 The Southern Way Link Road ( Welsh : Ffordd Gyswllt y Ffordd <unk> ) , generally known simply as Southern Way , was built in two parts ; the first section of Southern Way to be completed was between Newport Road ( <unk> road ) and the Eastern Avenue ( A48 road ) in 1978 . The final section of the link road was built between Newport Road and the Rover Way – Lamby Way roundabout and was opened in 1984 at a cost of £ 9 million and includes the East Moors Viaduct , which is also known as the Southern Way <unk> . In 1987 it was envisaged that the present single @-@ carriage would be " twinned " as a dual @-@ carriageway , the same as the rest of the PDR . The 2 @.@ 25 km ( 1 @.@ 40 mi ) link road now runs from the Rover Way – Lamby Way Roundabout ( 51 @.@ <unk> ° N 3 @.@ <unk> ° W ﻿ / 51 @.@ <unk> ; <unk> ﻿ ( Rover Way – Lamby Way Roundabout ) ) to the Llanedeyrn Interchange ( 51 @.@ <unk> ° N 3 @.@ <unk> ° W ﻿ / 51 @.@ <unk> ; <unk> ﻿ ( Llanedeyrn Interchange ) ) on the A48 . 
