Residents awoke just after 5am to the sound of the car hitting a light pole near Sanderstead Loop on September 6.
Police spokeswoman Ros Weatherall said witnesses saw the car, driven by a Clarkson man (21), travel across a roundabout and hit a light pole and bollards.
The pole ended up spread across the median strip, and St John Ambulance took the driver to Joondalup Health Campus with non-life-threatening injuries.
Police are still investigating the crash. Anyone with information can call Crime Stoppers on 1800 333 000.