Two P-plate drivers allegedly speeding along Hepburn Avenue have had their cars impounded and have been charged with reckless driving.
A police spokeswoman said Traffic Enforcement Group officers conducting patrols last night spotted two vehicles travelling at speed about 10.30pm.
Police allege a PT Cruiser and a Holden Commodore were racing along Hepburn Avenue in Alexander Heights with the Cruiser estimated to be travelling at 141Km/h and the Commodore 148Km/h in a 70Km/h zone.
The 18-year-old male driver of the Commodore and the 19-year-old male driver of the Cruiser have been charged with reckless driving and will appear in the Joondalup Magistrates Court at a later date.
Both vehicles have been impounded for 28 days.