A man in his 60s is in a critical condition in hospital following a collision with a lorry on the M1 between Belfast and Lisburn on Sunday (28 July).
It happened at around 6.50am on the motorway west-bound. The road, closed for seven hours, has now fully reopened.
The injured man is in a critical condition in hospital.
An investigation is underway and anyone who witnessed the collision or who has dash cam footage is asked to contact police on 101 quoting reference number 432 28/07/24.
A report can also be submitted online using the non-emergency reporting form via http://www.psni.police.uk/