It means there is service disruption on most routes through the county.
There will be significant disruption to train services to, and through, Kildare today and tomorrow.
Irish Rail is conducting engineering works are taking place between Hazelhatch and Newbridge
There are alterations to the Waterford services, via Kildare, with some cancellations and bus transfers - likewise on the Portlaoise service.
There are some cancellations on the Galway and Wesport services, via Kildare.
Full details are here
Alterations to services to and from Heuston Saturday 2nd October due to line improvement works https://t.co/U2HeEcemmD @TFIupdates pic.twitter.com/5A3w77a1ge
— Iarnród Éireann (@IrishRail) September 30, 2021

Analysis: Damning Reports Detail Rot, Fire Risks And Rodents At "Temporary" Celbridge Primary School
Kfm Obituary Notices
Major Curragh Community College Project Moves Ahead After Years Of False Starts
Plans For Walking Trail Within Castletown House Lands Under Consideration Subject To Removal Of Laurel
Council Blames Stolen Cars As It Refuses Warning Signs At Crash-Prone Bridge In Celbridge
Naas No-Shows Add To Driving Test Pressure As Kildare Test Queue Hits 1,975
Naas Hospital Promised Just 21 Extra Mental Health Beds At Lakeview Ward - With No Timeline In Sight
R405 Hazelhatch Road To Close Between Loughtown Road And Athgoe Road For Major Pipeline Works