Gardaí at Nenagh Co Tipperary are investigating a single vehicle fatal road traffic collision.
The incident occurred on the M7 motorway between junction 24 and junction 23 northbound at 7am this morning.
A female driver and only occupant of a car was pronounced dead at the scene.
Gardai believe that the car struck a barrier.
The woman's age is unknown.
The motorway between junctions 24 and 23 is currently closed to facilitate a Garda forensic collision investigation and will remain closed for a number of hours.
Witnesses are asked to contact Nenagh Garda Station on 067 50450 The Garda Confidential Line on 1800-666-111 or any Garda Station