[1] Two routes formerly diverged from the TVR's main line between Cardiff and Merthyr here – the Rhymney Railway's original main line northwards to Bargoed and Rhymney via Aber Junction (opened in 1858) and a much more recent spur to Nantgarw Colliery opened by British Railways in 1952 to permit the closure of most of the surviving Cardiff Railway route beyond Coryton.

The Rhymney line, which diverged at Walnut Tree Junction just south of the station[2] was known locally as the Big Hill, due to its severe gradients (as steep as 1 in 48) for northbound trains.

During Monday-Saturday daytimes, there are usually six trains an hour from Cardiff Central to Pontypridd and thence to one of Treherbert, Merthyr Tydfil or Aberdare (half-hourly to each).

Connections for the City line can be made at Radyr, for Cardiff Bay & Coryton at Queen Street and at Central for Penarth.

[4] The first City Line service of the day starts back from Taffs Well at 0653 to Coryton (with a 0704 departure from Radyr).