Customers in Kerry planning journeys with Irish Rail this long weekend are being advised to check timetables before travelling.
Iarnród Eireann is warning a number of train lines will be closed this weekend for upgrades.
People travelling between Tralee and Cork Kent Station are advised that service alterations will be in place due to engineering works.
Bus transfers will be in place between Mallow Station and Cork on Saturday and Sunday.
Meanwhile, Sunday evening services at 5.10PM and 7.15PM from Tralee will only operate to Mallow.
The full revised Bank holiday timetable can be viewed on the Irish Rail website.