Train services to and through Connolly Station in Dublin remain suspended today due to ongoing signalling work.
Many services will have bus transfers for the work which is part of a €120m project to allow extra services and improve safety.
Barry Kenny, from Irish Rail, says there will also be changes to some schedules for the next three weeks.
Monday 26th October:
Due to Engineering Works the following service alterations and amendments will occur: pic.twitter.com/ghT5buChaN
— Iarnród Éireann #StayHomeSaveLives (@IrishRail) October 26, 2020
He says "For the next three weeks, starting tomorrow and through to Friday, November 13th, there will revisions to the DART services, they'll be every 15 minutes instead of every ten minutes.
"The Maynooth M3 parkway, including Longford commuter and Drogheda commuter services, will have a revised schedule.
"Customers who must travel should check those times before travel at IrishRail.ie."