A 44-year-old man from Mandurah died after a crash in Nambeelup on November 11.
Major Crash officers are investigating the fatal crash on the Kwinana Freeway.
Police said the crash was at 12.08am about 3km north of Pinjarra Road.
The driver of a Nissan X Trail towing a trailer was travelling north and lost control of the vehicle.
The X Trail rolled into the median strip, causing the driver to be ejected from the vehicle and land in the southbound lanes.
He was then struck by a Mitsubishi Pajero travelling south.
St John Ambulance attended the scene but the man died from his injuries.
Police would like to speak to anyone who saw the crash or the X Trail travelling before the crash.
Wednesday, November 14 is #SnapPerth Day! Show us what’s so great about our local area by sharing a pic to Instagram, Twitter or Facebook with the hashtag #SnapPerth and you could have your snap featured in print. Last year Mandurah photographer Daniel Wilkins shared this photo at Soldiers Cove for #SnapPerth.