
Transport 21 was an
Irish infrastructure
Infrastructure is the set of facilities and systems that serve a country, city, or other area, and encompasses the services and facilities necessary for its economy, households and firms to function. Infrastructure is composed of public and pri ...
plan, announced in November 2005. Its aims were to greatly expand Ireland's transport network. A cost estimate of €34 billion was attached to the plan at the time.
The plan included continuing investment in Ireland's road network, along with investment in public transport in the form of buses and rail.
After the collapse of the Irish banking system the Transport 21 project was cancelled in May 2011.
A portion of this investment would focus on the creation of an integrated rail network in Dublin. Projects included a
tunnel
A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is usually completely enclosed except for the two portals common at each end, though there may be access and ve ...
under
Dublin
Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...
city centre connecting
Heuston Station with
Pearse Station and
Docklands station at
Spencer Dock
Spencer Dock () is a former wharf area, close to where the Royal Canal meets the River Liffey, in the North Wall (Dublin), North Wall area of Dublin, Republic of Ireland, Ireland. As of the 21st century, the area has been redeveloped with oc ...
. This would facilitate the expansion of the
Dublin Area Rapid Transit
The Dublin Area Rapid Transit system (stylised as DART) is an electrified commuter rail railway network serving the coastline and city of Dublin, Ireland. The service makes up the core of Dublin's suburban railway network, stretching from Gre ...
(DART) system from one line to two. Also included were several new
Luas
Luas (, Irish language, Irish: ; meaning 'speed') is a tram system in Dublin, Republic of Ireland, Ireland. There are two main lines: the Green Line (Luas), Green Line, which began operating on 30 June 2004, and the Red Line (Luas), Red Line ...
lines, a
metro system, and tighter integration between all rail systems, particularly at the planned
St. Stephen's Green
St Stephen's Green () is a garden square and public park located in the city centre of Dublin, Ireland. The current landscape of the park was designed by William Sheppard. It was officially re-opened to the public on Tuesday, 27 July 1880 by Ar ...
interchange. This would create a single integrated rail network in Dublin that served the north, south, east and west of the city.
Other rail investment included the planned
Western Railway Corridor, redevelopment of a
rail link from Navan to Dublin and upgrading and extending
suburban rail in Cork.
Also included in the plan was the significant expansion of the
Dublin Bus
Dublin Bus () is an Irish State-owned enterprise, state-owned bus operator providing services in Dublin. By far the largest bus operator in the city, it carried 145 million passengers in 2023. It is a subsidiary of CIÉ, Córas Iompair Éireann ...
passenger-carrying capacity, completion of
the motorway system linking all the major urban centres on the island, and better integration of all transport systems.
Luas - Dublin
St. Stephen's Green to Luas Red Line (Line BX)
The RPA (Railway Procurement Agency) announced the new preferred route extension from the
Green Line stop at St. Stephen's Green to
Luas Red Line (Line BX) in 2011. The route continues on from St. Stephen's Green towards Dawson Street, Grafton Street Lower, College Green, Westmoreland Street, O'Connell Street and Parnell Square. Construction of the line began in June 2013 and was opened on 9 December 2017.
Connolly to Point Depot (Line C1)
The route for the Red Line extension (Line C1) from
Connolly to the Point Depot was fixed in the early 2000s and the Railway Order was signed by the Minister of Transport in December 2006. Construction works got underway in June 2007, with the centrepiece being a new bridge at the Harbourmaster Place end of Mayor Street. It was officially opened in 2009.
Sandyford to Brides Glen (Line B1)
The route for the Green Line extension (Line B1) from Sandyford to Brides Glen was chosen by the RPA and the Railway Order was signed by the Minister of Transport in August 2006. The line opened on 16 October 2010.
Brides Glen to Bray (Line B2)
The route for this line had been selected (Route 2). This project is currently being reconsidered by the
National Transport Authority.
Belgard to Saggart (Line A1)
A Red Line extension was planned from Belgard to Saggart to be built as a Public Private Partnership Initiative (PPP). The line received planning permission in June 2008 and construction got underway in February 2009. The track from Belgard began preparing for track laying on 11 January 2010 by closing the Belgard Stop. It became operational in 2011.
