 Each will run from the North-West & South-West of the city, through the city centre and then extend south and north respectively.This plan is made possible with the DART Underground rail project, boring a tunnel under the city centre that will join Heuston Station with Pearse Station and a relocated Docklands station, via St Stephen's Green.The railway lines from Heuston towards Kildare (Hazelhatch) and from the city centre to Maynooth will be electrified, and the old line to Navan reopened and electrified.