A father of three was killed when his car hit a wall in the early hours of yesterday.
The victim, who was in his 40s, died at around 2.15am.
Last night, he was named locally as Darren Hedley, who had been living in Co Kildare.
Mr Hedley is understood to have had a son and two daughters. He was living with them and his partner in the Abbeyfield area of Kilcock.
Gardaí are investigating the single-vehicle crash that took place on the N4 inbound at Lucan in west Dublin.
A spokesperson for An Garda Síochána said the driver was pronounced dead at the scene of the crash.
"A man in his late 40s, the driver and sole occupant of the car, was fatally injured when his car left the road and struck a wall at approximately 2.15 this morning," the Garda spokesman said.
"The man was pronounced dead at the scene and his body was removed to Blanchardstown Hospital, where a post-mortem examination will take place."
The spokesperson added: "The road at the scene of the collision has reopened as Garda forensic collision investigators have completed their examination."
Parish priest Fr John Brickley, who is new to the area, said Mr Hedley was a very well-liked member of the community.
He said: "My understanding is that he loved living here and was settled very well in the area. He was a very good neighbour.
"It's a desperate tragedy, people here are just numb, it's simply terrible."
Gardaí are now appealing to anybody who may have witnessed yesterday morning's incident or who can assist them in their investigation to contact them at Lucan garda station on 01 6667300, the Garda Confidential line (1800 666111) or, alternatively, by contacting any Garda station.