Alexander Richardson, 21, pleaded guilty in Warrnambool County Court to possessing methamphetamine and two charges each of dangerous or negligent driving while pursued by police and intentionally exposing an emergency worker to risk by driving.

The court heard that on March 25 this year, police were searching for a white Holden Commodore suspected of being involved in a number of police evades.

Then at 2.50am, Richardson was observed driving the Commodore at a McDonald's drive-through in Colac's Grant Street.

Police attempted to intercept the vehicle but Richardson sped off, entering two successive roundabouts - one of which he drove over, rather than around.

Police abandoned the pursuit for safety reasons.

Then at 3.55am the Commodore was observed parked outside Queen Street with its lights off.

Upon sighting police, Richardson performed an erratic U-turn, turned his lights on and quickly accelerated towards the unmarked police vehicle while driving on the wrong side of the road.

He drove at police at speed, narrowly missing the vehicle before moving back onto the correct side of the road.

The court heard Richardson then sped off, turning his headlights back off and continuing to drive on the wrong side of the road.

The police pursuit was again terminated.

Richardson was believed to be travelling in excess of 108km/h in a 50km/h zone.

Then at 9.05am, a Port Fairy police sergeant observed the same Holden Commodore travelling at 146km/h on a 80km/h stretch of the Princes Highway.

The sergeant observed the vehicle at the rear of Port Fairy's BP Roadhouse about 10 minutes later.

Richardson was observed in the driver's seat of the vehicle with three passengers.

When the sergeant attempted to block the vehicle's exit, Richardson reversed his car onto a gutter and into a garden bed. He then revved the car and drove directly towards the marked police vehicle.

The sergeant took evasive action and Richardson fled the scene.

The court heard Richardson was later observed attempting to perform a 'flick spin' (fast U-turn) and spinning his tyres, causing his vehicle to slide.

He then drove at the police vehicle, striking its metal bull bar.

The Commodore's rear wheels lifted off the ground as it bounced off the police vehicle and into a nearby pine tree.

Richardson then forced the damaged vehicle back onto the Princes Highway and sped off in an easterly direction.

He was arrested on Warrnambool's Queens Road at 10.40am and found in possession of about four grams of methamphetamine.

Police previously told The Standard that without the bull bar, the police van would have been a write-off.

Richardson's mother Trisha Marriot told the court her son suffered an acquired brain injury after a head-on motorbike crash when he was just 13.

She said her son and his three friends were riding two motorbikes, with two on each bike, when the head-on collision occurred about eight years ago.

"Before the accident, (Richardson) was very, very sensitive, happy, fun. A real bubbly kind of person," Ms Marriot said.

"After the accident he was moody, tired, fatigued and very angry."

The court heard that at the time of the offending, Richardson was under the influence of methamphetamine.

Judge Fran Dalziel will sentence Richardson next week.

Have you signed up to The Standard's daily newsletter and breaking news emails? You can register below and make sure you are up to date with everything that's happening in the south-west.