Extra security has also been added.
Late-night commuter trains and DARTs make a return across the county from today.
The services will operate every Thursday, Friday and Saturday over the next three weekends in the run up to Christmas.
While extra security has also been added.
Meanwhile, the rate at which DARTs are arriving late is being described as poor and a concern.
The National Transport Authority says just 71 per cent of services are showing up within 5 minutes of their scheduled time during the evening rush.
Irish Rail says changes to the timetable and the annual leaf-fall season have made it a challenging few weeks, but improvements are on the way.

Kfm Obituary Notices (Sunday)
Forensic Tests Planned After Axle Discovery In Dullard And Jacobs Probe
Analysis: Damning Reports Detail Rot, Fire Risks And Rodents At "Temporary" Celbridge Primary School
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