A man in his late 20s has been arrested in connection with a fatal crash on the N7 at Kingswood in Dublin on September 21st.
Gardai are renewing their appeal for witnesses to the collision.
They are particularly keen to speak with truck or taxi drivers who were on that road between 12:15am and 12:45am that morning.
They've also asked anyone who has dash cam footage from the scene to come forward.
The suspect is being held at Clondalkin garda station.