Southern section

Taoiseach Brian Cowen in Cherrywood at the inaugural ride of the extended Green Line, 2010

Between Harcourt Street and Charlemont, the Green Line takes a large loop east around buildings which did not exist between 1859 and 1959. As such, there is no train bridge on Adelaide Road for the current line, as there had been for the Harcourt Street Line, but rather the current line travels on Adelaide Road to Charlemont.

The line then follows the old alignment of the Harcourt Street line from Charlemont station as far as Blackthorn Avenue where the line runs slightly south of the old line before reaching the current Sandyford stop (known as "Stillorgan" on the Harcourt Street line). After Sandyford the line detours over the Leopardstown Road/Brewery Road junction so as to run west around the Leopardstown Racecourse before rejoining the original alignment just north of Carrickmines.^[2] The Harcourt Street line had run around the eastern edge of the racecourse, via Silverpark. Remnants of the old Foxrock Station are visible at the back of The Hedgerows in Foxrock. The route deviation was seemingly intended to serve the new properties that would have been built during the "Celtic Tiger" boom, before the Extension was open.

After this detour around Leopardstown Racecourse, the current line runs roughly along the original alignment with some minor detours, particularly prevalent at Laughanstown and the line terminates a few yards south of where the line ran which is now being developed into the area of Cherrywood.

The Carrickmines/Bride's Glen section was also intended to have terminated into what should have a "Celtic Tiger" town centre, similar to the Tallaght area stops, until the Line B2 extension to Fassaroe/Bray was built. This is why, as of 2018, this end of the Green Line seemingly goes through fields to the middle of a construction site, as nearly all the property that was intended to be serviced by the line, was never built. This is also why there were unused "Ghost" stops built, to serve these unbuilt areas.

There are some other cosmetic differences between the Harcourt Street Line and the current Green Line, such as the positioning of the Ranelagh stop. The location of Ranelagh on the former line was at the current Beechwood stop. The old Ranelagh stop was the last stop on the old line before the train reached the city.

Luas Cross City

Luas Cross City (Irish: Luas Traschathrach), formerly called Luas BXD, is an extension to the Green Line which runs from St. Stephen's Green to Broombridge railway station.^[3]

Construction of Luas Cross City began in June 2013 and it opened on 9 December 2017.^[4][5] The Rosie Hackett Bridge carrying the new line over the river Liffey was opened on 20 May 2014.

The new section begins at the former city centre terminus, St. Stephen's Green, crosses the Red Line near the Abbey stop, and continues northwards, terminating at Broombridge station. There it connects passengers using Iarnród Éireann commuter services to Maynooth railway station and M3 Parkway railway station.

