The road remains closed as Garda Forensic Collision Investigators carry out a full examination, with local diversions in place.
Gardaí are appealing for witnesses following a fatal road traffic collision in Newbridge last night.
Emergency services responded shortly after 8pm to the single-vehicle crash involving a pick-up truck on Barrettstown Road.
A male passenger in his late teens was taken to Naas General Hospital, where he was later pronounced dead.
The teenage driver was brought to Tallaght Hospital with non-life-threatening injuries.
No other injuries were reported.
The road remains closed as Garda Forensic Collision Investigators carry out a full examination, with local diversions in place.
Gardaí are urging anyone who witnessed the incident, or who may have dash-cam footage from the area between 7.45pm and 8.15pm, to contact Newbridge Garda Station on 045 440180, the Garda Confidential Line on 1800 666 111, or any Garda station.

29 New Jobs To Be Created As Chemist Warehouse To Open In Naas Tomorrow
Vulnerable Adults, Some Using Wheelchairs, Forced To Share Inaccessible Vehicles At Kildare HSE Service
“Grabbed By the Neck”: Founder Tells Kildare Today Why She Launched New Female-Focused Taxi Service
Just 75% Of Landowners On Board So Far As Uisce Eireann Submits Plans For Major Water Supply Project
Two Kildare Animal Charities Share €170k Fund As Animal Welfare Costs Continue To Mount
Call To Make Extended Christmas Train Timetable Permanent For Commuter Towns
Roadside Memorial Ban Proposal Criticised Over Christmas Timing
Man (30s) Dies Following Collision Involving Bus, Car And Pedestrian At Kishawanny, Carbury