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 system, similar to the Porto Metro in Portugal, was originally planned. Stephen's Green to Belinstown (Metro North) The RPA had announced the Metro North from St Stephen's Green to Belinstown north of Swords 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