Stops

Image	Name Name in Irish	Zone	Location	Transport interchange	Serves
	Broombridge Droichead Broome	Green 1	Broombridge railway station 53°22′22″N 6°17′56″W / 53.372684°N 6.298975°W / 53.372684; -6.298975	Broombridge Dublin Bus routes 40e	Tolka Valley Park Dublin Industrial Estate
	Cabra Cabrach	Green 1	Connaught Street / Fassaugh Road 53°21′51″N 6°16′54″W / 53.364200°N 6.281745°W / 53.364200; -6.281745		Cabra Mount Bernard Park National Botanic Gardens Glasnevin Cemetery
	Phibsborough Baile Phib	Green 1	North Circular Road / Cabra Road 53°21′37″N 6°16′48″W / 53.360235°N 6.279945°W / 53.360235; -6.279945		Phibsborough Dalymount Park St Peter's Church, Phibsborough
	Grangegorman Gráinseach Ghormáin	Green 1	Grangegorman 53°21′28″N 6°16′39″W / 53.357700°N 6.277520°W / 53.357700; -6.277520	Drumcondra (walk 1.6 km/0.99 mi) dublinbikes	Mater Misericordiae University Hospital Technological University Dublin Phoenix Care Centre
	Broadstone —DIT An Chloch Leathan — ITBhÁC	Green 1 / Central	Western Way 53°21′16″N 6°16′23″W / 53.354517°N 6.272976°W / 53.354517; -6.272976	Drumcondra (walk 1.6 km/0.99 mi) Dublin Bus routes dublinbikes	Stoneybatter King's Inns 14 Henrietta Street Blessington Street Park Technological University Dublin
	Dominick Doiminic	Central	Dominick Street Lower 53°21′05″N 6°15′56″W / 53.351386°N 6.265649°W / 53.351386; -6.265649	Dublin Bus routes dublinbikes	Cineworld Dublin Ilac Centre 14 Henrietta Street DIT Bolton Street Rotunda Hospital
	Parnell	Central	Parnell Street East 53°21′11″N 6°15′38″W / 53.352993°N 6.260424°W / 53.352993; -6.260424 (Southbound only)	Many bus routes on Parnell Street / Parnell Square dublinbikes	Gate Theatre James Joyce Centre Hugh Lane Gallery Dublin Writers Museum Mountjoy Square
	Marlborough Maoilbhríde	Central	Marlborough Street South 53°20′59″N 6°15′29″W / 53.349843°N 6.258149°W / 53.349843; -6.258149 (Southbound only)	Luas Red Line Abbey Street (walk 100 m/110 yd) Dublin Connolly (walk 650 m/710 yd) Dublin Bus routes dublinbikes	Department of Education St Mary's Pro-Cathedral
	Trinity An Trionóid	Central	College Street 53°20′44″N 6°15′29″E / 53.345455°N 6.258085°E / 53.345455; 6.258085 (Southbound only)	Tara Street (walk 350 m/380 yd) Many bus routes on College Green dublinbikes	College Green, Dame Street Trinity College Parliament House Olympia Theatre
	O'Connell Upper Ó Conaill Uachtarach	Central	O'Connell Street North 53°21′06″N 6°15′40″W / 53.351572°N 6.261067°W / 53.351572; -6.261067 (Northbound only)	Many bus routes on O'Connell Street dublinbikes	O'Connell Street Savoy Cinema
	O'Connell - GPO Ó Conaill - AOP	Central	O'Connell Street South 53°20′59″N 6°15′37″W / 53.349625°N 6.260295°W / 53.349625; -6.260295 (Northbound only)	Luas Red Line Abbey Street (walk 140 m/150 yd) Many bus routes on O'Connell Street dublinbikes	O'Connell Street, Henry Street The Spire General Post Office
	Westmoreland	Central	Westmoreland Street 53°20′46″N 6°15′33″E / 53.346070°N 6.259072°E / 53.346070; 6.259072 (Northbound only)	Tara Street (walk 450 m / ¼ mile) Dublin Bus routes	The National Wax Museum Plus Trinity College Parliament House Olympia Theatre
	Dawson Dásain	Central	Dawson Street 53°20′29″N 6°15′29″W / 53.341516°N 6.258192°W / 53.341516; -6.258192	Dublin Pearse (walk 1 km / ⅔ mile) Dublin Bus routes dublinbikes	Dawson Street Grafton Street Kildare Street Leinster House St. Ann's Church, Dawson Street Kerlin Gallery Mansion House Leinster House National Museum of Ireland – Archaeology National Library of Ireland
	St. Stephen's Green Faiche Stiabhna	Central	St. Stephen's Green West 53°20′21″N 6°15′41″W / 53.339179°N 6.261350°W / 53.339179; -6.261350	Tara Street (walk 1.3 km / ¾ mile) Dublin Pearse (walk 1.6 km / 1 mile) Dublin Bus routes dublinbikes	St. Stephen's Green Grafton Street Gaiety Theatre Royal College of Surgeons of Ireland Dublin Castle and Chester Beatty Library
	Harcourt Sráid Fhearchair	Central	Harcourt Street 53°20′01″N 6°15′46″W / 53.333644°N 6.262734°W / 53.333644; -6.262734	Dublin Bus routes dublinbikes	National Concert Hall Iveagh Gardens Synge Street CBS
	Charlemont	Central / Green 2	Grand Parade 53°19′50″N 6°15′31″W / 53.330610°N 6.258630°W / 53.330610; -6.258630	Dublin Bus routes dublinbikes	Portobello Cathal Brugha Barracks Grand Canal
