Dublin Metro

The Dublin Metro (Irish: Meitreo Átha Cliath) is a proposed metro system for the city of Dublin. The first two lines were set out in the Irish Government's 2005 Transport 21 transport plan: they are known as Metro North and Metro West. The metro scheme is part of the planned rail infrastructure of Dublin, along with Luas trams, DART and Dublin Suburban Rail network.

Metro North (Irish: Meitreo Thuaidh) is to run from St. Stephen's Green to the airport and on to Swords, ending at the Broadmeadow Estuary. Its route is planned to consist of two deep bore tunnels under the airport and in the city, along with cut and cover tunnelling through the main street in Ballymun along with surface running in non built-up areas, and a few elevated sections. On 16 September 2008, the RPA submitted a Railway Order Application to An Bord Pleanála. On 27 October 2010, An Bord Pleanála granted a Railway Order for Metro North. It was speculated that the Metro North Project would be cancelled on 12 August 2011 following a review by Leo Varadkar, Minister for Transport, Tourism and Sport, this was to be confirmed on 10 November. On that day, the Irish Government announced that Metro North was being deferred.

Metro West (Irish: Meitreo Thiar) is to run from an intersection with Metro North, just south of the airport at Santry, and from there pass through Blanchardstown, Liffey Valley, and Clondalkin before joining the Red Line of the Luas to continue towards Tallaght. Metro West is planned to be entirely above ground, at road level, with major junctions overpassed. Metro West is currently planned to be 25.5 kilometres long. Planning on the Metro West Project was suspended in September 2011 following a review by Leo Varadkar, Minister for Transport, Tourism and Sport as money to construct the new railway will not be available in the foreseeable future.