The original idea for the two Metro lines in Dublin can be attributed to the November 2001 "Platform for Change" report by the Dublin Transportation Office (now part of the National Transport Authority). The purpose of the report was to come up with an integrated transportation strategy for the greater Dublin region. In its report, the DTO outlined plans for three Metro lines. The first was a North-South line which would run from Swords to Shanganagh via Dublin Airport, Finglas, Broadstone, the city centre, Ranelagh, Sandyford and Cherrywood. The second would link Tallaght West to Tallaght and then continue through the south-western suburbs of Dublin to the city centre. The third line would run in an orbital pattern, with a spur off the Swords-Shanganagh line at Finglas and then continue via Blanchardstown and Clondalkin to Tallaght, where it would connect with the other line.