The operator is putting on extra late night services for passengers leaving Garth Brook concerts.
Irish Rail has reminded those heading to see Garth Brooks this weekend they must pre-book inter city train tickets in advance.
The operator is putting on extra late night services from Dublin Heuston to Cork and Limerick, leaving the capital after midnight.
Only a limited number of seats are still available to book, and tickets will not be available at the platform.
Irish Rail's also running DART, Drumcondra, Maynooth, M3 Parkway, Dundalk and Portlaoise services after the concerts each night.