Originally Posted by Del.Monte
I've often wondered if there was any case to be made, or reasons against, the alteration of the line from Newcomen Junction to Connolly to a burrowing tunnel to end beneath the mainline station rather than its present climb up to the suburban platforms? I'm probably missing something very obvious but it would seem to be a practical proposition.
The main use for such a line would be express services leaving/bound for Connolly that do not need to stop at Drumcondra. Especially as the Drumcondra line is starting to get slow/congested in the peak, the idea merits further thought.
I can think of a few reasons why that might not be such a good idea though.
- It would have to be a new branch in addition to the existing line. That is, coming from the Midland line, cross the canal bridge, new line deviates from the existing Newcommon incline. Otherwise, you would lose the ability to run a train from Pearse to the Midland line.
- Am underground station would require electric trains. No use to Sligo or Longford unless new regional and Intercity trains are ordered that can use elecricity (neither the 22ks nor the 29ks can use electricity in DART territory) the main users of said underground terminal would not be able to use it.
- The Connolly area is a collection of bridges, trying to put a sub-surface platform there would be ... fun to say the least.
The only way I can see a Platform 8 happening is if the station expands towards and over Amiens St. CIE/Irish Rail would have to CPO some buildings in the immediate vicinity, including likely the office block at 110 Amiens St. It could be done but would be expensive, I suspect they're thinking of a terminal platform 8 on the suburban platforms and using it to avoid conflicts associated with sending Western services to the sheds.