The Coryton Line is a commuter railway line in Cardiff from the city centre to Heath, Birchgrove, Rhiwbina, Whitchurch and Coryton. It was originally opened as part of the main line of the Cardiff Railway. The line is operated by Transport for Wales as part of the Valley Lines network. TfW replaced the previous franchise, Arriva Trains Wales in October 2018. Rolling stock seen operating the line are normally class 153s, class 150s or even 158s. Services normally continue to Radyr via the City Line and then back towards Coryton.