 The PDR has 3 separate sections ; the Capel Llanilltern Interchange ( M4 <unk> ) to Queen 's Gate roundabout , the Rover Way – Lamby Way roundabout to the Llanedeyrn Interchange ( A48 ) and the Pontprennau Interchange ( A48 ) to the Pentwyn Interchange ( M4 <unk> ) . 
