Llantrisant and Taff Vale Junction Railway
In time the Canal became overwhelmed by the volume of traffic, and encouraged by the successful opening of railways with more advanced technology than the horse tramways of previous years, the Taff Vale Railway was promoted. It was authorised by Parliament in 1836 and it opened between Merthyr and Cardiff docks in 1841. The line passed close to the Maesmawr workings but did not make a connection.
Barry Railway Company
The Taff Vale set about obtaining Parliamentary authorisation in 1885 to acquire the Bute Docks, but this was refused by the Lords Committee when the Taff Vale would not agree to running powers requested by the Barry Railway northward from the Trehafod and Treforest connections. The Taff Vale also supported a nominally independent Cardiff, Penarth and Barry Junction Railway which would be a spoiler to the Barry company's development plans at Barry itself, but this was refused, the Barry being granted a corresponding railway from Barry to a junction at Cogan with the Taff Vale's Penarth lines, by Act of 31 July 1885. The Taff Vale was granted a circuitous coastal route from Penarth to Cadoxton.