Westgate Highway Patrol officers intercepted a Range Rover allegedly travelling 78km/h over the limit in Williams Landing this morning.
Officers were patrolling the Princes Freeway about 1.25am when they noticed the vehicle headed towards the city at 178 km/h in the 100 km/h zone.
They intercepted the Range Rover and spoke to a 33-year-old man from Braybrook.
He underwent a preliminary breath test and then underwent an evidentiary test where he returned an alleged reading of 0.091.
His car was impounded and his licence immediately suspended.
He is expected to be charged on summons for speed dangerous, drink driving and other traffic offences.