Iarnród Éireann has informed me that all platforms on the outer suburban network serving Dublin have been extended to cater for eight car trains. Many of the platforms on the DART rail line are also capable of taking eight car trains. However, a number of DART platforms, particularly Tara Street, require extensions to accommodate eight car DART trains. In this regard, planning is under way on a DART upgrade project and Exchequer funding has been provided for platform extensions and increased power supply to facilitate eight car DART trains.
In relation to Tara Street, proposals to develop the station facilities and site, including platforms, are awaiting planning approval from Dublin Corporation.