More inter-city trains have been added to the Waterford and Galway lines, with later departure times.
Irish Rail is urging regular commuters to double check their trains as its introduced a new timetable today.
It has come into effect today, and affects many routes around the country.
More inter-city trains have been added to the Waterford and Galway lines, with later departure times.
Irish Rail spokesperson, Barry Kenny, outlines some of the other changes.

Gardaí Launch Investigation As Bodies Of Man And Child Found At Separate Locations In The Capital
Naas Hospital Shifts Patient Debt Recovery In-House After Years Using Collectors
MEP Nina Carberry Appointed To Lead Negotiations On Next EU Farm Policy
Disqualified Driver Caught Just 100 Metres From Their Home In Kildare North
Weight Returns Faster After Fat-Loss Jabs Than Dieting, Major Study Finds
Higher Education Minister James Lawless Says En-Suite Student Rooms Seems “Quite Wasteful”
Hillfort Near Baltinglass Declared The Location Of Ireland's First Town
Gardaí Renew Witness Appeal After Fatal Collision Outside Kildare Town