St John Ambulance, the Department of Fire and Emergency Services and WA Police were called to the scene about 12.30am after the yellow Hyundai hatchback hit a tree on the median strip.
A resident who lived nearby said he went to help but saw another car pull up and pull a person from the car wreckage.
When emergency services arrived, a female who was on the scene claimed to be the only person in the car.
PerthNow Digital Edition.
Your local paper, whenever you want it.Get in front of tomorrow's news for FREE
Journalism for the curious Australian across politics, business, culture and opinion.
READ NOWShe was taken by St John Ambulance to Royal Perth Hospital for minor injuries.
A police spokeswoman said they would be making further inquiries into whether there were more people in the car at the time.