current layout of multiple smaller junctions with a single, safer access point for the area.

Independent candidate criticises roundabout proposal

Independent Caerfyrddin candidate Carl Peters-Bond has criticised the proposal to build a new roundabout at Nantycaws on the A48, warning it could lead to years of disruption while failing to resolve long-term safety and congestion issues on the route.

The plans, first reported by WalesOnline, could involve significant construction work on one of Carmarthenshire’s busiest trunk roads, used daily by commuters, freight traffic, emergency services and local businesses.

Mr Peters-Bond said he believes adding another roundabout on the route would risk increasing congestion rather than solving existing problems.

“The solution to the dangerous A48 does not lie in years of construction, disruption and delays, only to leave us with even more congestion at a brand-new roundabout at Nantycaws, right in the middle of a vital trunk route. That is not a serious long-term plan for a road of national importance.”

He argued that the existing roundabouts between the end of the M4 and the A40 at Carmarthen are already heavily used and warned that adding another could slow traffic further along the corridor.

Mr Peters-Bond said he believes a longer-term approach to improving the A48 would involve reducing direct side access onto the road and upgrading junctions to improve safety and traffic flow.