Luas Dublin – The Tram System Transforming the Capital

The Luas is Dublin’s light rail tram system and one of Ireland’s most successful public transport investments. Since opening in 2004, the network has carried over 700 million passengers, grown to 67 stops across 42.5 kilometres of track and become as recognisable a feature of the Dublin streetscape as the city’s Georgian squares and the River Liffey itself. In 2025, the two Luas lines carried 55 million passengers – a figure that has consistently exceeded original projections at every stage of the system’s development.

With planning permission now granted for the Finglas extension and TII laying out an ambitious Luas 2050 vision, the tram network is set for its most significant expansion since the Cross City link opened in 2017.

🚋 The Two Lines – Green and Red

The Luas operates two main lines that intersect in the city centre.

The Green Line opened on 30 June 2004, initially running from Sandyford to St Stephen’s Green along part of the old Harcourt rail line. It has since been extended southward to Brides Glen and northward through the city centre to Broombridge in Cabra, where it connects with the Maynooth commuter rail line. The Green Line is the longer of the two, stretching approximately 19 kilometres with 35 stops from Brides Glen in south Dublin to Broombridge in the northwest.

The Red Line opened on 26 September 2004, running from Tallaght to Connolly Station. It has been extended to the Point (serving the Docklands) and split into two branches further west, with a spur to Saggart. The Red Line runs largely at street level, sharing road space with other traffic at several busy junctions.

The two lines were connected through the Cross City extension in 2017, which brought the Green Line north through the city centre via O’Connell Street, Broadstone and Phibsborough to Broombridge. This connection was transformative, creating a single integrated network where previously passengers had to transfer via walking or bus.

The fleet currently consists of 81 trams, operated by over 700 staff employed by Transdev under contract to Transport Infrastructure Ireland. In 2023, one in five public transport trips in Dublin was made on the Luas, and more than 400,000 Dubliners now live within one kilometre of a Luas stop.

📈 Ridership and Performance

The Luas has consistently exceeded ridership expectations. When it launched in 2004, forecasts anticipated around 20 million passenger trips in the opening year. Actual usage surpassed this target comfortably, and demand has continued to grow through every major expansion.

Annual ridership reached over 48 million journeys in 2023, broke the 50 million barrier for the first time in 2024 (a 12% increase on the previous year) and rose to 55 million in 2025. These figures make the Luas one of the most heavily used light rail systems in Europe relative to city size.

The system produces zero emissions at street level, contributing directly to Dublin’s air quality and climate targets. The TFI 90-minute fare, which allows free transfers between Luas, bus and DART within 90 minutes, was used 29.8 million times by bus passengers in 2024 – evidence of how integrated ticketing drives multi-modal journeys.

🔜 Luas Finglas – The Next Extension

Luas Finglas is the next planned extension of the Green Line, running approximately 3.9 kilometres from the existing Broombridge terminus to a new terminus at Charlestown, north of Finglas village. An Coimisiun Pleanala granted the Railway Order (planning permission) in October 2025 – less than a year after TII submitted its application – in what was widely regarded as a swift decision for a project of this scale.

The extension will add four new stops: St Helena’s (south Finglas), Finglas Village, St Margaret’s Road and Charlestown (close to the M50). A 350-vehicle Park and Ride facility will be provided near the St Margaret’s Road stop, with 80 protected cycle parking spaces and EV charging points.

The Finglas extension is projected to serve an estimated population of 56,000 by 2035. Journey times from Charlestown to Trinity College would be approximately 30 minutes during the morning rush – about 17 minutes faster than the current car commute. The NTA estimates the line will remove approximately 440,000 private car journeys from the route annually, with a single tram carrying the equivalent of 300 car passengers.

Approximately 70% of the new route will use grass track – an environmentally progressive design that reduces structural concrete by more than 50% compared to traditional embedded track, while also delivering benefits for biodiversity, noise reduction and surface water drainage. Two new bridges will be constructed over the Tolka River and Tolka Valley Park.

TII expects to complete the project within four years of construction starting, with services potentially operational by the end of 2031. The estimated cost is approximately €600 million. The project will also deliver segregated pedestrian paths and cycling infrastructure along much of the route, in line with the Greater Dublin Area Cycling Strategy.

🌐 Luas 2050 – The Long-Term Vision

Beyond Finglas, TII has set out an ambitious Luas 2050 vision that would dramatically expand the network over the next 25 years. An internal TII presentation, reported in mid-2025, proposed several major additions:

Extensions to existing lines – the Green Line would be extended south to Bray (with an indicative start date of 2028-2030) and a Luas extension to Poolbeg is being progressed in the short term. The Lucan extension remains part of the longer-term pipeline.

