The National Safety Council yesterday appealed to motorists to drive carefully over the bank holiday weekend. The council said speed and alcohol were the main causes of road deaths.
"Cities and towns across the country can expect an influx of visitors unfamiliar with the surroundings," a spokesman said. "Our hospitality is something we take pride in - let's be sure to extend it to how we treat tourists on our roads."
The council also urged caution from people engaging in water sports, particularly those using powerboats and jet-skis.
Met Eireann gave no promises on the weather front, saying the forecast for the weekend was very mixed. It would be cool and breezy today, with sunshine, cloud and scattered showers. Tomorrow would be cool and bright, with sunny spells and showers.
The Liberties Festival is taking place in Dublin throughout the weekend with nightly concerts. AA Roadwatch said there would be traffic restrictions in the area of Thomas Street, Francis Street, the Coombe and Meath Street.
Parnell Street will be closed from Ryder's Row to Capel Street from 7 p.m. on Sunday. Road works will begin on Homefarm Road today and continue for six weeks.
Gardai have advised of traffic restrictions around Croke Park on Sunday. The areas affected are Drumcondra Road Lower, North Circular Road and Ballybough Road.
Gardai have also asked spectators not to carry air horns, handheld smoke flares and flagpoles.
In Cork, there will be traffic restrictions for the Munster Hurling Championship match between Tipperary and Clare at Pairc Ui Chaoimh. AA Roadwatch has advised Tipperary supporters to use the Jack Lynch Tunnel and only park in designated areas. It has advised Clare to use the Lavitts Quay carpark.
Cork traffic on Sunday afternoon will be further complicated by a Eucharistic procession through the city.