The Galway to Limerick line the most frequently disrupted rail services in Ireland with 146 separate incidents in 2017.
The number of journeys either cancelled or delayed was even worse the year before with rail services disrupted 616 times.
According to the Irish Times there were 1,094 services disrupted nationwide in 2017, coming to three separate incidents a day.
Other badly hit rail lines include the Dublin to Belfast and Dublin to Dundalk routes with over 100 disruptions each last year.
Figures were obtained by Green Party transport spokesperson Ciarán Cuffe found that Irish Rail has spent €2.5 million on taxis and buses for stranded passengers in the past five years.
That breaks down to €791,000 spent on taxis and a further €1.7 million hiring buses for stranded passengers.
Deputy Cuffe said that this level of closures would be unacceptable of it happened on a motorway.
Chief executive of Irish Rail Jim Meadesaid said that line closures generally took place for scheduled engineering works, which are required for safety.
He added that these disruptions only make up a low percentage of more than 230,000 services that ran last year.
This morning passengers are dealing with major delays of up to 80 minutes on all rail services leaving Heuston station, and a 30 minute wait for all inbound trains.