Railway signal
It was first opened on this site as "Navigation Road" in 1840 and was then renamed "Aberdare Junction" by the Taff Vale Railway in 1846 then further renamed "Abercynon" in 1896 and to "Abercynon South" in 1988. The original station buildings, including the Great Western Railway signal box of 1932 (which originally came from Birmingham Moor Street station) have been demolished, with the signal box being demolished near the end of 2013.