Line BX to Liffey Junction (Line D)
Construction on the Luas Line D began in June 2013. This route uses the former Broadstone rail alignment. It opened on 9 December 2017.
Light Rail Metro - Dublin
A
Dublin Metro project has been in discussion for many years. The construction of a
light metro
A medium-capacity system (MCS), also known as light rapid transit or light metro, is a rail transport system with a capacity greater than light rail, but less than typical heavy-rail rapid transit. MCS trains are usually 1 to 4 cars. Most medi ...
system, similar to the
Porto Metro in
Portugal
Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...
, was originally planned.
Stephen's Green to Belinstown (Metro North)

The RPA had announced the Metro North from
St Stephen's Green
St Stephen's Green () is a garden square and public park located in the city centre of Dublin, Ireland. The current landscape of the park was designed by William Sheppard. It was officially re-opened to the public on Tuesday, 27 July 1880 by ...
to Belinstown north of
Swords
A sword is an edged, bladed weapon intended for manual cutting or thrusting. Its blade, longer than a knife or dagger, is attached to a hilt and can be straight or curved. A thrusting sword tends to have a straighter blade with a pointed ti ...
via Dublin Airport and sought public comments on the route. A total of 17 stops are planned, and the length of each train would be 90m.
In October 2006, RPA published an initial route for Metro North, with a revised route appearing in April 2008. This route is to be a Public Private Partnership initiative (PPP) and in September 2008 the RPA applied to An Bord Pleanala for a Railway Order. In 2011, due to the economic climate, Metro North was deferred for a number of years.
Tallaght to Dardistown (Metro West)
The RPA had announced the Metro West from Tallaght to Dardistown, and had sought public comments on two route options. On 5 July 2007 the Emerging Preferred Route Corridor was announced. The route ran from Tallaght to Metro North at Dardistown, south of Dublin Airport via Clondalkin, Liffey Valley and Blanchardstown and was approximately 25.5 km long. This route was also to be a Public Private Partnership Initiative (PPP).
There is no timescale available for the Metro West project as it has been deferred until further notice.
DART - Greater Dublin Area
Under the Transport 21 Plan, the
DART network would have gone through a fundamental change from the coastally-focused north–south line which currently exists, to a two-line system which crossed the city. One of these lines (DART Line 1) would run from
Maynooth
Maynooth (; ) is a university town in north County Kildare, Ireland. It is home to Maynooth University (part of the National University of Ireland and also known as the National University of Ireland, Maynooth) and St Patrick's College, Maynoo ...
/ to via
Connolly station, while the other (DART Line 2) would run from
Balbriggan to , via the
DART Underground. Both lines would intersect at
Pearse.
Kildare Route Project
If the DART is extended from Heuston Station to Hazelhatch, it would quickly find itself in trouble, as the busy
Cork,
Limerick
Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the Provinces of Ireland, province of Munster and is in the Mid-West Region, Ireland, Mid-West which comprises part of the Southern Region, Ireland, Southern Region. W ...
,
Waterford
Waterford ( ) is a City status in Ireland, city in County Waterford in the South-East Region, Ireland, south-east of Ireland. It is located within the Provinces of Ireland, province of Munster. The city is situated at the head of Waterford H ...
and
Galway
Galway ( ; , ) is a City status in Ireland, city in (and the county town of) County Galway. It lies on the River Corrib between Lough Corrib and Galway Bay. It is the most populous settlement in the province of Connacht, the List of settleme ...
InterCity
InterCity (commonly abbreviated ''IC'' on timetables and tickets) is the train categories in Europe, classification applied to certain long-distance passenger train services in Europe. Such trains (in contrast to InterRegio, regional train, r ...
service as well as the
Kildare
Kildare () is a town in County Kildare, Ireland. , its population was 10,302, making it the 7th largest town in County Kildare. It is home to Kildare Cathedral, historically the site of an important abbey said to have been founded by Saint ...
and other
Commuter
Commuting is periodically recurring travel between a place of residence and place of work or study, where the traveler, referred to as a commuter, leaves the boundary of their home community. By extension, it can sometimes be any regular o ...
services use the same track. This would cause major interference to the DART frequency and service. So
Iarnród Éireann
Iarnród Éireann, () or Irish Rail, is the operator of the national Rail transport in Ireland, railway network of Ireland. Established on 2 February 1987, it is a subsidiary of CIÉ, Córas Iompair Éireann (CIÉ). It operates all internal I ...
decided to quadruple the track (originally 2 track) from Inchicore to just past Hazelhatch station. The Railway Order was signed by the Minister of Transport in December 2006. The project was partially completed in early 2010, with the section between Inchicore and Cherry Orchard deferred to Kildare Route Project Phase 2.
