Gardai are investigating a fatal road traffic collision that occurred on the Naas Road at approximately 6.20am this morning.
A male in his 20s was fatally injured when the 4×4 vehicle he was driving and sole occupant of collided with the barrier.
He was taken to Tallaght Hospital where he was pronounced dead.
There were no other vehicles involved in the collision and the man was travelling alone.
The incident took place on the N7 outbound near Junction 2 at Kingswood.
The road was closed to facilitate an examination by Garda Forensic Collision Investigators and has since reopened.
Gardaí wish to appeal for witnesses to contact Clondalkin Garda Station on 01 6667600, The Garda Confidential Telephone Line 1800 666 111 or any Garda Station.