The country music star is performing a five-night run of concerts over the next two weekends.
Additional train services are being added in the midlands to cater for Garth Brooks fans travelling to Croke Park.
The country music star is performing an historic five-night run of concerts in Dublin over the next two weekends.
Irish Rail says pre-booking is essential on all intercity routes and customers must travel on the specific train booked.
Additional late night Intercity trains will operate, with a 12.40am Heuston to Cork service after each night's concert, along with added services on the Drumcondra to Longford and Heuston to Portlaoise lines.
Extra staff and security will also be available to assist customers travelling to and from the concerts.
Customers for all services are advised to check times before travel at irishrail.ie (some trains depart after midnight, please also check next day date – e.g. concert on Friday 9th September, check Saturday 10th September for post-midnight times).