Gardaí in Clondalkin in Dublin are keen to speak with the driver of an Audi car to establish what happened during a crash last week.
One man in his 30s died after the crash on the N7 Westbound.
A witness appeal in the wake of this crash last Saturday morning has been renewed today by Gardaí at Clondalkin station.
It happened between the Rathcoole and Athgoe exits on the N7 at about 9am.
The crash involved a car and a truck, one man in his 30s was pronounced dead at the scene.
He had been travelling in the car, as a passenger.
Investigating Gardaí are appealing for information as they piece together what happened.
They're especially keen to speak with the driver of a grey colour Audi A5 Sportback car that was seen in the area around that time.
Officers have also asked for any camera footage, from dash-cams or other devices, from that part of the N7 on Saturday morning to be made available.
Anyone with information can contact Clondalkin Garda Station, the Garda Confidential Line, or any other Garda Station.