Dublin Suburban Rail

The Luas light rail system is not part of this network and is not operated by Iarnród Éireann.

Fewer trains run on Sunday than any other day, and special timetables may be made for public holidays.

The bridge at Drogheda MacBride is a single track that may hinder high-frequency services in the long term.

Stations served - City branch: Dublin Heuston, Park West & Cherry Orchard, Clondalkin & Fonthill, Kishoge, Adamstown, Hazelhatch & Celbridge, Sallins & Naas, Newbridge, Kildare, Monasterevin, Portarlington and Portlaoise.

Grand Canal Dock branch: Grand Canal Dock, Dublin Pearse, Tara Street, Dublin Connolly, Drumcondra, Park West & Cherry Orchard, Clondalkin / Fonthill, Kishoge, Adamstown, Hazelhatch & Celbridge, Sallins & Naas and Newbridge.

This line is connected directly with the rest of the network, despite being operated out of the Dublin Heuston terminus, by the Phoenix Park Tunnel, the Luas and Dublin Bus routes 145, C1, C2, C3, C4 and the 46a which operate to within a short walk of Tara Street.

This work was part of the Kildare Route Project, which included quadruple-tracking the line between Le Fanu Road (east of the former Cherry Orchard station) to just beyond Hazelhatch.

Another new station was built between Adamstown and Clondalkin at Kishoge, which is located adjacent to the Lucan Outer Ring Road.

This station was completed in 2009, however no funding was available in order to construct an access road and adjacent car park.

On 21 November 2016 the first trains ran from Grand Canal Dock through the Phoenix Park Tunnel serving Newbridge.

Stations served - City branch: Dublin Pearse, Tara Street, Dublin Connolly, Drumcondra, Broombridge, Pelletstown, Ashtown, Navan Road Parkway, Castleknock, Coolmine, Clonsilla, Leixlip Confey, Leixlip Louisa Bridge, Maynooth, then continuing onto Kilcock, Enfield, Mullingar, Edgeworthstown and Longford.

Most of the station buildings on this line were a mixture of small block built booking offices and converted steel cabins and there was still a limited service owing to the single track between Clonsilla and Maynooth.

[2] In June 2013, another station opened on this branch called Hansfield serving Ongar and Clonee areas.

[citation needed] The level crossing on the Ratoath Road has been replaced by an overbridge which was completed in February 2015.