 The £ 8 @.@ 5 million Central Link ( Welsh : Ffordd Gyswllt <unk> ) between the Queen 's Gate Roundabout ( 51 @.@ <unk> ° N 3 @.@ <unk> ° W ﻿ / 51 @.@ <unk> ; <unk> ﻿ ( Queen 's Gate Roundabout ) ) and the junction on Adam Street ( 51 @.@ <unk> ° N 3 @.@ <unk> ° W ﻿ / 51 @.@ <unk> ; <unk> ﻿ ( Adam Street Junction ) ) on the A4160 was opened on 16 February 1989 . When it was first opened it only linked Cardiff city centre with Cardiff Bay . It was not until the Butetown Link was opened on 27 March 1995 that this road started to be used as a link to the motorway network , Penarth and the Vale of Glamorgan . It will not be until the Eastern Bay Link is built , when traffic from the city centre will use it to travel east , that it will be fully used . The length of the <unk> is just 1 @.@ 45 km ( 0 @.@ 90 mi ) and is entirely a two lane dual carriageway with <unk> restrictions . 
