Dyfed-Powys Police confirmed the A40 is closed in both directions between the PC World Roundabout and Abergwili Roundabout, and will likely be closed for some time. Drivers are being advised to allow extra time for their journey (Image: AA Route Planner)A spokesperson for Dyfed-Powys Police said: "Dyfed-Powys Police have closed the A40 between the PC World Roundabout and Abergwili Roundabout in both directions. "The road is currently closed due to a road traffic collision. "The road is likely to remain closed for some time whilst officers remain at the scene. "Please allow extra time for your journey, as congestion and delays are likely during peak traffic times, [and] diversions are in place".