The incident claimed the life of a man in his 60s.
Three people were killed and 13 serious crashes left road users with serious and life-threatening injuries over the Easter Bank Holiday Weekend.
Tributes have been pouring in for Gar Fennelly, a pensioner from Carlow, who died while he was out cycling in Castledermot on Easter Sunday.
One person wrote: "May you rest in peace Gar. Couldn't meet a kinder soul. Deepest sympathy to Tommy and family at this time."
Another said: "Deepest sympathy to Danny, Joe and all of Gar's family at this very sad and difficult time.
May Ger now rest in eternal peace."
Mr Fennelly is survived by his brothers and sisters Rita, Joe, Pauline, Danny, Patricia, Teresa, Thomas and Jenny.
Gar Fennelly
Inspector Ronan McDonald said Gardai are seeking to speak to a man who assisted during the incident at Knocknagee, Castledermot at approximately 11.30am.
He said a man stopped and assisted prior to the arrival of Gardai.
Meanwhile, 177 people were arrested for driving under the influence over the weekend, including 6 in Kildare.
2,630 drivers were caught speeding, with one person clocked doing 126 kilometres per hour in a 50 kilometre zone in Dublin.
220 people were fined for using their phone behind the wheel, and 77 people were caught with no seatbelt.
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