Three people were killed on the State's roads since the Garda Síochána's bank holiday campaign began on Friday.
Five people were killed on the roads in the same period last year and that figure rose to seven by Monday night in 2006.
In the lastest collision a 49-year-old man was killed when his Nissan Primera car hit a ditch in Co Cork between Clondrohid and Ballyvourney at 6.15pm yesterday.
The Polish man was killed instantly when he was thrown from the vehicle on impact.
A male cyclist died in Clare yesterday after he was struck by a vehicle at about 3.30pm.
Howard Flannery (39) from Ennis was cycling in the hard shoulder of the northbound lane of the Limerick to Ennis dual carriageway when he was struck by the four-wheel-drive at Carrigaron, Co Clare.
He was travelling on the inside of a second cyclist who was not injured. Mr Flannery was well known in the business community in Clare and was a former successful boxer as well as a keen cyclist and marathon runner.
On Saturday evening, a 41-year-old man died after his car and a tractor collided in Meath. Patrick Fitzsimons, Arbraccan, Navan, was driving on the main Dublin to Kells Road at Martry Cross when the collision happened at about 3.45pm on Saturday.
The driver of the tractor was uninjured.
Meanwhile, gardaí are investigating a collision involving a Garda vehicle in Donnybrook, Dublin, yesterday. A Peugeot 407 and a Garda Traffic Corps vehicle collided at the Anglesea Road junction with Donnybrook at about 12.45pm.