Police observed a Ford Falcon travelling at what appeared to be an excessive speed on South Western Highway, North Greenbushes, on Friday September 12 at 3.35pm.
"A speed reading was detected, and police will allege that the vehicle was travelling at 122km/h in a 90km/h zone," Bridgetown's Officer in Charge Sgt Daniel Fenton said.
"When the vehicle was stopped, it was found to be unlicensed and was not displaying any number plates. Further enquiries revealed that the driver, a 17 year old male from Dalyellup, was the holder of a Leaner's Permit only and, at the time, was not accompanied by an instructor."