There are calls for a train station at Dublin Airport, which would serve every city in Ireland.
The Oireachtas transport committee has been discussing the All-Island Rail Review today.
It has heard large parts of Ireland have no railway service at all – with calls for new lines between Limerick and Sligo, and Sligo and Derry.
Richard Logue, from the Atlantic Economic Corridor Business Forum, says Dublin Airport also has no railway connections.