DART Underground
First suggested in the 1970s, the
DART Underground proposal called for a tunnel connecting the Northern DART line to the Kildare line. The project was shelved in 2011,
and not included in the Greater Dublin Area Strategy 2022 to 2042 published in late 2021.
Commuter - Greater Dublin Area
Docklands Station
Under Transport 21, a new
Docklands railway station
Docklands Station (''Stáisiún Dugthailte'', also known as ''Ceantar na nDugaí'') is a terminus railway station serving the Dublin Docklands area in Republic of Ireland, Ireland. It is owned and operated by Iarnród Éireann and was part of the ...
was built in the
Spencer Dock
Spencer Dock () is a former wharf area, close to where the Royal Canal meets the River Liffey, in the North Wall (Dublin), North Wall area of Dublin, Republic of Ireland, Ireland. As of the 21st century, the area has been redeveloped with oc ...
area of
Dublin
Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...
city centre. Its purpose was to increase the capacity and frequency of rail services that operate along the
Sligo
Sligo ( ; , meaning 'abounding in shells') is a coastal seaport and the county town of County Sligo, Ireland, within the western province of Connacht. With a population of 20,608 in 2022, it is the county's largest urban centre (constituting 2 ...
rail line, which was restricted by the heavily congested
Dublin Connolly
Connolly station () or Dublin Connolly is the busiest railway station in Dublin and Ireland, and is a focal point in the Irish route network. On the North side of the River Liffey, it provides InterCity, Enterprise and commuter services to ...
Station.
Groundbreaking
Groundbreaking, also known as cutting, sod-cutting, turning the first sod, turf-cutting, or a sod-turning ceremony, is a traditional ceremony in many cultures that celebrates the first day of construction for a building or other project. Such cer ...
ceremonies at the temporary location for the new station were held on 9 March 2006 and the station opened in March 2007.
By by-passing Connolly and using Docklands Station, it was possible to add extra services on the Maynooth and Longford Commuter services and it provided an alternative terminus for Western Commuter services to Clonsilla and M3 Parkway.
Clonsilla to M3 Parkway
The former Clonsilla to
Navan
Navan ( ; , meaning "the Cave") is the county town and largest town of County Meath, Republic of Ireland, Ireland. It is at the confluence of the River Boyne and Leinster Blackwater, Blackwater, around 50 km northwest of Dublin. At the ...
railway line was closed in 1963, but the trackbed was largely preserved.
Under the Transport 21 plan, a section of the disused Navan rail line would run from Clonsilla station in west Dublin to Navan in
county Meath
County Meath ( ; or simply , ) is a Counties of Ireland, county in the Eastern and Midland Region of Republic of Ireland, Ireland, within the Provinces of Ireland, province of Leinster. It is bordered by County Dublin to the southeast, County ...
(42 km). It uses Docklands Station in Dublin city centre exclusively. The first phase of the line (
Clonsilla to Dunboyne) included 3 new stations. It opened in September 2010. The second phase would have completed the line as far as Navan and it has been deferred until further notice.
Commuter - other
Mallow to Midleton - Cork
This project, to reopen part of the
Cork–
Youghal
Youghal ( ; ) is a seaside resort town in County Cork, Ireland. Located on the estuary of the Munster Blackwater, River Blackwater, the town is a former military and economic centre. Located on the edge of a steep riverbank, the town has a long ...
railway line as far as
Midleton
Midleton (; , meaning "monastery at the weir") is a town in south-eastern County Cork, Ireland. It lies approximately 16 km east of Cork City on the Owenacurra River and the N25 road, which connects Cork to the port of Rosslare. A satelli ...