	Ranelagh Raghnallach	Green 2	Ranelagh 53°19′34″N 6°15′22″W / 53.326127°N 6.256212°W / 53.326127; -6.256212	Dublin Bus routes Go-Ahead Ireland routes	Ranelagh Rathmines Leinster Cricket Club Fitzwilliam Lawn Tennis Club
	Beechwood Coill na Feá	Green 2	Dunville Avenue / Beechwood Road 53°19′15″N 6°15′17″W / 53.320924°N 6.254658°W / 53.320924; -6.254658	Dublin Bus routes	Rathmines Sandford Park School
	Cowper	Green 2	Cowper Road 53°19′15″N 6°15′17″W / 53.320924°N 6.254658°W / 53.320924; -6.254658	Dublin Bus routes	Dartry Gonzaga College
	Milltown Baile an Mhuilinn	Green 2	Richmond Avenue South 53°18′35″N 6°15′07″W / 53.309654°N 6.251807°W / 53.309654; -6.251807	Dublin Bus routes	Milltown Golf Club Alexandra College Trinity Hall
	Windy Arbour Na Glasáin	Green 2	Churchtown Road Lower / St. Columbanus' Road 53°18′06″N 6°15′02″W / 53.301759°N 6.250675°W / 53.301759; -6.250675	Dublin Bus routes	Windy Arbour, Churchtown, Clonskeagh University College Dublin (Belfield campus; walk 1.7 km/1.1 mi Islamic Cultural Centre of Ireland De La Salle College Churchtown Central Mental Hospital
	Dundrum Dún Droma	Green 2/3	Dundrum / Taney Road 53°17′33″N 6°14′42″W / 53.292424°N 6.245123°W / 53.292424; -6.245123	Dublin Bus routes Go-Ahead Ireland routes	Dundrum Dundrum Town Centre (main entrance)
	Balally Baile Amhlaoibh	Green 3	Drummartin 53°17′10″N 6°14′12″W / 53.286030°N 6.236712°W / 53.286030; -6.236712	Dublin Bus routes Luas Park + Ride	Balally Goatstown Dundrum Town Centre (Dundrum South) Wesley College Mount Anville Secondary School Airfield Estate
	Kilmacud Cill Mochuda	Green 3	Benildus Avenue / Drummartin Link Road 53°16′59″N 6°13′27″W / 53.282948°N 6.224090°W / 53.282948; -6.224090	Dublin Bus routes	Kilmacud St Benildus College
	Stillorgan Stigh Lorgan	Green 3	Blackthorn Avenue 53°16′40″N 6°12′17″W / 53.277643°N 6.204595°W / 53.277643; -6.204595	Dublin Bus routes Luas Park + Ride	Stillorgan Sandyford Beacon Hospital RCSI Institute of Leadership
	Sandyford Áth an Ghainimh	Green 3/4	Blackthorn Avenue 53°16′39″N 6°12′17″W / 53.277618°N 6.204634°W / 53.277618; -6.204634	Dublin Bus routes Go-Ahead Ireland routes Luas Park + Ride	Sandyford Stillorgan Sandyford Business District
	Central Park An Pháirc Láir	Green 4	South County Business Park 53°16′12″N 6°12′14″W / 53.270099°N 6.203786°W / 53.270099; -6.203786	Dublin Bus routes Go-Ahead Ireland routes	Leopardstown Park Hospital Leopardstown Racecourse Kilmacud Crokes GAA Nord Anglia International School Dublin South County Business Park
	Glencairn Gleann an Chairn	Green 4	Murphystown Road 53°15′59″N 6°12′36″W / 53.266281°N 6.209923°W / 53.266281; -6.209923	Dublin Bus routes Go-Ahead Ireland routes	Glencairn House
	The Gallops An Eachrais	Green 4	Murphystown Way 53°15′40″N 6°12′21″W / 53.261157°N 6.205870°W / 53.261157; -6.205870	Dublin Bus routes Go-Ahead Ireland routes	Stepaside Leopardstown Kilgobbin Castle
	Leopardstown Valley Gleann Baile na Lobhair	Green 4	Ballyogan Road 53°15′30″N 6°11′54″W / 53.258316°N 6.198373°W / 53.258316; -6.198373	Dublin Bus routes Go-Ahead Ireland routes	Leopardstown shopping centre Ballyogan
	Ballyogan Wood Coill Bhaile Uí Ógáin	Green 4	Ballyogan Vale 53°15′18″N 6°11′04″W / 53.255078°N 6.184431°W / 53.255078; -6.184431	Dublin Bus routes Go-Ahead Ireland routes	Ballyogan The Park Carrickmines Stepaside Golf Course
	Carrickmines Carraig Mhaighin	Green 5	Glenamuck Road North 53°15′16″N 6°10′18″W / 53.254350°N 6.171621°W / 53.254350; -6.171621	Dublin Bus routes Go-Ahead Ireland routes Luas Park + Ride	Carrickmines Cabinteely Foxrock Cornelscourt The Park Carrickmines Golf Club Carrickmines Croquet and Lawn Tennis Club
	Laughanstown Baile an Lachnáin	Green 5	Laughanstown (Lehaunstown) 53°15′02″N 6°09′18″W / 53.250636°N 6.154953°W / 53.250636; -6.154953		Cabinteely Tully Church Brennanstown Portal Tomb
	Cherrywood Coill na Sílíní	Green 5	Grand Parade 53°14′43″N 6°08′45″W / 53.245382°N 6.145839°W / 53.245382; -6.145839	Dublin Bus routes Go-Ahead Ireland routes	Cherrywood Cherrywood Business Park
	Brides Glen Gleann Bhríde	Green 5	Cherrywood Business Park 53°14′31″N 6°08′34″W / 53.241870°N 6.142782°W / 53.241870; -6.142782	Dublin Bus routes Go-Ahead Ireland routes	Cherrywood Loughlinstown St. Columcille's Hospital

