|East end||Cardiff Bay|
|West end||Barry Island|
The road goes through the village of Dinas Powys and there has been a call for by-pass due to the volume of traffic from Barry to and from Cardiff. However the Vale of Glamorgan Council confirmed in June 2007 that the by-pass would have to be funded by the Welsh Assembly Government (WAG).
The road starts from the Cardiff International Sports Village at the Ferry Road Interchange (A4232), then along the Cogan Spur until the junction of Barons Court. From there it goes through Llandough and Dinas Powys. The road then enters the Barry district of Palmerstown along Cardiff Road and goes into Weston Square, Gladstone Road, Broad Street, Harbour Road and finally Friars Road in Barry Island.
- "Report of the State of the Area Debate held on 5th June, 2007 at Dinas Powys Parish Hall". Vale of Glamorgan Council. Retrieved 12 March 2008.
- "Cardiff Timeline". cardiffians.co.uk. Archived from the original on 12 August 2007. Retrieved 2007-08-15.
Media related to A4055 road (Wales) at Wikimedia Commons