Irish Rail has said it will make changes to its new timetable after it caused delays to some services in and around the capital.
The new timetable, which was introduced two weeks ago, increased some intercity services but has led to congestion and knock-on delays on routes that feed into Dublin's Connolly Station.
Irish Rail said a number of changes to departure times and platforms will be implemented from next Monday to try to resolve the issues.
It said there would be additional intercity services from Dublin to Galway and Waterford; provision for a new hourly service between Dublin and Belfast which begins in October; and additional weekend services to Cork.
The new timetable also saw Sligo services stop in Broombridge and the opening of a station at Kishoge in west Dublin.
As part of the changes, some services that previously ended at Grand Canal Dock are now terminating at Connolly Station.
DART and commuter times were adjusted to accommodate the new timetable.
Irish Rail acknowledged that the new timetable has resulted in congestion in the Connolly Station area and resulted in delays to a number of intercity and DART services.
"We have experienced some issues impacting punctuality performance in the first two weeks of the implementation of the new timetable, notably arising from congestion in the Connolly Station area affecting commuter routes feeding into Connolly."
Barry Kenny, Head of Corporate Services with Iarnród Éireann, said the timetable had impacted a lot of commuter services including at peaks times and Irish Rail hope the new measures will change that.
"From next Monday we will be changing the times on a number of services primarily on the Maynooth and northern commuter routes, and minor changes on other routes also, and this will be additional minutes in the scheduled journey time to ensure we are hitting that punctuality.
"That's been the biggest issue we've had over the last couple of weeks, we want to correct that," said Mr Kenny.
Irish Rail has apologised to its customers and said it hopes the new changes will improve services.
