A Cardiff Council spokesperson said: "Cardiff Council has spoken to the contractor asking for a comprehensive breakdown of the work that still needs to be completed on the section of Llantrisant Road between the Heol Isaf roundabout and the Westward Ho petrol station to install vital infrastructure and utilities. 

"Urgent meetings are being held to discuss how further on-site measures can be put in place to ease congestion and reduce the significant impact that residents and commuters are currently facing. 

"The contactor is introducing additional, manually-controlled traffic lights at peak times which will be responsive to traffic flow. 

"Assurances have been given that every possible option to reduce the disruption is being explored and that the work will be carried out as quickly as possible." 

More details on the work programme and on the new lights are available to view on Redrow's Plasdwr website here:https://plasdwr.co.uk/llantrisant-road/