page_title: Luas
section_title: Track and rolling stock
hierarchical_section_title: Luas / Infrastructure / Track and rolling stock
caption_attribution_description: English: original digital image Suckindiesel 22:59, 2 April 2007 (UTC)
context_page_description: Luas is a tram/light rail system in Dublin, Ireland. There are two main lines: the Green Line, which began operating on 30 June 2004, and the Red Line which opened on 26 September 2004. Since then, both lines have been extended and split into different branches further out of the city. The two lines, as of 2017, now intersect and connect within Dublin city centre. The system now has sixty-seven stations and 42.5 kilometres of revenue track, which in 2018 carried 41.8 million passengers, an increase of 11.2% compared to 2017.
  Luas is operated by Transdev, under tender from Transport Infrastructure Ireland. The Luas was a major part of the National Transport Authority's strategy. Three extensions to the existing Luas lines have been completed. Construction of a 6 kilometres extension to the Green line to the North city centre and Broombridge, which links both Green and Red lines, began in June 2013 and opened to passengers in December 2017. This is the extension route previously known officially as BXD.
context_section_description: The system operates on a 750 V DC overhead power supply. The international standard rail gauge of 1,435 mm (4 ft 8 ¹⁄₂ in) is used, rather than the Irish 1,600 mm (5 ft 3 in).
  The silver Alstom Citadis trams, manufactured in La Rochelle, France, reach a top speed of 70 km/h on off-street sections, but travel at a slower speed on-street where conflicts with other vehicles and pedestrians can occur. The 26 initial Red Line '3000' Class trams were 30-metre (98 ft) long Citadis 301 configurations with a capacity of 256. The 14 Green Line '4000 Class' trams, each 40-metre (130 ft) long Citadis 401 configurations, have a capacity of 358 including two wheelchairs. Starting in 2007, all the Red line trams were upgraded to 40 metres (130 ft) by inserting two more articulated sections, with the last one converted by June 2008. Both configurations of tramcars are fully compatible with both the Red and the Green Lines.
  Twenty-six new 43-metre Citadis 402 trams, numbered as the '5000 Class', were ordered for delivery in early 2009. These are 100% low-floor configuration and solely operate on the Green Line, with the 4000 Class trams cascaded to the Red Line after the entire 5000 Class had been introduced.
  Seven further, 55-metre (180 ft) Citadis 402 variants were procured for use on the St. Stephen's Green – Broombridge line. They were brought into service between January and June 2018. These are numbered as members of the 5000 Class, with all existing 5000 Class units being lengthened to match. 8 further new units were ordered for delivery during 2020, with the first of those entering service in July 2020. In October 2019, it was announced that 26 existing Green Line trams would be extended to 55 metres (180 ft).
  In other aspects, the two lines are identical except that the inter-axis width between the tracks on the Green Line is slightly wider than on the Red Line. The construction planning for the Green Line ensures a distance of track centres at 3,400 millimetres (11.2 ft) including a 400 millimetres (16 in) extra for the kinematic envelope of metro trains. This does not relate to the track gauge of 1,435 mm (4 ft 8 ¹⁄₂ in), which is identical on both lines. This will allow wider metro trains be run on the same tracks if a proposed upgrade to full metro service is implemented. This is possible because the route uses an old railway line and as such has few interactions with vehicular or pedestrian traffic. The Railway Procurement Agency has stated (November 2006) that "We still envisage conversion of almost all Luas lines to light metro standard in the long-term.". Platform length also varies between lines, with the original 40-metre (130 ft) platforms lengthened to 55 metres (180 ft) on the Green Line 
  The main engineering structures on the Green Line at present are Milltown Viaduct, also known as The Nine Arches, a large stone viaduct dating from 1854, and the William Dargan Bridge, a large cable-stayed bridge at Taney Cross, near Dundrum town centre.
caption: The Nine Arches Bridge on the Green Line at Milltown
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