DART Underground is the ideal solution. Everyone accepted that it was, right up to the moment the first cheque had to be written. Then the money vanished into the fiscal space on the most spurious of pretexts and there it has remained.
DART Underground suffers from not exactly being identified with any given Dail Constituancy insofar as it benifits so many areas as a whole. Metro North is easily identified with the North Dublin area (and indeed the proposed southern terminus just happens to be in the minsters area - go figure).
We are the passengers