New lines – the vision includes potential new routes to Blanchardstown, Clondalkin, Balgriffin and Clongriffin, as well as a possible connection to UCD.

Circular lines – perhaps the most ambitious element, TII proposed two new circular routes running around the outskirts of the city centre. One suggested alignment would run from Finglas past DCU, through Drumcondra, along Griffith Avenue and onward to Marino and Fairview. An orbital route outside the M50 was also mentioned.

The presentation highlighted that the Red Line is already running at or over capacity, with not enough trams to meet demand. TII noted that longer 55-metre trams might not be the answer due to the Red Line’s street-running sections and safety considerations at busy junctions – meaning more trams, rather than bigger ones, are likely needed.

Separately, a Luas-style light rail system for Cork was re-announced in April 2025. The proposed 17-kilometre line from Ballincollig to Mahon Point would have 25 stops and bring light rail to Ireland’s second city for the first time.

⚙️ Capacity Challenges and Operational Issues

The Luas’s success has created its own pressures. The Red Line’s capacity constraints are well documented, with demand regularly exceeding available space during peak hours. Because large sections of the Red Line share road space with general traffic, trams are subject to delays at signalised junctions, limiting the frequency improvements that can be achieved without infrastructure changes.

The Green Line has more room for growth in the short term, but future extensions to Finglas, Bray and beyond will add significant passenger demand that will need to be matched with fleet expansion and depot capacity.

TII has identified land acquisition and potential expansion at the Red Cow depot as a medium-term priority to support increased fleet size. Workshops on accelerating project delivery have also been recommended to help speed up new Luas projects, acknowledging that the planning and procurement process for light rail remains lengthy.

🎫 Fares and Ticketing

Luas fares are paid through the TFI Leap Card, a contactless smart card that works across Dublin’s bus, tram and rail services. Adult single fares on the Luas are capped and vary by the number of zones travelled, with significant discounts available for students and children. Passengers can also pay using contactless bank cards or mobile wallets directly at the platform validators.

The TFI 90-minute fare has been transformative for Luas usage. Passengers who tag on with a Leap Card can transfer freely between Luas, bus and DART services within 90 minutes of their first tag, paying only a single capped fare for the entire journey. In 2024, this 90-minute fare was used 29.8 million times by bus passengers alone, indicating the scale of multi-modal journeys that the Luas enables as part of Dublin’s integrated transport network.

Enforcement operates through a proof-of-payment system. Passengers must validate their Leap Card or purchase a ticket before boarding, with roving inspectors checking tickets on board. Ticketless travel carries a €100 fine. All 67 Luas stops have ticket vending machines and Leap Card validators, and real-time arrival information is displayed on platform screens and available through the TFI Live app.

💰 Economic Impact and Urban Development

The economic impact of the Luas extends well beyond fare revenue. A comprehensive benefits report published by TII in 2024 – produced in collaboration with Transport for London Consulting – quantified the social, economic and environmental returns of the network over its first 20 years.

Property values along Luas corridors have risen measurably compared to comparable areas without light rail access. The system produces zero emissions at street level, contributing directly to Dublin’s air quality. Employment access has improved for communities along both lines, and the Luas has catalysed significant commercial and residential development around key stops.

The Dublin Transport-Oriented Development study identified capacity for up to 60,000 residential units at nine locations near existing or proposed high-capacity public transport nodes, including several Luas stops. With Dublin facing an acute housing shortage and a projected population of 6.1 million nationally by 2040, the relationship between light rail infrastructure and housing delivery has become a central planning consideration.

🔗 Integration with Other Transport Modes

The Luas is designed to integrate with Dublin’s wider public transport network at multiple points. At Broombridge, passengers can connect with the Maynooth commuter rail line and future DART+ West services. At Connolly and Heuston stations, Luas connects with intercity and commuter rail. Throughout the city centre, Luas stops are positioned to facilitate transfers to and from bus services under the BusConnects network redesign.

When MetroLink opens in the mid-2030s, it will create additional interchange points with the Luas and DART, significantly expanding the reach of Dublin’s integrated public transport network. The combination of metro, light rail, electrified commuter rail and redesigned bus services is intended to create a coherent system where passengers can move across the city on a single ticket, within a 90-minute fare window.

Luas Finglas will also provide Park and Ride interchange close to the M50, allowing commuters from north Dublin and surrounding counties to switch from car to tram. This model of peripheral Park and Ride served by high-frequency light rail is well established in European cities and represents a practical tool for reducing car dependency on congested urban corridors.

For a complete picture of how the Luas fits within Ireland’s transport investment programme, see our guides to transport in Ireland and transport infrastructure in Ireland. For detail on walking and cycling infrastructure being delivered alongside Luas extensions, see our guide to active travel funding.