Heavy demand for trains to Sunday's All-Ireland Hurling Championship quarter finals in Croke Park has caused Iarnrod Eireann to introduce a capped ticketing system.
Match-goers intending to travel on services from Galway or Cork will have to obtain a "control card" ahead of their journey. Cards are free of charge from InterCity stations.
The Croke Park doubleheader of Limerick v Wexford and Galway v Derry will also cause road congestion on Sunday.
Horse racing at the Curragh and the World Rally Masters at Punchestown Racecourse, both in Co Kildare, mean delays are likely on the N7, M7 and M9.
Air
Up to 214,000 passengers are expected to pass through Dublin Airport between today and Sunday with over 325 charter flights added to the normal schedule.
Holiday travellers are advised to use the long-term "Blue" car park which can be accessed using Exit 4 off the M50 at the Ballymun interchange. Shuttle buses will take passengers directly to the terminal.
For information on parking and getting to the airport, call freephone: 1800 20 40 10.
Rail
Disruption to services to the south and Dundalk is expected today due to unofficial industrial action by rail drivers.
The 7 a.m. Tralee/Heuston will operate with bus transfers from Tralee and Farranfore to Killarney. The 5.30 p.m. Heuston/Tralee will operate with bus connections from Mallow to Tralee.
The 11.25 a.m. Heuston/Mallow, 2.10 p.m. Mallow/Heuston, 2.45 p.m. Connolly/Dundalk and 4.10 p.m. Dundalk/Connolly are all cancelled.
In Dublin, engineering works are taking place on the southside DART line between 9.30 p.m. and midnight tomorrow and 8.30 a.m. and noon on Sunday. Shuttle buses will operate between Dun Laoghaire, Bray and Greystones.
Road
In Dublin, drainage works continue on the Navan Road by the Half Way House. Roadworks are ongoing on the N22 between Ballycartey Cross and Farranfore in Co Kerry.
Road Deaths
Twenty-one people died on the roads in the seven days up to last Wednesday, the highest death toll for any week on record. The fatalities bring to 219 the number of people killed on the roads this year.
Roadworks information courtessy of AA Roadwatch. weblinks: www.roadwatch.ie; www.irishrail.ie