Terry Robinson is recovering in Fiona Stanley Hospital after going into cardiac arrest on the Kwinana Freeway
Seven West media reports the 73-year-old was driving home on the Kwinana Freeway on Tuesday afternoon when he suffered a cardiac arrest and lost consciousness.
Mr Robinson's wife Alenka pulled the car over into the right emergency lane near the Armadale Road exit around 3pm.
Other motorist stopped and started to perform CPR on Mr Robinson until paramedics arrived.
Gary McDonnell told Seven West he had completed his first aid training only days before the incident, and stopped to provide the life-saving procedure to Mr Robinson.
“I managed to pull off the road to the left and then get across the traffic,” he told Seven West.
“They already had him out of the car when I got there and the communication was really good between us.”
“I said that I was first aid trained and asked if they wanted me to take over. They said, ‘No worries’.
“At that point I started to do the compressions on him. There was no breathing and no rise or fall of the chest, he was in real trouble.”
The 73-year-old grandfather is still in Fiona Stanley Hospital, but is now off life support and has no brain damage.
The Robinson family told Seven News they want to thank everyone for their assistance and amazing efforts on Tuesday afternoon.