Bute Street, Cardiff Bute Street, Cardiff Bute Street () is a street in Cardiff, Wales. It links Cardiff Bay (previously Tiger Bay) and Butetown with Cardiff city centre. It now has no road number. It runs from the dockside of the Mermaid Quay complex in the south, which is now a pedestrian zone, to the junction of Bute Terrace (A4160) in the north. What is today Bute Street was previously mostly meadow and marshland called Soudrey, the Cardiff south moors. The 2nd Marquess of Bute realised in the 1820s that the Glamorganshire Canal was not sufficient to cope with the demands of the
Cardiff Bay railway station building and its setting". In June 2018, new operator Transport for Wales Rail Services announced plans to build an extension and new terminus for the Butetown Branch, along with an intermediate station at Loudoun Square. These will replace the existing station, which will close. There is a shuttle service between Cardiff Queen Street and Cardiff Bay every 12 minutes Monday to Saturdays (between 0630 and 2330) and every 12 minutes on Sundays (between 1100 and 1630) using a Class 153 "Super Sprinter". The service was formerly operated by a Class 121 "bubble car", but this was withdrawn in June 2013.