A woman was killed this morning when the car she was travelling was in collision with an articulated truck near the toll plaza in north Cork.
Three women and one man were travelling in the car when it was in collision with the truck at around 6.15am.
The deceased woman, a back-seat passenger in the car, was in her 60s.
All four passengers of the car were rushed to Cork University Hospital following the incident and the deceased was pronounced dead at the hospital.
The driver of the truck was traumatised, but did not need to be hospitalised.
The crash happened around 200 metres north of the toll plaza at Watergrasshill where the road widens into several lanes for the toll booths.
It is believed all the women were foreign nationals.
Southbound traffic was diverted from junction 15 at Fermoy, through Corrin, Rathcormac and Watergrasshill.
There were minor delays on these routes during the busy rush-hour period when thousands of vehicles are travelling to the city.
The road was expected to remain closed for several hours as investigators try to discover what went wrong.
Fire crews and four ambulances were dispatched from Cork city and Fermoy to attend the scene shortly after 6.20am.
The last fire tender remained at the scene until 10.45am.
Gardaí in Cobh have appealed for witness to the crash.
Superintendent Pat Lehane said anyone who was travelling the road at the time of the incident should contact gardaí in Cobh on (021) 4908530.