, started construction in November 2007. New stations were built on the Northern Line to
Mallow from Cork's Kent station and on the Eastern Line to Cobh and Midleton, as well as a new 10 km section of rail line from Glounthaune to Midleton. A total of 7 new or reopened stations were constructed, in addition to the existing 7. The
Cork Suburban Rail network received increased funding under Transport 21.
The spur to Midleton piece of this project opened in July 2009. Seven new or renovated stations were opened during 2010.
Western Railway Corridor - additional phases
Under Transport 21, the
Western Rail Corridor
The Western Railway Corridor is a term, used since , for a partly disused railway line running through the west of Ireland. Currently two sections of the line, from Limerick via Ennis to Athenry and from Collooney to Sligo, see regular services ...
(WRC) from Ennis to Claremorris would have been re-opened in 3 sections.
The first section, Ennis to Athenry, was re-opened on 30 March 2010. In September 2006, the Minister for Transport announced that the government had approved funding for
Iarnród Éireann
Iarnród Éireann, () or Irish Rail, is the operator of the national Rail transport in Ireland, railway network of Ireland. Established on 2 February 1987, it is a subsidiary of CIÉ, Córas Iompair Éireann (CIÉ). It operates all internal I ...
to proceed with the development of the section. Work began in 2008, and an Intercity service is now provided between the cities of
Limerick
Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the Provinces of Ireland, province of Munster and is in the Mid-West Region, Ireland, Mid-West which comprises part of the Southern Region, Ireland, Southern Region. W ...
and
Galway
Galway ( ; , ) is a City status in Ireland, city in (and the county town of) County Galway. It lies on the River Corrib between Lough Corrib and Galway Bay. It is the most populous settlement in the province of Connacht, the List of settleme ...
.
The second section, Athenry to Tuam, was deferred "until further notice". The government had originally approved funding for the development of the section, subject to completion by Iarnród Éireann of a full appraisal.
The third section, Tuam to Claremorris, was also deferred "until further notice". If opened as proposed, the
Westport-
Dublin
Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...
, Galway-Dublin and Limerick-Dublin lines would have been connected together to provide inter-regional services within the Border Midland West Region.
Regional airports
Approximately €86 million was allocated to regional airports around Ireland. The airports included in the scheme were
Ireland West Airport;
Kerry Airport
Kerry Airport (; ), often called Farranfore Airport, is an international airport in Farranfore, County Kerry, Ireland. It is north off the Ring of Kerry and southeast of the county town, Tralee. Passenger services are operated by Ryanair an ...
;
Sligo Airport
Sligo Airport is located in Strandhill, County Sligo, west of Sligo, at the end of the R277 road (Ireland), R277 road, in Ireland. The airport is a small regional airport and has had no scheduled routes since 2011. It is the home of the Slig ...
;
Donegal Airport;
Waterford Airport and
Galway Airport.
€38.7 million was spent on projects aimed at improving safety and security, including better fire fighting equipment, new Instrument Landing Systems and navigational aids and the provision of Runway End Safety Areas at a number of airports.
The remaining €48 million had been approved for projects aimed towards catering for prospective businesses at these airports. However, this project was deferred until further notice.
See also
*
List of rapid transit systems
These lists of urban rail transit systems are sorted by the type of system:
* List of tram and light rail transit systems
* List of town tramway systems
* Medium-capacity rail system
* List of premetro systems
* List of metro systems
* List o ...
*
History of rail transport in Ireland
*
Rail transport in Ireland
Rail transport in Ireland (InterCity, commuter and freight) is provided by Iarnród Éireann in the Republic of Ireland and by Northern Ireland Railways in Northern Ireland.
Most routes in the Republic radiate from Dublin. Northern Ireland ha ...
*
National Development Plan
National Development Plan (NDP, ) is the title given by the Irish Government to a scheme of organised large-scale expenditure on (mainly) national infrastructure. The first five-year plan ran from 1988 to 1993, the second was a six-year plan f ...
References
{{reflist
External links
Rail Users Information on Transport 21
Proposed rail infrastructure in Northern Ireland
Proposed rail infrastructure in the Republic of Ireland
2005 in Ireland
2011 in Ireland
2021 in Ireland
Transport in County Dublin