It was a busy few days for SA Police on the roads over the long weekend.
On Thursday Police allege they detected a car travelling at 147km/h in a 110km/h zone along Horrocks Pass Road at Winninowie.
The 55-year-old man from Wilmington who was driving the car received a $980 on-the-spot fine and lost 7 demerit points.
On Friday in Port Pirie, three drug drivers tested positive for drugs.
Police stopped a vehicle for a mobile driver test. The driver, a 51-year-old man who held a provisional licence, tested positive to methamphetamine.
About an hour later, a 44-year-old woman, also on her Ps, tested positive to cannabis.
A 43-year-old man was later stopped for driving offences and he tested positive for methamphetamine. Police checks revealed his licence was already disqualified and he was arrested. He was bailed to appear in court at a later date.
The samples have been sent for forensic analysis and the P-platers are expected to lose their licences for breach of conditions
On Saturday police continued conducting mobile driver testing in Jamestown. A male driver underwent a breath test, returning a positive reading of 0.143.
The 43-year-old Port Pirie man was reported for exceeding the prescribed concentration of alcohol, he was issued with a six-month immediate loss of licence notice, his car was impounded for 28 days and he will be summonsed to appear in the Port Pirie Magistrates Court at a later date.
A fatal crash also occurred in Snowtown Saturday morning.
Police and emergency services were called to the Augusta Highway at Snowtown where a truck had crashed into a tree.
The single occupant of the truck, a 36-year-old man from Morphett Vale, died at the scene, despite the efforts of members of the public and paramedics.
The State's road toll now rises to 83 compared to 55 at the same time last year.