GARDAI have renewed their appeal for information on a car crash which claimed the lives of two young friends from Dundalk.
The first victims on the country's roads of 2011, Patrick Harper and Susan Larrigan were involved in a single vehicle collision.
The crash occurred near Milltown, on the southbound lane of the motorway between junctions 15 and 16 on January 1 at around 4.30am.
Patrick and Susan were the only people in a car which went out of control. The BMW, which was driven by Patrick, crashed into a wooden pole on the M1 motorway, killing both of them.
Postmortems were carried out in the Louth County Hospital on Sunday, January 2. As part of the postmortem process, blood samples were taken from both and sent for toxicology testing.
It is thought that the friends would have been killed instantly from the injuries they sustained.
The early stages of the investigation, which is being led by Gardai in Ardee, have led garda to believe the car joined the motorway at the Dundalk south slip road.
There are reports that for a short time it travelled on the hard shoulder before moving out into the motorway.
It is believed to have overtaken another car, a short distance south of Dundalk. As their car was moving back into its lane after completing an overtaking, it appears the vehicles may have tipped each other before the BMW went out of control.
It veered to the left-hand side of the road and crossed over the hard shoulder before going into a field alongside the motorway.
A wooden pole went through the driver's door. A Garda spokesman called on anyone who witnessed the crash or who was travelling on that stretch of motorway at the time to contact them either on 041-687 1130 or the Garda confidential line at 1800-666 111.
l The scene of the accident