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Originally Posted by sean
Oisin, sign me up for most of that
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Duly signed up
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except: Ok first of all Heuston as a long-distance service terminus is way overrated IMO. too far from the city centre and the developing docklands.
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Heuston is more geographically central to where people live in Dublin. Long distance services aren't for everyday use.
(It's also near where I live)
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Second, many of the planned T21 lines will interchange with the Connolly based network, for example the Metro at Drumcondra.
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I would have the new Wexford line skirting across the southside and interchanging with the Luas green line somewhere near Sandyford (stretching it to Bray is a laugh) and with other southbound Metros & Luases. There would also be a non-stop heavy rail link to the airport.
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Thirdly, the cost of these new alignments and infrastructure that would be necessary for a small number of trains would be quite large - you could do a heck of a lot more for the Sligo and Rosslare lines with a lot less.
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Can't argue with the money, but then isn't this thread about forgetting the money.
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Although new intercity alignments bypassing the DART to go to Heuston would have the benefit of segregating the Maynooth-Bray local services from long distance services, the service frequency of both does not require such drastic measures nor will it for some time. A middle-road passing loop system with short stretches of 3 or 4 tracks here and there would allow local services to be run frequently while express services overtake them as needed at the passing loops.
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The new allignment would have the 3/4 track stretches from the start. Could run commuter services on this and also bring inter-city to Tallaght. It's population deserves that. It would also give you a faster way to the city centre through building faster lines. The existing line hugs the coast and meanders out to Dalkey and then back in.
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The Sligo/Longford and Rosslare/Gorey/Arklow lines should IMO be merged into a single set of Intercity and Commuter services.
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Excellent idea too. Obviously my scenario is completely hypothetical, but this would work.