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/ 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, Waterford and Galway InterCity service as well as the Kildare and other Commuter services use the same track. This would cause major interference to the DART frequency and service. So Iarnród Éireann 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 was built in the Spencer Dock area of Dublin city centre. Its purpose was to increase the capacity and frequency of rail services that operate along the Sligo rail line, which was restricted by the heavily congested Dublin Connolly Station. Groundbreaking 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 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 (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