Instead of spending 15 billion, how much would the following cost?
all level crossings eliminated
bridges/tunnels all upgraded to allow 200kph all the time
Journey time for 266km to be 2h on limited stop trains, so 133kph average speed, including the stops
All to allow a mix of non-stop IC, limited-stop IC and stopping regional trains, for example:
Limited stop IC would stop as follows:
Portlaoise (end of stopping trains from Dublin)
200kph all the way, electrified
Separate DART from IC
(put new tracks in tunnel under DART tracks?)
(or make the mainline a new line via Dub airport?)
Journey time of 90 mins - might that be possible with stops at Drogheda, Dundalk, Newry, where else, ??