Just to combat the Rugby heads.
My solution isn't a line on a map. Its the upgrading of Drumcondra station so all trains can serve it on big match days at CROKER, where a real mans game is played. Add to that the construction of a station on the midland line.
Considering, the serious parking violations that go on around Croke Park, its about time the transport infrastructure around it was used to greater effect. Shuttle trains could operate to both stations from Heuston/Connolly, thereby controlling the numbers disembarking to manageable levels. Once metro north is in, a lot of Dubs are happy. In fact if the whole DRP thing is ever actually implemented, Special DARTs can be provided year after year to the Leinster Final and All Ireland Football final, as the Dubs are there to stay.
As for Donnybrook and Landsdowne, build big carparks, so supporters can park their Mercs and 4x4s. "My goawd. Don't you knoow guys? Its not loike, cool, to, loike, take public trawnsport to a game. You knoow loike?"
And before all you recently declared Rugby supporters start having a go at me, iron your jerseys, don't tuck them into your slacks/chinos/jeans, sort out the youngones at the Wesley "dishco" (preferably coral them in leopardstown racecourse and bring them in by bus) and most importantly, remember that my tongue is firmly in my cheek.