Bridges

The line re-uses some existing bridges and viaducts and has had new bridges specially constructed. The new build William Dargan Bridge at Dundrum crosses the Slang River. The River Liffey is crossed by the new Rosie Hackett Bridge southbound and the existing O'Connell Bridge northbound. The River Dodder is crossed by the Nine Arches Bridge originally constructed for the Harcourt Street railway line in 1854.

Depots

The Green line initially was provisioned with a works depot just past the Sandyford terminus and opposite the old Stillorgan railway station building. The depot could stable 32 trams.^[6] When the Green line was extended to Broombridge a further depot was constructed over part of the old Liffey Junction site. It was named Hamilton Depot in honour of William Rowan Hamilton who developed the quaternion mathematical number system.^[7] The primary control facility for the Luas system for such functions as power and signally lies at the Red line Luas depot at Red Cow. Following a storm damage incident in October 2017 at Red Cow it was found the depots at Broombridge and Sandyford were not able to take over the function and the whole Luas system was suspended for two days.^[8]

Green Line upgrade to metro

A portion of the Luas green line between Charlemont and Sandyford was built with the eventual intention that it be upgraded to carry metro services.^[9] In the development of rail based public transport in Greater Dublin, it was envisaged that Metro North would be completed and operating by 2012.^[10] It was further planned under the Platform for Change^[11] that Metro South, due to operate from St. Stephen's Green to Sandyford would follow this by, according to the Platform for Change, 2020.

However, due to the Great Recession, Metro North was delayed until 2015 at which point it was revived as the "new Metro North".^[12] At this stage, efforts were undertaken by the National Transport Authority to improve upon the original Metro North design and alignment. Originally, Metro North's 2012 alignment would connect to Iarnród Éireann's Western Commuter line at Drumcondra. However, new consideration was given by the NTA in the intervening period between 2015 and 2018 to divert the metro line from Drumcondra to Cross Guns Bridge, a point where the Western and South Western Commuter lines meet. Diverting to this area and building a brand new station called Glasnevin would enable the Metro to interchange with two rail lines both of which, would be high frequency DART lines^[13] at the time of the metro's opening. As the scale of the new metro North project grew, the decision was made to upgrade the Green Line from Charlemont to Sandyford to metro standard and connect it to Metro North all at once. This decision was made due to the Green Line's overcapacity issues.^[14] It was forecast that without an increase of capacity and frequency the tram service provided by the Green Line would eventually become dangerously overcrowded. When the new project was announced to the public in 2018, it was announced as MetroLink, a metro line running from Swords, under Dublin Airport to Dublin city centre, emerging in the Charlemont area, before continuing on the newly upgraded Green Line to Sandyford.

Green Line upgrade deferred

If completed as was planned, metro trains would replace Luas trams between Ranelagh and Sandyford, with a new station interchange between the two lines at Charlemont (Luas trams would continue from Charlemont north to Broombridge. The Luas would also continue operating between Sandyford and Bride's Glen).^[15]

During the public consultation process for this proposal, Dublin City Council submitted that a large sewer was blocking the path of where the tunnel was planned to emerge, just south of the existing Charlemont tram stop.^[16] This necessitated the realignment of the tunnel portal to just north of the current Beechwood Luas stop. This realignment also meant that the planned upgrade of the Luas line would grow in size from a possible 9 months to nearly 48,^[17] as the tunnel boring machine needed to reach the new portal in Beechwood before the Green Line upgrade works could begin. This would therefore delay the opening of the entire Metrolink line. The constructability report detailed, however, that if the Green Line Upgrade was done as a second phase to the northern section, then the northern could open on schedule. By completing the Green Line upgrade as a second phase, time savings could also be made on the upgrade works.

Status of proposed upgrade

This news, when announced in March 2019, was widely reported as the upgrade having been "shelved"^[18] or "abandoned."^[19] However, the project is still planned as part of the Greater Dublin Transport Strategy 2016-2035^[20] which the National Transport Authority remains legislatively bound to pursue. In May 2019, this commitment was reaffirmed by Transport Infrastructure Ireland in an episode of 98FM's On the Move transport podcast:^[16]

The goal is still, of the Strategy, to deliver a metro to Sandyford. Simply, we are not going to do it now, or in the short term.

— Paolo Carbone, Head of Public Transport Capital Programmes at Transport Infrastructure Ireland

As of April 2020, it was still the position of both Transport Infrastructure Ireland and the National Transport Authority to upgrade the Green Line from Beechwood to Sandyford to metro standard as no change had been made the Greater Dublin Transport Strategy. However, due to the economic downturn as expected from the Coronavirus disease 2019 crisis, this is subject to change.^[21]

Luas Finglas

In July 2020, a public consultation was announced seeking feedback on the extension of the Luas Green line from Broombridge, across the River Tolka through Tolka Valley Park, through West Finglas before terminating at Charlestown.^[22]