 The Pentwyn Link Road section from the Pontprennau Interchange on the A48 to the Pentwyn Interchange on the M4 ( junction 30 ) is one of the newer sections of the PDR , having been opened in 1984 , it is 1 @.@ 61 km ( 1 @.@ 00 mi ) in length . The road between the Llanedeyrn Interchange to the Pontprennau Interchange is the A48 ( Eastern Avenue ) , it too is a dual carriageway and is a concurrent road with the PDR , there are no plans to <unk> this section of the A48 . 
