Construction of a new at-grade single carriageway to replace the existing A473 from Llantrisant to Treforest, bypassing Church Village, Llantwit Fardre and Ton-teg.
This scheme was completed in and we're no longer accepting updates or changes to this page.
The first phase, from Cross Inn to Gwaun Meisgyn, has opened.
The first major section of the bypass, from Crown Hill to Creigiau, opened in April 2010. Final tie-in work is almost complete on the remaining sections, with an anticipated completion date of 20 August 2010.
The new road was officially opened today by the Welsh First Minister, marking the end of the project.