High Quality Content by WIKIPEDIA articles! The Vale of Glamorgan Line is a commuter railway line in South Wales from Cardiff to Bridgend via Barry, Rhoose and Llantwit Major. There are also branch lines to Penarth and Barry Island. As its names suggests, the line runs through the Vale of Glamorgan.Originally part of the Barry Railway Company, the line opened from 1885. The whole of the Barry Railway, including Barry Docks, became a constituent part of the Great Western Railway in 1923, post the railway grouping. Local traffic on the line included that from the limestone quarries and the cement works Aberthaw, and Rhoose cement works at the eastern end of the line. Wartime traffic was created from Tremains and Brackla Hill at Bridgend and the RAF base at St. Athan. More recent developments were the opening of Aberthaw power station in February 1966 and the Ford engine plant at Bridgend in January 1980.