Christopher Jeffrey, of no fixed address, appeared in Horsham Magistrate's Court on Tuesday and pleaded guilty to a range of offences, including drug-driving and using an unsafe vehicle.

The court heard that police caught Jeffrey, 54, driving a prime mover with a bald tyre on May 27, 2016.

Police prosecutor Senior Constable Belinda Ryan said Jeffrey was drug tested, which was positive for methamphetamine.

She said Jeffrey had also driven for 15-and-a-half hours in a 24-hour period, which is a breach of his rest requirements.

Truck drivers can drive a maximum of 12 hours in a 24-hour period, or 14 hours if they have basic fatigue management accreditation.

The court heard that Jeffrey lost his driver's licence after a drug-driving charge in South Australia earlier this year.

Magistrate Ronald Saines described the charges as "very serious offending".

"Every state in Australia has laws in place to reduce the risk of heavy vehicle accidents," he said.

"When you are driving heavy loads, there is a risk of maximum destruction and loss of life - either yours or someone else's.

"If you are driving for long periods, outside regulations and drug affected, that is exactly the recipe for disaster.

"If you have an attitude that you are prepared to cut corners about how long you drive, then you have no role to play in the transport industry."

Mr Saines said he would sentence Jeffrey to a "significant period" of disqualification.

"One breach of this nature is enough to take you off the road," he said.

"You are responsible for what hours you hold the steering wheel and when you rest.

"If you repeat this conduct and cause someone's death, you will see the inside of a jail cell."

Jeffrey was fined $2500 and his driver's licence was disqualified for six months.

He was also ordered to pay $124.30 in court costs.