Irish Rail has announced the planned disruption to DART and Innercity services over the Easter Bank Holiday weekend.
Due essential works needed to be carried out on overhead wires and tracks, DART services between Greystones and Grand Canal Dock will be suspended.
The suspension will take place on Saturday, April 16 to Monday, April 18.
Irish Rail has said valid train tickets will be honoured by Dublin Bus and Go Ahead services between the affected areas.
Meanwhile, the Dublin and Rosslare Innercity service that serves Wicklow will operate as a bus transfer between Dublin Connolly and Greystones.