Irish Rail is conducting engineering works.
Engineering work continue on the line between Kildare and Portlaoise tonight.
Irish Rail says the project will mean alterations or delays to some services tonight, and on Friday night.
In some cases, bus transfers are in operation.
The services affected over the next three nights are:
22:10 Heuston to Portlaoise will operate to Kildare only, bus transfers direct from Kildare to Portlaoise, second bus transfer from Kildare to Monasterevin, Portarlington and Portlaoise
20:33 Portlaoise to Heuston will operate in an altered path
21:25 Portlaoise to Heuston is cancelled
22:30 Portlaoise to Heuston will commence from Kildare at 23:05 and will operate in an altered path

Serious Crash Closes Milltown Bridge
Locals Urged To Make Their Votes Count In Tomorrow's Presidential Election
New Report Finds Just Two Homes Available Under HAP In Kildare
HGVs, Empty Shops And Missed Links: Castledermot’s Town Plan Open To Public For Third Consultation
Land Owner To Decide If Details Will Be Released On Hundreds Of Skeletons Found In Naas
Kildare Public Can Now Donate To Oxfam Through Free Doorstep Donation Scheme
€10 Million Settlement For Celbridge Man With Cerebral Palsy In National Maternity Hospital Case
Clicks And Cash: Kildare TD Mark Wall Among Top Social Media Spenders During Last General Election