A 12-year-old boy left Kendall, on the NSW Mid-North Coast, and travelled one third of the way across the country in a vehicle before being stopped by police in Broken Hill.
The Australian Press Association reports the boy was stopped about 800 miles into the drive on Saturday morning, having traversed the entirety of New South Wales from his starting point in Kendall, near Port Macquarie.
Highway patrol officers stopped the boy in Broken Hill when they noticed the car's bumper was dragging on the ground.
The boy apparently wanted to drive across Australia solo, a journey of nearly 4000km.
Police said the boy was taken to Broken Hill Police Station, and that inquiries were continuing.
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He was en route to Perth, a police spokesman said in a statement on yesterday.
Police said he was driving to the west coast city of Perth, more than 4,100 kilometers (2,500 miles) from Kendall.
A 12-year-old Aussie kid has made the incredibly bold and ill-advised decision to drive from Kendall, NSW to Perth in Western Australia.
The trip was scheduled to take about 40 hours and would have gone through the desert of Nullarbor Plain.
It also advises drivers to "carry extra petrol and plenty of water and food".